Merge branch 'akpm' (incoming from Andrew)

Merge second batch of fixes from Andrew Morton:

 - various misc bits

 - some printk updates

 - a new "SRAM" driver.

 - MAINTAINERS updates

 - the backlight driver queue

 - checkpatch updates

 - a few init/ changes

 - a huge number of drivers/rtc changes

 - fatfs updates

 - some lib/idr.c work

 - some renaming of the random driver interfaces

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (285 commits)
  net: rename random32 to prandom
  net/core: remove duplicate statements by do-while loop
  net/core: rename random32() to prandom_u32()
  net/netfilter: rename random32() to prandom_u32()
  net/sched: rename random32() to prandom_u32()
  net/sunrpc: rename random32() to prandom_u32()
  scsi: rename random32() to prandom_u32()
  lguest: rename random32() to prandom_u32()
  uwb: rename random32() to prandom_u32()
  video/uvesafb: rename random32() to prandom_u32()
  mmc: rename random32() to prandom_u32()
  drbd: rename random32() to prandom_u32()
  kernel/: rename random32() to prandom_u32()
  mm/: rename random32() to prandom_u32()
  lib/: rename random32() to prandom_u32()
  x86: rename random32() to prandom_u32()
  x86: pageattr-test: remove srandom32 call
  uuid: use prandom_bytes()
  raid6test: use prandom_bytes()
  sctp: convert sctp_assoc_set_id() to use idr_alloc_cyclic()
  ...

153 files changed, 1977 insertions, 1912 deletions

diff --git a/drivers/block/drbd/drbd_receiver.c b/drivers/block/drbd/drbd_receiver.c
index a9eccfc6079b..83c5ae0ed56b 100644
--- a/drivers/block/drbd/drbd_receiver.c
+++ b/drivers/block/drbd/drbd_receiver.c
@@ -757,7 +757,8 @@ static struct socket *drbd_wait_for_connect(struct drbd_tconn *tconn, struct acc
         rcu_read_unlock();
 
         timeo = connect_int * HZ;
-        timeo += (random32() & 1) ? timeo / 7 : -timeo / 7; /* 28.5% random jitter */
+        /* 28.5% random jitter */
+        timeo += (prandom_u32() & 1) ? timeo / 7 : -timeo / 7;
 
         err = wait_for_completion_interruptible_timeout(&ad->door_bell, timeo);
         if (err <= 0)
@@ -953,7 +954,7 @@ retry:
                                 conn_warn(tconn, "Error receiving initial packet\n");
                                 sock_release(s);
 randomize:
-                                if (random32() & 1)
+                                if (prandom_u32() & 1)
                                         goto retry;
                         }
                 }
diff --git a/drivers/infiniband/hw/amso1100/c2.h b/drivers/infiniband/hw/amso1100/c2.h
index ba7a1208ff9e..d619d735838b 100644
--- a/drivers/infiniband/hw/amso1100/c2.h
+++ b/drivers/infiniband/hw/amso1100/c2.h
@@ -265,7 +265,6 @@ struct c2_pd_table {
 struct c2_qp_table {
         struct idr idr;
         spinlock_t lock;
-        int last;
 };
 
 struct c2_element {
diff --git a/drivers/infiniband/hw/amso1100/c2_qp.c b/drivers/infiniband/hw/amso1100/c2_qp.c
index 0ab826b280b2..86708dee58b1 100644
--- a/drivers/infiniband/hw/amso1100/c2_qp.c
+++ b/drivers/infiniband/hw/amso1100/c2_qp.c
@@ -385,8 +385,7 @@ static int c2_alloc_qpn(struct c2_dev *c2dev, struct c2_qp *qp)
         idr_preload(GFP_KERNEL);
         spin_lock_irq(&c2dev->qp_table.lock);
 
-        ret = idr_alloc(&c2dev->qp_table.idr, qp, c2dev->qp_table.last++, 0,
-                        GFP_NOWAIT);
+        ret = idr_alloc_cyclic(&c2dev->qp_table.idr, qp, 0, 0, GFP_NOWAIT);
         if (ret >= 0)
                 qp->qpn = ret;
 
diff --git a/drivers/infiniband/hw/mlx4/cm.c b/drivers/infiniband/hw/mlx4/cm.c
index add98d01476c..d1f5f1dd77b0 100644
--- a/drivers/infiniband/hw/mlx4/cm.c
+++ b/drivers/infiniband/hw/mlx4/cm.c
@@ -204,7 +204,6 @@ static struct id_map_entry *
 id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id)
 {
         int ret;
-        static int next_id;
         struct id_map_entry *ent;
         struct mlx4_ib_sriov *sriov = &to_mdev(ibdev)->sriov;
 
@@ -223,9 +222,8 @@ id_map_alloc(struct ib_device *ibdev, int slave_id, u32 sl_cm_id)
         idr_preload(GFP_KERNEL);
         spin_lock(&to_mdev(ibdev)->sriov.id_map_lock);
 
-        ret = idr_alloc(&sriov->pv_id_table, ent, next_id, 0, GFP_NOWAIT);
+        ret = idr_alloc_cyclic(&sriov->pv_id_table, ent, 0, 0, GFP_NOWAIT);
         if (ret >= 0) {
-                next_id = max(ret + 1, 0);
                 ent->pv_cm_id = (u32)ret;
                 sl_id_map_add(ibdev, ent);
                 list_add_tail(&ent->list, &sriov->cm_list);
diff --git a/drivers/lguest/page_tables.c b/drivers/lguest/page_tables.c
index 3b62be160a6e..864baabaee25 100644
--- a/drivers/lguest/page_tables.c
+++ b/drivers/lguest/page_tables.c
@@ -686,7 +686,7 @@ static unsigned int new_pgdir(struct lg_cpu *cpu,
          * We pick one entry at random to throw out.  Choosing the Least
          * Recently Used might be better, but this is easy.
          */
-        next = random32() % ARRAY_SIZE(cpu->lg->pgdirs);
+        next = prandom_u32() % ARRAY_SIZE(cpu->lg->pgdirs);
         /* If it's never been allocated at all before, try now. */
         if (!cpu->lg->pgdirs[next].pgdir) {
                 cpu->lg->pgdirs[next].pgdir =
diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
index a0639e779973..26500094de7c 100644
--- a/drivers/media/platform/Kconfig
+++ b/drivers/media/platform/Kconfig
@@ -145,7 +145,6 @@ config VIDEO_CODA
         depends on VIDEO_DEV && VIDEO_V4L2 && ARCH_MXC
         select VIDEOBUF2_DMA_CONTIG
         select V4L2_MEM2MEM_DEV
-        select IRAM_ALLOC if SOC_IMX53
         ---help---
            Coda is a range of video codec IPs that supports
            H.264, MPEG-4, and other video formats.
diff --git a/drivers/media/platform/coda.c b/drivers/media/platform/coda.c
index 20827ba168fc..b931c2a5c7fc 100644
--- a/drivers/media/platform/coda.c
+++ b/drivers/media/platform/coda.c
@@ -14,6 +14,7 @@
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/firmware.h>
+#include <linux/genalloc.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
 #include <linux/irq.h>
@@ -23,7 +24,7 @@
 #include <linux/slab.h>
 #include <linux/videodev2.h>
 #include <linux/of.h>
-#include <linux/platform_data/imx-iram.h>
+#include <linux/platform_data/coda.h>
 
 #include <media/v4l2-ctrls.h>
 #include <media/v4l2-device.h>
@@ -43,6 +44,7 @@
 #define CODA7_WORK_BUF_SIZE     (512 * 1024 + CODA_FMO_BUF_SIZE * 8 * 1024)
 #define CODA_PARA_BUF_SIZE      (10 * 1024)
 #define CODA_ISRAM_SIZE (2048 * 2)
+#define CODADX6_IRAM_SIZE       0xb000
 #define CODA7_IRAM_SIZE         0x14000 /* 81920 bytes */
 
 #define CODA_MAX_FRAMEBUFFERS   2
@@ -128,7 +130,10 @@ struct coda_dev {
 
         struct coda_aux_buf     codebuf;
         struct coda_aux_buf     workbuf;
+        struct gen_pool         *iram_pool;
+        long unsigned int       iram_vaddr;
         long unsigned int       iram_paddr;
+        unsigned long           iram_size;
 
         spinlock_t              irqlock;
         struct mutex            dev_mutex;
@@ -1926,6 +1931,9 @@ static int coda_probe(struct platform_device *pdev)
         const struct of_device_id *of_id =
                         of_match_device(of_match_ptr(coda_dt_ids), &pdev->dev);
         const struct platform_device_id *pdev_id;
+        struct coda_platform_data *pdata = pdev->dev.platform_data;
+        struct device_node *np = pdev->dev.of_node;
+        struct gen_pool *pool;
         struct coda_dev *dev;
         struct resource *res;
         int ret, irq;
@@ -1988,6 +1996,16 @@ static int coda_probe(struct platform_device *pdev)
                 return -ENOENT;
         }
 
+        /* Get IRAM pool from device tree or platform data */
+        pool = of_get_named_gen_pool(np, "iram", 0);
+        if (!pool && pdata)
+                pool = dev_get_gen_pool(pdata->iram_dev);
+        if (!pool) {
+                dev_err(&pdev->dev, "iram pool not available\n");
+                return -ENOMEM;
+        }
+        dev->iram_pool = pool;
+
         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
         if (ret)
                 return ret;
@@ -2022,18 +2040,17 @@ static int coda_probe(struct platform_device *pdev)
                 return -ENOMEM;
         }
 
-        if (dev->devtype->product == CODA_DX6) {
-                dev->iram_paddr = 0xffff4c00;
-        } else {
-                void __iomem *iram_vaddr;
-
-                iram_vaddr = iram_alloc(CODA7_IRAM_SIZE,
-                                        &dev->iram_paddr);
-                if (!iram_vaddr) {
-                        dev_err(&pdev->dev, "unable to alloc iram\n");
-                        return -ENOMEM;
-                }
+        if (dev->devtype->product == CODA_DX6)
+                dev->iram_size = CODADX6_IRAM_SIZE;
+        else
+                dev->iram_size = CODA7_IRAM_SIZE;
+        dev->iram_vaddr = gen_pool_alloc(dev->iram_pool, dev->iram_size);
+        if (!dev->iram_vaddr) {
+                dev_err(&pdev->dev, "unable to alloc iram\n");
+                return -ENOMEM;
         }
+        dev->iram_paddr = gen_pool_virt_to_phys(dev->iram_pool,
+                                                dev->iram_vaddr);
 
         platform_set_drvdata(pdev, dev);
 
@@ -2050,8 +2067,8 @@ static int coda_remove(struct platform_device *pdev)
         if (dev->alloc_ctx)
                 vb2_dma_contig_cleanup_ctx(dev->alloc_ctx);
         v4l2_device_unregister(&dev->v4l2_dev);
-        if (dev->iram_paddr)
-                iram_free(dev->iram_paddr, CODA7_IRAM_SIZE);
+        if (dev->iram_vaddr)
+                gen_pool_free(dev->iram_pool, dev->iram_vaddr, dev->iram_size);
         if (dev->codebuf.vaddr)
                 dma_free_coherent(&pdev->dev, dev->codebuf.size,
                                   &dev->codebuf.vaddr, dev->codebuf.paddr);
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index e29e7980a359..3659d00efdc5 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -518,6 +518,15 @@ config LATTICE_ECP3_CONFIG
 
           If unsure, say N.
 
+config SRAM
+        bool "Generic on-chip SRAM driver"
+        depends on HAS_IOMEM
+        select GENERIC_ALLOCATOR
+        help
+          This driver allows you to declare a memory region to be managed by
+          the genalloc API. It is supposed to be used for small on-chip SRAM
+          areas found on many SoCs.
+
 source "drivers/misc/c2port/Kconfig"
 source "drivers/misc/eeprom/Kconfig"
 source "drivers/misc/cb710/Kconfig"
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 865cbc6a7ae1..c235d5b68311 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -52,3 +52,4 @@ obj-$(CONFIG_ALTERA_STAPL)	+=altera-stapl/
 obj-$(CONFIG_INTEL_MEI)         += mei/
 obj-$(CONFIG_VMWARE_VMCI)       += vmw_vmci/
 obj-$(CONFIG_LATTICE_ECP3_CONFIG)       += lattice-ecp3-config.o
+obj-$(CONFIG_SRAM)              += sram.o
diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c
new file mode 100644
index 000000000000..437192e43006
--- /dev/null
+++ b/drivers/misc/sram.c
@@ -0,0 +1,121 @@
+/*
+ * Generic on-chip SRAM allocation driver
+ *
+ * Copyright (C) 2012 Philipp Zabel, Pengutronix
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301, USA.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/genalloc.h>
+
+#define SRAM_GRANULARITY        32
+
+struct sram_dev {
+        struct gen_pool *pool;
+        struct clk *clk;
+};
+
+static int sram_probe(struct platform_device *pdev)
+{
+        void __iomem *virt_base;
+        struct sram_dev *sram;
+        struct resource *res;
+        unsigned long size;
+        int ret;
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res)
+                return -EINVAL;
+
+        size = resource_size(res);
+
+        virt_base = devm_request_and_ioremap(&pdev->dev, res);
+        if (!virt_base)
+                return -EADDRNOTAVAIL;
+
+        sram = devm_kzalloc(&pdev->dev, sizeof(*sram), GFP_KERNEL);
+        if (!sram)
+                return -ENOMEM;
+
+        sram->clk = devm_clk_get(&pdev->dev, NULL);
+        if (IS_ERR(sram->clk))
+                sram->clk = NULL;
+        else
+                clk_prepare_enable(sram->clk);
+
+        sram->pool = devm_gen_pool_create(&pdev->dev, ilog2(SRAM_GRANULARITY), -1);
+        if (!sram->pool)
+                return -ENOMEM;
+
+        ret = gen_pool_add_virt(sram->pool, (unsigned long)virt_base,
+                                res->start, size, -1);
+        if (ret < 0) {
+                gen_pool_destroy(sram->pool);
+                return ret;
+        }
+
+        platform_set_drvdata(pdev, sram);
+
+        dev_dbg(&pdev->dev, "SRAM pool: %ld KiB @ 0x%p\n", size / 1024, virt_base);
+
+        return 0;
+}
+
+static int sram_remove(struct platform_device *pdev)
+{
+        struct sram_dev *sram = platform_get_drvdata(pdev);
+
+        if (gen_pool_avail(sram->pool) < gen_pool_size(sram->pool))
+                dev_dbg(&pdev->dev, "removed while SRAM allocated\n");
+
+        gen_pool_destroy(sram->pool);
+
+        if (sram->clk)
+                clk_disable_unprepare(sram->clk);
+
+        return 0;
+}
+
+#ifdef CONFIG_OF
+static struct of_device_id sram_dt_ids[] = {
+        { .compatible = "mmio-sram" },
+        {}
+};
+#endif
+
+static struct platform_driver sram_driver = {
+        .driver = {
+                .name = "sram",
+                .of_match_table = of_match_ptr(sram_dt_ids),
+        },
+        .probe = sram_probe,
+        .remove = sram_remove,
+};
+
+static int __init sram_init(void)
+{
+        return platform_driver_register(&sram_driver);
+}
+
+postcore_initcall(sram_init);
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c
index 08a3cf2a7610..9290bb51a06a 100644
--- a/drivers/mmc/core/core.c
+++ b/drivers/mmc/core/core.c
@@ -120,8 +120,8 @@ static void mmc_should_fail_request(struct mmc_host *host,
             !should_fail(&host->fail_mmc_request, data->blksz * data->blocks))
                 return;
 
-        data->error = data_errors[random32() % ARRAY_SIZE(data_errors)];
-        data->bytes_xfered = (random32() % (data->bytes_xfered >> 9)) << 9;
+        data->error = data_errors[prandom_u32() % ARRAY_SIZE(data_errors)];
+        data->bytes_xfered = (prandom_u32() % (data->bytes_xfered >> 9)) << 9;
 }
 
 #else /* CONFIG_FAIL_MMC_REQUEST */
diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c
index a59684b5fc68..7861f1119b7d 100644
--- a/drivers/rpmsg/virtio_rpmsg_bus.c
+++ b/drivers/rpmsg/virtio_rpmsg_bus.c
@@ -951,8 +951,10 @@ static int rpmsg_probe(struct virtio_device *vdev)
         bufs_va = dma_alloc_coherent(vdev->dev.parent->parent,
                                 RPMSG_TOTAL_BUF_SPACE,
                                 &vrp->bufs_dma, GFP_KERNEL);
-        if (!bufs_va)
+        if (!bufs_va) {
+                err = -ENOMEM;
                 goto vqs_del;
+        }
 
         dev_dbg(&vdev->dev, "buffers: va %p, dma 0x%llx\n", bufs_va,
                                         (unsigned long long)vrp->bufs_dma);
diff --git a/drivers/rtc/class.c b/drivers/rtc/class.c
index 9b742d3ffb94..66385402d20e 100644
--- a/drivers/rtc/class.c
+++ b/drivers/rtc/class.c
@@ -259,6 +259,76 @@ void rtc_device_unregister(struct rtc_device *rtc)
 }
 EXPORT_SYMBOL_GPL(rtc_device_unregister);
 
+static void devm_rtc_device_release(struct device *dev, void *res)
+{
+        struct rtc_device *rtc = *(struct rtc_device **)res;
+
+        rtc_device_unregister(rtc);
+}
+
+static int devm_rtc_device_match(struct device *dev, void *res, void *data)
+{
+        struct rtc **r = res;
+
+        return *r == data;
+}
+
+/**
+ * devm_rtc_device_register - resource managed rtc_device_register()
+ * @dev: the device to register
+ * @name: the name of the device
+ * @ops: the rtc operations structure
+ * @owner: the module owner
+ *
+ * @return a struct rtc on success, or an ERR_PTR on error
+ *
+ * Managed rtc_device_register(). The rtc_device returned from this function
+ * are automatically freed on driver detach. See rtc_device_register()
+ * for more information.
+ */
+
+struct rtc_device *devm_rtc_device_register(struct device *dev,
+                                        const char *name,
+                                        const struct rtc_class_ops *ops,
+                                        struct module *owner)
+{
+        struct rtc_device **ptr, *rtc;
+
+        ptr = devres_alloc(devm_rtc_device_release, sizeof(*ptr), GFP_KERNEL);
+        if (!ptr)
+                return ERR_PTR(-ENOMEM);
+
+        rtc = rtc_device_register(name, dev, ops, owner);
+        if (!IS_ERR(rtc)) {
+                *ptr = rtc;
+                devres_add(dev, ptr);
+        } else {
+                devres_free(ptr);
+        }
+
+        return rtc;
+}
+EXPORT_SYMBOL_GPL(devm_rtc_device_register);
+
+/**
+ * devm_rtc_device_unregister - resource managed devm_rtc_device_unregister()
+ * @dev: the device to unregister
+ * @rtc: the RTC class device to unregister
+ *
+ * Deallocated a rtc allocated with devm_rtc_device_register(). Normally this
+ * function will not need to be called and the resource management code will
+ * ensure that the resource is freed.
+ */
+void devm_rtc_device_unregister(struct device *dev, struct rtc_device *rtc)
+{
+        int rc;
+
+        rc = devres_release(dev, devm_rtc_device_release,
+                                devm_rtc_device_match, rtc);
+        WARN_ON(rc);
+}
+EXPORT_SYMBOL_GPL(devm_rtc_device_unregister);
+
 static int __init rtc_init(void)
 {
         rtc_class = class_create(THIS_MODULE, "rtc");
diff --git a/drivers/rtc/rtc-88pm80x.c b/drivers/rtc/rtc-88pm80x.c
index 63b17ebe90e8..f3742f364eb8 100644
--- a/drivers/rtc/rtc-88pm80x.c
+++ b/drivers/rtc/rtc-88pm80x.c
@@ -234,7 +234,7 @@ static const struct rtc_class_ops pm80x_rtc_ops = {
         .alarm_irq_enable = pm80x_rtc_alarm_irq_enable,
 };
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int pm80x_rtc_suspend(struct device *dev)
 {
         return pm80x_dev_suspend(dev);
@@ -312,7 +312,7 @@ static int pm80x_rtc_probe(struct platform_device *pdev)
         }
         rtc_tm_to_time(&tm, &ticks);
 
-        info->rtc_dev = rtc_device_register("88pm80x-rtc", &pdev->dev,
+        info->rtc_dev = devm_rtc_device_register(&pdev->dev, "88pm80x-rtc",
                                             &pm80x_rtc_ops, THIS_MODULE);
         if (IS_ERR(info->rtc_dev)) {
                 ret = PTR_ERR(info->rtc_dev);
@@ -346,7 +346,6 @@ static int pm80x_rtc_remove(struct platform_device *pdev)
 {
         struct pm80x_rtc_info *info = platform_get_drvdata(pdev);
         platform_set_drvdata(pdev, NULL);
-        rtc_device_unregister(info->rtc_dev);
         pm80x_free_irq(info->chip, info->irq, info);
         return 0;
 }
diff --git a/drivers/rtc/rtc-88pm860x.c b/drivers/rtc/rtc-88pm860x.c
index f663746f4603..0f2b91bfee37 100644
--- a/drivers/rtc/rtc-88pm860x.c
+++ b/drivers/rtc/rtc-88pm860x.c
@@ -318,14 +318,14 @@ static int pm860x_rtc_probe(struct platform_device *pdev)
 
         pdata = pdev->dev.platform_data;
 
-        info = kzalloc(sizeof(struct pm860x_rtc_info), GFP_KERNEL);
+        info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_rtc_info),
+                            GFP_KERNEL);
         if (!info)
                 return -ENOMEM;
         info->irq = platform_get_irq(pdev, 0);
         if (info->irq < 0) {
                 dev_err(&pdev->dev, "No IRQ resource!\n");
-                ret = -EINVAL;
-                goto out;
+                return info->irq;
         }
 
         info->chip = chip;
@@ -333,12 +333,13 @@ static int pm860x_rtc_probe(struct platform_device *pdev)
         info->dev = &pdev->dev;
         dev_set_drvdata(&pdev->dev, info);
 
-        ret = request_threaded_irq(info->irq, NULL, rtc_update_handler,
-                                   IRQF_ONESHOT, "rtc", info);
+        ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
+                                        rtc_update_handler, IRQF_ONESHOT, "rtc",
+                                        info);
         if (ret < 0) {
                 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
                         info->irq, ret);
-                goto out;
+                return ret;
         }
 
         /* set addresses of 32-bit base value for RTC time */
@@ -350,7 +351,7 @@ static int pm860x_rtc_probe(struct platform_device *pdev)
         ret = pm860x_rtc_read_time(&pdev->dev, &tm);
         if (ret < 0) {
                 dev_err(&pdev->dev, "Failed to read initial time.\n");
-                goto out_rtc;
+                return ret;
         }
         if ((tm.tm_year < 70) || (tm.tm_year > 138)) {
                 tm.tm_year = 70;
@@ -362,7 +363,7 @@ static int pm860x_rtc_probe(struct platform_device *pdev)
                 ret = pm860x_rtc_set_time(&pdev->dev, &tm);
                 if (ret < 0) {
                         dev_err(&pdev->dev, "Failed to set initial time.\n");
-                        goto out_rtc;
+                        return ret;
                 }
         }
         rtc_tm_to_time(&tm, &ticks);
@@ -373,12 +374,12 @@ static int pm860x_rtc_probe(struct platform_device *pdev)
                 }
         }
 
-        info->rtc_dev = rtc_device_register("88pm860x-rtc", &pdev->dev,
+        info->rtc_dev = devm_rtc_device_register(&pdev->dev, "88pm860x-rtc",
                                             &pm860x_rtc_ops, THIS_MODULE);
         ret = PTR_ERR(info->rtc_dev);
         if (IS_ERR(info->rtc_dev)) {
                 dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
-                goto out_rtc;
+                return ret;
         }
 
         /*
@@ -405,11 +406,6 @@ static int pm860x_rtc_probe(struct platform_device *pdev)
         device_init_wakeup(&pdev->dev, 1);
 
         return 0;
-out_rtc:
-        free_irq(info->irq, info);
-out:
-        kfree(info);
-        return ret;
 }
 
 static int pm860x_rtc_remove(struct platform_device *pdev)
@@ -423,9 +419,6 @@ static int pm860x_rtc_remove(struct platform_device *pdev)
 #endif  /* VRTC_CALIBRATION */
 
         platform_set_drvdata(pdev, NULL);
-        rtc_device_unregister(info->rtc_dev);
-        free_irq(info->irq, info);
-        kfree(info);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ab3100.c b/drivers/rtc/rtc-ab3100.c
index 261a07e0fb24..47a4f2c4d30e 100644
--- a/drivers/rtc/rtc-ab3100.c
+++ b/drivers/rtc/rtc-ab3100.c
@@ -229,8 +229,8 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev)
                 /* Ignore any error on this write */
         }
 
-        rtc = rtc_device_register("ab3100-rtc", &pdev->dev, &ab3100_rtc_ops,
-                                  THIS_MODULE);
+        rtc = devm_rtc_device_register(&pdev->dev, "ab3100-rtc",
+                                        &ab3100_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
                 err = PTR_ERR(rtc);
                 return err;
@@ -242,9 +242,6 @@ static int __init ab3100_rtc_probe(struct platform_device *pdev)
 
 static int __exit ab3100_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtc);
         platform_set_drvdata(pdev, NULL);
         return 0;
 }
@@ -257,19 +254,7 @@ static struct platform_driver ab3100_rtc_driver = {
         .remove  = __exit_p(ab3100_rtc_remove),
 };
 
-static int __init ab3100_rtc_init(void)
-{
-        return platform_driver_probe(&ab3100_rtc_driver,
-                                     ab3100_rtc_probe);
-}
-
-static void __exit ab3100_rtc_exit(void)
-{
-        platform_driver_unregister(&ab3100_rtc_driver);
-}
-
-module_init(ab3100_rtc_init);
-module_exit(ab3100_rtc_exit);
+module_platform_driver_probe(ab3100_rtc_driver, ab3100_rtc_probe);
 
 MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
 MODULE_DESCRIPTION("AB3100 RTC Driver");
diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
index 57cde2b061e6..63cfa314a39f 100644
--- a/drivers/rtc/rtc-ab8500.c
+++ b/drivers/rtc/rtc-ab8500.c
@@ -422,20 +422,19 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, true);
 
-        rtc = rtc_device_register("ab8500-rtc", &pdev->dev, &ab8500_rtc_ops,
-                        THIS_MODULE);
+        rtc = devm_rtc_device_register(&pdev->dev, "ab8500-rtc",
+                                        &ab8500_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
                 dev_err(&pdev->dev, "Registration failed\n");
                 err = PTR_ERR(rtc);
                 return err;
         }
 
-        err = request_threaded_irq(irq, NULL, rtc_alarm_handler,
-                IRQF_NO_SUSPEND | IRQF_ONESHOT, "ab8500-rtc", rtc);
-        if (err < 0) {
-                rtc_device_unregister(rtc);
+        err = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+                        rtc_alarm_handler, IRQF_NO_SUSPEND | IRQF_ONESHOT,
+                        "ab8500-rtc", rtc);
+        if (err < 0)
                 return err;
-        }
 
         platform_set_drvdata(pdev, rtc);
 
@@ -450,13 +449,8 @@ static int ab8500_rtc_probe(struct platform_device *pdev)
 
 static int ab8500_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(pdev);
-        int irq = platform_get_irq_byname(pdev, "ALARM");
-
         ab8500_sysfs_rtc_unregister(&pdev->dev);
 
-        free_irq(irq, rtc);
-        rtc_device_unregister(rtc);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
diff --git a/drivers/rtc/rtc-at32ap700x.c b/drivers/rtc/rtc-at32ap700x.c
index 8dd08305aae1..f47fbb5eee8b 100644
--- a/drivers/rtc/rtc-at32ap700x.c
+++ b/drivers/rtc/rtc-at32ap700x.c
@@ -202,7 +202,8 @@ static int __init at32_rtc_probe(struct platform_device *pdev)
         int irq;
         int ret;
 
-        rtc = kzalloc(sizeof(struct rtc_at32ap700x), GFP_KERNEL);
+        rtc = devm_kzalloc(&pdev->dev, sizeof(struct rtc_at32ap700x),
+                           GFP_KERNEL);
         if (!rtc) {
                 dev_dbg(&pdev->dev, "out of memory\n");
                 return -ENOMEM;
@@ -223,7 +224,7 @@ static int __init at32_rtc_probe(struct platform_device *pdev)
         }
 
         rtc->irq = irq;
-        rtc->regs = ioremap(regs->start, resource_size(regs));
+        rtc->regs = devm_ioremap(&pdev->dev, regs->start, resource_size(regs));
         if (!rtc->regs) {
                 ret = -ENOMEM;
                 dev_dbg(&pdev->dev, "could not map I/O memory\n");
@@ -244,20 +245,21 @@ static int __init at32_rtc_probe(struct platform_device *pdev)
                                 | RTC_BIT(CTRL_EN));
         }
 
-        ret = request_irq(irq, at32_rtc_interrupt, IRQF_SHARED, "rtc", rtc);
+        ret = devm_request_irq(&pdev->dev, irq, at32_rtc_interrupt, IRQF_SHARED,
+                                "rtc", rtc);
         if (ret) {
                 dev_dbg(&pdev->dev, "could not request irq %d\n", irq);
-                goto out_iounmap;
+                goto out;
         }
 
         platform_set_drvdata(pdev, rtc);
 
-        rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                 &at32_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtc)) {
                 dev_dbg(&pdev->dev, "could not register rtc device\n");
                 ret = PTR_ERR(rtc->rtc);
-                goto out_free_irq;
+                goto out;
         }
 
         device_init_wakeup(&pdev->dev, 1);
@@ -267,26 +269,15 @@ static int __init at32_rtc_probe(struct platform_device *pdev)
 
         return 0;
 
-out_free_irq:
-        platform_set_drvdata(pdev, NULL);
-        free_irq(irq, rtc);
-out_iounmap:
-        iounmap(rtc->regs);
 out:
-        kfree(rtc);
+        platform_set_drvdata(pdev, NULL);
         return ret;
 }
 
 static int __exit at32_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_at32ap700x *rtc = platform_get_drvdata(pdev);
-
         device_init_wakeup(&pdev->dev, 0);
 
-        free_irq(rtc->irq, rtc);
-        iounmap(rtc->regs);
-        rtc_device_unregister(rtc->rtc);
-        kfree(rtc);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
@@ -302,17 +293,7 @@ static struct platform_driver at32_rtc_driver = {
         },
 };
 
-static int __init at32_rtc_init(void)
-{
-        return platform_driver_probe(&at32_rtc_driver, at32_rtc_probe);
-}
-module_init(at32_rtc_init);
-
-static void __exit at32_rtc_exit(void)
-{
-        platform_driver_unregister(&at32_rtc_driver);
-}
-module_exit(at32_rtc_exit);
+module_platform_driver_probe(at32_rtc_driver, at32_rtc_probe);
 
 MODULE_AUTHOR("Hans-Christian Egtvedt <hcegtvedt@atmel.com>");
 MODULE_DESCRIPTION("Real time clock for AVR32 AT32AP700x");
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index 434ebc3a99dc..0eab77b22340 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -28,6 +28,8 @@
 #include <linux/ioctl.h>
 #include <linux/completion.h>
 #include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
 
 #include <asm/uaccess.h>
 
@@ -297,7 +299,7 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
                                 "at91_rtc", pdev);
         if (ret) {
                 dev_err(&pdev->dev, "IRQ %d already in use.\n", irq);
-                return ret;
+                goto err_unmap;
         }
 
         /* cpu init code should really have flagged this device as
@@ -309,13 +311,20 @@ static int __init at91_rtc_probe(struct platform_device *pdev)
         rtc = rtc_device_register(pdev->name, &pdev->dev,
                                 &at91_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
-                free_irq(irq, pdev);
-                return PTR_ERR(rtc);
+                ret = PTR_ERR(rtc);
+                goto err_free_irq;
         }
         platform_set_drvdata(pdev, rtc);
 
         dev_info(&pdev->dev, "AT91 Real Time Clock driver.\n");
         return 0;
+
+err_free_irq:
+        free_irq(irq, pdev);
+err_unmap:
+        iounmap(at91_rtc_regs);
+
+        return ret;
 }
 
 /*
@@ -332,12 +341,13 @@ static int __exit at91_rtc_remove(struct platform_device *pdev)
         free_irq(irq, pdev);
 
         rtc_device_unregister(rtc);
+        iounmap(at91_rtc_regs);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 
 /* AT91RM9200 RTC Power management control */
 
@@ -369,39 +379,27 @@ static int at91_rtc_resume(struct device *dev)
         }
         return 0;
 }
+#endif
 
-static const struct dev_pm_ops at91_rtc_pm = {
-        .suspend =      at91_rtc_suspend,
-        .resume =       at91_rtc_resume,
-};
-
-#define at91_rtc_pm_ptr &at91_rtc_pm
+static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
 
-#else
-#define at91_rtc_pm_ptr NULL
-#endif
+static const struct of_device_id at91_rtc_dt_ids[] = {
+        { .compatible = "atmel,at91rm9200-rtc" },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, at91_rtc_dt_ids);
 
 static struct platform_driver at91_rtc_driver = {
         .remove         = __exit_p(at91_rtc_remove),
         .driver         = {
                 .name   = "at91_rtc",
                 .owner  = THIS_MODULE,
-                .pm     = at91_rtc_pm_ptr,
+                .pm     = &at91_rtc_pm_ops,
+                .of_match_table = of_match_ptr(at91_rtc_dt_ids),
         },
 };
 
-static int __init at91_rtc_init(void)
-{
-        return platform_driver_probe(&at91_rtc_driver, at91_rtc_probe);
-}
-
-static void __exit at91_rtc_exit(void)
-{
-        platform_driver_unregister(&at91_rtc_driver);
-}
-
-module_init(at91_rtc_init);
-module_exit(at91_rtc_exit);
+module_platform_driver_probe(at91_rtc_driver, at91_rtc_probe);
 
 MODULE_AUTHOR("Rick Bronson");
 MODULE_DESCRIPTION("RTC driver for Atmel AT91RM9200");
diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 39cfd2ee0042..b60a34cb145a 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -20,6 +20,7 @@
 #include <linux/ioctl.h>
 #include <linux/slab.h>
 #include <linux/platform_data/atmel.h>
+#include <linux/io.h>
 
 #include <mach/at91_rtt.h>
 #include <mach/cpu.h>
@@ -309,7 +310,7 @@ static int at91_rtc_probe(struct platform_device *pdev)
                 return irq;
         }
 
-        rtc = kzalloc(sizeof *rtc, GFP_KERNEL);
+        rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
         if (!rtc)
                 return -ENOMEM;
 
@@ -320,18 +321,19 @@ static int at91_rtc_probe(struct platform_device *pdev)
                 device_init_wakeup(&pdev->dev, 1);
 
         platform_set_drvdata(pdev, rtc);
-        rtc->rtt = ioremap(r->start, resource_size(r));
+        rtc->rtt = devm_ioremap(&pdev->dev, r->start, resource_size(r));
         if (!rtc->rtt) {
                 dev_err(&pdev->dev, "failed to map registers, aborting.\n");
                 ret = -ENOMEM;
                 goto fail;
         }
 
-        rtc->gpbr = ioremap(r_gpbr->start, resource_size(r_gpbr));
+        rtc->gpbr = devm_ioremap(&pdev->dev, r_gpbr->start,
+                                resource_size(r_gpbr));
         if (!rtc->gpbr) {
                 dev_err(&pdev->dev, "failed to map gpbr registers, aborting.\n");
                 ret = -ENOMEM;
-                goto fail_gpbr;
+                goto fail;
         }
 
         mr = rtt_readl(rtc, MR);
@@ -346,20 +348,19 @@ static int at91_rtc_probe(struct platform_device *pdev)
         mr &= ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
         rtt_writel(rtc, MR, mr);
 
-        rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev,
-                                &at91_rtc_ops, THIS_MODULE);
+        rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name,
+                                        &at91_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtcdev)) {
                 ret = PTR_ERR(rtc->rtcdev);
-                goto fail_register;
+                goto fail;
         }
 
         /* register irq handler after we know what name we'll use */
-        ret = request_irq(rtc->irq, at91_rtc_interrupt, IRQF_SHARED,
-                                dev_name(&rtc->rtcdev->dev), rtc);
+        ret = devm_request_irq(&pdev->dev, rtc->irq, at91_rtc_interrupt,
+                                IRQF_SHARED, dev_name(&rtc->rtcdev->dev), rtc);
         if (ret) {
                 dev_dbg(&pdev->dev, "can't share IRQ %d?\n", rtc->irq);
-                rtc_device_unregister(rtc->rtcdev);
-                goto fail_register;
+                goto fail;
         }
 
         /* NOTE:  sam9260 rev A silicon has a ROM bug which resets the
@@ -374,13 +375,8 @@ static int at91_rtc_probe(struct platform_device *pdev)
 
         return 0;
 
-fail_register:
-        iounmap(rtc->gpbr);
-fail_gpbr:
-        iounmap(rtc->rtt);
 fail:
         platform_set_drvdata(pdev, NULL);
-        kfree(rtc);
         return ret;
 }
 
@@ -394,14 +390,8 @@ static int at91_rtc_remove(struct platform_device *pdev)
 
         /* disable all interrupts */
         rtt_writel(rtc, MR, mr & ~(AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN));
-        free_irq(rtc->irq, rtc);
-
-        rtc_device_unregister(rtc->rtcdev);
 
-        iounmap(rtc->gpbr);
-        iounmap(rtc->rtt);
         platform_set_drvdata(pdev, NULL);
-        kfree(rtc);
         return 0;
 }
 
@@ -414,14 +404,13 @@ static void at91_rtc_shutdown(struct platform_device *pdev)
         rtt_writel(rtc, MR, mr & ~rtc->imr);
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 
 /* AT91SAM9 RTC Power management control */
 
-static int at91_rtc_suspend(struct platform_device *pdev,
-                                        pm_message_t state)
+static int at91_rtc_suspend(struct device *dev)
 {
-        struct sam9_rtc *rtc = platform_get_drvdata(pdev);
+        struct sam9_rtc *rtc = dev_get_drvdata(dev);
         u32             mr = rtt_readl(rtc, MR);
 
         /*
@@ -430,7 +419,7 @@ static int at91_rtc_suspend(struct platform_device *pdev,
          */
         rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
         if (rtc->imr) {
-                if (device_may_wakeup(&pdev->dev) && (mr & AT91_RTT_ALMIEN)) {
+                if (device_may_wakeup(dev) && (mr & AT91_RTT_ALMIEN)) {
                         enable_irq_wake(rtc->irq);
                         /* don't let RTTINC cause wakeups */
                         if (mr & AT91_RTT_RTTINCIEN)
@@ -442,13 +431,13 @@ static int at91_rtc_suspend(struct platform_device *pdev,
         return 0;
 }
 
-static int at91_rtc_resume(struct platform_device *pdev)
+static int at91_rtc_resume(struct device *dev)
 {
-        struct sam9_rtc *rtc = platform_get_drvdata(pdev);
+        struct sam9_rtc *rtc = dev_get_drvdata(dev);
         u32             mr;
 
         if (rtc->imr) {
-                if (device_may_wakeup(&pdev->dev))
+                if (device_may_wakeup(dev))
                         disable_irq_wake(rtc->irq);
                 mr = rtt_readl(rtc, MR);
                 rtt_writel(rtc, MR, mr | rtc->imr);
@@ -456,20 +445,18 @@ static int at91_rtc_resume(struct platform_device *pdev)
 
         return 0;
 }
-#else
-#define at91_rtc_suspend        NULL
-#define at91_rtc_resume         NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
+
 static struct platform_driver at91_rtc_driver = {
         .probe          = at91_rtc_probe,
         .remove         = at91_rtc_remove,
         .shutdown       = at91_rtc_shutdown,
-        .suspend        = at91_rtc_suspend,
-        .resume         = at91_rtc_resume,
         .driver         = {
                 .name   = "rtc-at91sam9",
                 .owner  = THIS_MODULE,
+                .pm     = &at91_rtc_pm_ops,
         },
 };
 
diff --git a/drivers/rtc/rtc-au1xxx.c b/drivers/rtc/rtc-au1xxx.c
index b309da4ec745..7995abc391fc 100644
--- a/drivers/rtc/rtc-au1xxx.c
+++ b/drivers/rtc/rtc-au1xxx.c
@@ -101,7 +101,7 @@ static int au1xtoy_rtc_probe(struct platform_device *pdev)
         while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_C0S)
                 msleep(1);
 
-        rtcdev = rtc_device_register("rtc-au1xxx", &pdev->dev,
+        rtcdev = devm_rtc_device_register(&pdev->dev, "rtc-au1xxx",
                                      &au1xtoy_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtcdev)) {
                 ret = PTR_ERR(rtcdev);
@@ -118,9 +118,6 @@ out_err:
 
 static int au1xtoy_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtcdev = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtcdev);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
@@ -134,18 +131,7 @@ static struct platform_driver au1xrtc_driver = {
         .remove         = au1xtoy_rtc_remove,
 };
 
-static int __init au1xtoy_rtc_init(void)
-{
-        return platform_driver_probe(&au1xrtc_driver, au1xtoy_rtc_probe);
-}
-
-static void __exit au1xtoy_rtc_exit(void)
-{
-        platform_driver_unregister(&au1xrtc_driver);
-}
-
-module_init(au1xtoy_rtc_init);
-module_exit(au1xtoy_rtc_exit);
+module_platform_driver_probe(au1xrtc_driver, au1xtoy_rtc_probe);
 
 MODULE_DESCRIPTION("Au1xxx TOY-counter-based RTC driver");
 MODULE_AUTHOR("Manuel Lauss <manuel.lauss@gmail.com>");
diff --git a/drivers/rtc/rtc-bfin.c b/drivers/rtc/rtc-bfin.c
index 4ec614b0954d..ad44ec5dc29a 100644
--- a/drivers/rtc/rtc-bfin.c
+++ b/drivers/rtc/rtc-bfin.c
@@ -352,14 +352,14 @@ static int bfin_rtc_probe(struct platform_device *pdev)
         dev_dbg_stamp(dev);
 
         /* Allocate memory for our RTC struct */
-        rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
+        rtc = devm_kzalloc(dev, sizeof(*rtc), GFP_KERNEL);
         if (unlikely(!rtc))
                 return -ENOMEM;
         platform_set_drvdata(pdev, rtc);
         device_init_wakeup(dev, 1);
 
         /* Register our RTC with the RTC framework */
-        rtc->rtc_dev = rtc_device_register(pdev->name, dev, &bfin_rtc_ops,
+        rtc->rtc_dev = devm_rtc_device_register(dev, pdev->name, &bfin_rtc_ops,
                                                 THIS_MODULE);
         if (unlikely(IS_ERR(rtc->rtc_dev))) {
                 ret = PTR_ERR(rtc->rtc_dev);
@@ -367,9 +367,10 @@ static int bfin_rtc_probe(struct platform_device *pdev)
         }
 
         /* Grab the IRQ and init the hardware */
-        ret = request_irq(IRQ_RTC, bfin_rtc_interrupt, 0, pdev->name, dev);
+        ret = devm_request_irq(dev, IRQ_RTC, bfin_rtc_interrupt, 0,
+                                pdev->name, dev);
         if (unlikely(ret))
-                goto err_reg;
+                goto err;
         /* sometimes the bootloader touched things, but the write complete was not
          * enabled, so let's just do a quick timeout here since the IRQ will not fire ...
          */
@@ -381,32 +382,23 @@ static int bfin_rtc_probe(struct platform_device *pdev)
 
         return 0;
 
-err_reg:
-        rtc_device_unregister(rtc->rtc_dev);
 err:
-        kfree(rtc);
         return ret;
 }
 
 static int bfin_rtc_remove(struct platform_device *pdev)
 {
-        struct bfin_rtc *rtc = platform_get_drvdata(pdev);
         struct device *dev = &pdev->dev;
 
         bfin_rtc_reset(dev, 0);
-        free_irq(IRQ_RTC, dev);
-        rtc_device_unregister(rtc->rtc_dev);
         platform_set_drvdata(pdev, NULL);
-        kfree(rtc);
 
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int bfin_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int bfin_rtc_suspend(struct device *dev)
 {
-        struct device *dev = &pdev->dev;
-
         dev_dbg_stamp(dev);
 
         if (device_may_wakeup(dev)) {
@@ -418,10 +410,8 @@ static int bfin_rtc_suspend(struct platform_device *pdev, pm_message_t state)
         return 0;
 }
 
-static int bfin_rtc_resume(struct platform_device *pdev)
+static int bfin_rtc_resume(struct device *dev)
 {
-        struct device *dev = &pdev->dev;
-
         dev_dbg_stamp(dev);
 
         if (device_may_wakeup(dev))
@@ -440,20 +430,18 @@ static int bfin_rtc_resume(struct platform_device *pdev)
 
         return 0;
 }
-#else
-# define bfin_rtc_suspend NULL
-# define bfin_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(bfin_rtc_pm_ops, bfin_rtc_suspend, bfin_rtc_resume);
+
 static struct platform_driver bfin_rtc_driver = {
         .driver         = {
                 .name   = "rtc-bfin",
                 .owner  = THIS_MODULE,
+                .pm     = &bfin_rtc_pm_ops,
         },
         .probe          = bfin_rtc_probe,
         .remove         = bfin_rtc_remove,
-        .suspend        = bfin_rtc_suspend,
-        .resume         = bfin_rtc_resume,
 };
 
 module_platform_driver(bfin_rtc_driver);
diff --git a/drivers/rtc/rtc-bq32k.c b/drivers/rtc/rtc-bq32k.c
index 036cb89f8188..fea78bc713ca 100644
--- a/drivers/rtc/rtc-bq32k.c
+++ b/drivers/rtc/rtc-bq32k.c
@@ -153,7 +153,7 @@ static int bq32k_probe(struct i2c_client *client,
         if (error)
                 return error;
 
-        rtc = rtc_device_register(bq32k_driver.driver.name, &client->dev,
+        rtc = devm_rtc_device_register(&client->dev, bq32k_driver.driver.name,
                                                 &bq32k_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -165,9 +165,6 @@ static int bq32k_probe(struct i2c_client *client,
 
 static int bq32k_remove(struct i2c_client *client)
 {
-        struct rtc_device *rtc = i2c_get_clientdata(client);
-
-        rtc_device_unregister(rtc);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-bq4802.c b/drivers/rtc/rtc-bq4802.c
index 693be71b5b18..af2886784a7b 100644
--- a/drivers/rtc/rtc-bq4802.c
+++ b/drivers/rtc/rtc-bq4802.c
@@ -142,7 +142,7 @@ static const struct rtc_class_ops bq4802_ops = {
 
 static int bq4802_probe(struct platform_device *pdev)
 {
-        struct bq4802 *p = kzalloc(sizeof(*p), GFP_KERNEL);
+        struct bq4802 *p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL);
         int err = -ENOMEM;
 
         if (!p)
@@ -155,54 +155,41 @@ static int bq4802_probe(struct platform_device *pdev)
                 p->r = platform_get_resource(pdev, IORESOURCE_IO, 0);
                 err = -EINVAL;
                 if (!p->r)
-                        goto out_free;
+                        goto out;
         }
         if (p->r->flags & IORESOURCE_IO) {
                 p->ioport = p->r->start;
                 p->read = bq4802_read_io;
                 p->write = bq4802_write_io;
         } else if (p->r->flags & IORESOURCE_MEM) {
-                p->regs = ioremap(p->r->start, resource_size(p->r));
+                p->regs = devm_ioremap(&pdev->dev, p->r->start,
+                                        resource_size(p->r));
                 p->read = bq4802_read_mem;
                 p->write = bq4802_write_mem;
         } else {
                 err = -EINVAL;
-                goto out_free;
+                goto out;
         }
 
         platform_set_drvdata(pdev, p);
 
-        p->rtc = rtc_device_register("bq4802", &pdev->dev,
-                                     &bq4802_ops, THIS_MODULE);
+        p->rtc = devm_rtc_device_register(&pdev->dev, "bq4802",
+                                        &bq4802_ops, THIS_MODULE);
         if (IS_ERR(p->rtc)) {
                 err = PTR_ERR(p->rtc);
-                goto out_iounmap;
+                goto out;
         }
 
         err = 0;
 out:
         return err;
 
-out_iounmap:
-        if (p->r->flags & IORESOURCE_MEM)
-                iounmap(p->regs);
-out_free:
-        kfree(p);
-        goto out;
 }
 
 static int bq4802_remove(struct platform_device *pdev)
 {
-        struct bq4802 *p = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(p->rtc);
-        if (p->r->flags & IORESOURCE_MEM)
-                iounmap(p->regs);
-
         platform_set_drvdata(pdev, NULL);
 
-        kfree(p);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index af97c94e8a3a..cc5bea9c4b1c 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -804,9 +804,8 @@ static int cmos_suspend(struct device *dev)
                         mask = RTC_IRQMASK;
                 tmp &= ~mask;
                 CMOS_WRITE(tmp, RTC_CONTROL);
+                hpet_mask_rtc_irq_bit(mask);
 
-                /* shut down hpet emulation - we don't need it for alarm */
-                hpet_mask_rtc_irq_bit(RTC_PIE|RTC_AIE|RTC_UIE);
                 cmos_checkintr(cmos, tmp);
         }
         spin_unlock_irq(&rtc_lock);
@@ -870,6 +869,7 @@ static int cmos_resume(struct device *dev)
                         rtc_update_irq(cmos->rtc, 1, mask);
                         tmp &= ~RTC_AIE;
                         hpet_mask_rtc_irq_bit(RTC_AIE);
+                        hpet_rtc_timer_init();
                 } while (mask & RTC_AIE);
                 spin_unlock_irq(&rtc_lock);
         }
diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c
index 2d28ec1aa1cd..93c06588ddca 100644
--- a/drivers/rtc/rtc-coh901331.c
+++ b/drivers/rtc/rtc-coh901331.c
@@ -47,7 +47,7 @@ struct coh901331_port {
         u32 physize;
         void __iomem *virtbase;
         int irq;
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
         u32 irqmaskstore;
 #endif
 };
@@ -155,7 +155,6 @@ static int __exit coh901331_remove(struct platform_device *pdev)
         struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
 
         if (rtap) {
-                rtc_device_unregister(rtap->rtc);
                 clk_unprepare(rtap->clk);
                 platform_set_drvdata(pdev, NULL);
         }
@@ -211,8 +210,8 @@ static int __init coh901331_probe(struct platform_device *pdev)
         clk_disable(rtap->clk);
 
         platform_set_drvdata(pdev, rtap);
-        rtap->rtc = rtc_device_register("coh901331", &pdev->dev, &coh901331_ops,
-                                         THIS_MODULE);
+        rtap->rtc = devm_rtc_device_register(&pdev->dev, "coh901331",
+                                        &coh901331_ops, THIS_MODULE);
         if (IS_ERR(rtap->rtc)) {
                 ret = PTR_ERR(rtap->rtc);
                 goto out_no_rtc;
@@ -226,17 +225,17 @@ static int __init coh901331_probe(struct platform_device *pdev)
         return ret;
 }
 
-#ifdef CONFIG_PM
-static int coh901331_suspend(struct platform_device *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int coh901331_suspend(struct device *dev)
 {
-        struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
+        struct coh901331_port *rtap = dev_get_drvdata(dev);
 
         /*
          * If this RTC alarm will be used for waking the system up,
          * don't disable it of course. Else we just disable the alarm
          * and await suspension.
          */
-        if (device_may_wakeup(&pdev->dev)) {
+        if (device_may_wakeup(dev)) {
                 enable_irq_wake(rtap->irq);
         } else {
                 clk_enable(rtap->clk);
@@ -248,12 +247,12 @@ static int coh901331_suspend(struct platform_device *pdev, pm_message_t state)
         return 0;
 }
 
-static int coh901331_resume(struct platform_device *pdev)
+static int coh901331_resume(struct device *dev)
 {
-        struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
+        struct coh901331_port *rtap = dev_get_drvdata(dev);
 
         clk_prepare(rtap->clk);
-        if (device_may_wakeup(&pdev->dev)) {
+        if (device_may_wakeup(dev)) {
                 disable_irq_wake(rtap->irq);
         } else {
                 clk_enable(rtap->clk);
@@ -262,11 +261,10 @@ static int coh901331_resume(struct platform_device *pdev)
         }
         return 0;
 }
-#else
-#define coh901331_suspend NULL
-#define coh901331_resume NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(coh901331_pm_ops, coh901331_suspend, coh901331_resume);
+
 static void coh901331_shutdown(struct platform_device *pdev)
 {
         struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
@@ -280,25 +278,13 @@ static struct platform_driver coh901331_driver = {
         .driver = {
                 .name = "rtc-coh901331",
                 .owner = THIS_MODULE,
+                .pm = &coh901331_pm_ops,
         },
         .remove = __exit_p(coh901331_remove),
-        .suspend = coh901331_suspend,
-        .resume = coh901331_resume,
         .shutdown = coh901331_shutdown,
 };
 
-static int __init coh901331_init(void)
-{
-        return platform_driver_probe(&coh901331_driver, coh901331_probe);
-}
-
-static void __exit coh901331_exit(void)
-{
-        platform_driver_unregister(&coh901331_driver);
-}
-
-module_init(coh901331_init);
-module_exit(coh901331_exit);
+module_platform_driver_probe(coh901331_driver, coh901331_probe);
 
 MODULE_AUTHOR("Linus Walleij <linus.walleij@stericsson.com>");
 MODULE_DESCRIPTION("ST-Ericsson AB COH 901 331 RTC Driver");
diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c
index 969abbad7fe3..7286b279cf2d 100644
--- a/drivers/rtc/rtc-da9052.c
+++ b/drivers/rtc/rtc-da9052.c
@@ -247,7 +247,7 @@ static int da9052_rtc_probe(struct platform_device *pdev)
                 return ret;
         }
 
-        rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                        &da9052_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtc))
                 return PTR_ERR(rtc->rtc);
@@ -257,9 +257,6 @@ static int da9052_rtc_probe(struct platform_device *pdev)
 
 static int da9052_rtc_remove(struct platform_device *pdev)
 {
-        struct da9052_rtc *rtc = pdev->dev.platform_data;
-
-        rtc_device_unregister(rtc->rtc);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
diff --git a/drivers/rtc/rtc-da9055.c b/drivers/rtc/rtc-da9055.c
index 8f0dcfedb83c..73858ca9709a 100644
--- a/drivers/rtc/rtc-da9055.c
+++ b/drivers/rtc/rtc-da9055.c
@@ -294,7 +294,7 @@ static int da9055_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 1);
 
-        rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                         &da9055_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtc)) {
                 ret = PTR_ERR(rtc->rtc);
@@ -317,9 +317,6 @@ err_rtc:
 
 static int da9055_rtc_remove(struct platform_device *pdev)
 {
-        struct da9055_rtc *rtc = pdev->dev.platform_data;
-
-        rtc_device_unregister(rtc->rtc);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
diff --git a/drivers/rtc/rtc-davinci.c b/drivers/rtc/rtc-davinci.c
index 56b73089bb29..a55048c3e26f 100644
--- a/drivers/rtc/rtc-davinci.c
+++ b/drivers/rtc/rtc-davinci.c
@@ -523,7 +523,7 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, davinci_rtc);
 
-        davinci_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        davinci_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                     &davinci_rtc_ops, THIS_MODULE);
         if (IS_ERR(davinci_rtc->rtc)) {
                 ret = PTR_ERR(davinci_rtc->rtc);
@@ -543,7 +543,7 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
                           0, "davinci_rtc", davinci_rtc);
         if (ret < 0) {
                 dev_err(dev, "unable to register davinci RTC interrupt\n");
-                goto fail2;
+                goto fail1;
         }
 
         /* Enable interrupts */
@@ -557,14 +557,12 @@ static int __init davinci_rtc_probe(struct platform_device *pdev)
 
         return 0;
 
-fail2:
-        rtc_device_unregister(davinci_rtc->rtc);
 fail1:
         platform_set_drvdata(pdev, NULL);
         return ret;
 }
 
-static int davinci_rtc_remove(struct platform_device *pdev)
+static int __exit davinci_rtc_remove(struct platform_device *pdev)
 {
         struct davinci_rtc *davinci_rtc = platform_get_drvdata(pdev);
 
@@ -572,8 +570,6 @@ static int davinci_rtc_remove(struct platform_device *pdev)
 
         rtcif_write(davinci_rtc, 0, PRTCIF_INTEN);
 
-        rtc_device_unregister(davinci_rtc->rtc);
-
         platform_set_drvdata(pdev, NULL);
 
         return 0;
@@ -581,24 +577,14 @@ static int davinci_rtc_remove(struct platform_device *pdev)
 
 static struct platform_driver davinci_rtc_driver = {
         .probe          = davinci_rtc_probe,
-        .remove         = davinci_rtc_remove,
+        .remove         = __exit_p(davinci_rtc_remove),
         .driver         = {
                 .name = "rtc_davinci",
                 .owner = THIS_MODULE,
         },
 };
 
-static int __init rtc_init(void)
-{
-        return platform_driver_probe(&davinci_rtc_driver, davinci_rtc_probe);
-}
-module_init(rtc_init);
-
-static void __exit rtc_exit(void)
-{
-        platform_driver_unregister(&davinci_rtc_driver);
-}
-module_exit(rtc_exit);
+module_platform_driver_probe(davinci_rtc_driver, davinci_rtc_probe);
 
 MODULE_AUTHOR("Miguel Aguilar <miguel.aguilar@ridgerun.com>");
 MODULE_DESCRIPTION("Texas Instruments DaVinci PRTC Driver");
diff --git a/drivers/rtc/rtc-dm355evm.c b/drivers/rtc/rtc-dm355evm.c
index b2ed2c94b081..1e1ca63d58a9 100644
--- a/drivers/rtc/rtc-dm355evm.c
+++ b/drivers/rtc/rtc-dm355evm.c
@@ -127,8 +127,8 @@ static int dm355evm_rtc_probe(struct platform_device *pdev)
 {
         struct rtc_device *rtc;
 
-        rtc = rtc_device_register(pdev->name,
-                                  &pdev->dev, &dm355evm_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+                                        &dm355evm_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
                 dev_err(&pdev->dev, "can't register RTC device, err %ld\n",
                         PTR_ERR(rtc));
@@ -141,9 +141,6 @@ static int dm355evm_rtc_probe(struct platform_device *pdev)
 
 static int dm355evm_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtc);
         platform_set_drvdata(pdev, NULL);
         return 0;
 }
diff --git a/drivers/rtc/rtc-ds1216.c b/drivers/rtc/rtc-ds1216.c
index 45cd8c9f5a39..c7702b7269f7 100644
--- a/drivers/rtc/rtc-ds1216.c
+++ b/drivers/rtc/rtc-ds1216.c
@@ -30,8 +30,6 @@ struct ds1216_regs {
 struct ds1216_priv {
         struct rtc_device *rtc;
         void __iomem *ioaddr;
-        size_t size;
-        unsigned long baseaddr;
 };
 
 static const u8 magic[] = {
@@ -144,57 +142,33 @@ static int __init ds1216_rtc_probe(struct platform_device *pdev)
 {
         struct resource *res;
         struct ds1216_priv *priv;
-        int ret = 0;
         u8 dummy[8];
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res)
                 return -ENODEV;
-        priv = kzalloc(sizeof *priv, GFP_KERNEL);
+        priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
         if (!priv)
                 return -ENOMEM;
 
         platform_set_drvdata(pdev, priv);
 
-        priv->size = resource_size(res);
-        if (!request_mem_region(res->start, priv->size, pdev->name)) {
-                ret = -EBUSY;
-                goto out;
-        }
-        priv->baseaddr = res->start;
-        priv->ioaddr = ioremap(priv->baseaddr, priv->size);
-        if (!priv->ioaddr) {
-                ret = -ENOMEM;
-                goto out;
-        }
-        priv->rtc = rtc_device_register("ds1216", &pdev->dev,
-                                  &ds1216_rtc_ops, THIS_MODULE);
-        if (IS_ERR(priv->rtc)) {
-                ret = PTR_ERR(priv->rtc);
-                goto out;
-        }
+        priv->ioaddr = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(priv->ioaddr))
+                return PTR_ERR(priv->ioaddr);
+
+        priv->rtc = devm_rtc_device_register(&pdev->dev, "ds1216",
+                                        &ds1216_rtc_ops, THIS_MODULE);
+        if (IS_ERR(priv->rtc))
+                return PTR_ERR(priv->rtc);
 
         /* dummy read to get clock into a known state */
         ds1216_read(priv->ioaddr, dummy);
         return 0;
-
-out:
-        if (priv->ioaddr)
-                iounmap(priv->ioaddr);
-        if (priv->baseaddr)
-                release_mem_region(priv->baseaddr, priv->size);
-        kfree(priv);
-        return ret;
 }
 
 static int __exit ds1216_rtc_remove(struct platform_device *pdev)
 {
-        struct ds1216_priv *priv = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(priv->rtc);
-        iounmap(priv->ioaddr);
-        release_mem_region(priv->baseaddr, priv->size);
-        kfree(priv);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ds1286.c b/drivers/rtc/rtc-ds1286.c
index d989412a348a..398c96a98fc4 100644
--- a/drivers/rtc/rtc-ds1286.c
+++ b/drivers/rtc/rtc-ds1286.c
@@ -25,8 +25,6 @@
 struct ds1286_priv {
         struct rtc_device *rtc;
         u32 __iomem *rtcregs;
-        size_t size;
-        unsigned long baseaddr;
         spinlock_t lock;
 };
 
@@ -270,7 +268,6 @@ static int ds1286_set_time(struct device *dev, struct rtc_time *tm)
 static int ds1286_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 {
         struct ds1286_priv *priv = dev_get_drvdata(dev);
-        unsigned char cmd;
         unsigned long flags;
 
         /*
@@ -281,7 +278,7 @@ static int ds1286_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
         alm->time.tm_min = ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x7f;
         alm->time.tm_hour = ds1286_rtc_read(priv, RTC_HOURS_ALARM)  & 0x1f;
         alm->time.tm_wday = ds1286_rtc_read(priv, RTC_DAY_ALARM)    & 0x07;
-        cmd = ds1286_rtc_read(priv, RTC_CMD);
+        ds1286_rtc_read(priv, RTC_CMD);
         spin_unlock_irqrestore(&priv->lock, flags);
 
         alm->time.tm_min = bcd2bin(alm->time.tm_min);
@@ -334,56 +331,30 @@ static int ds1286_probe(struct platform_device *pdev)
         struct rtc_device *rtc;
         struct resource *res;
         struct ds1286_priv *priv;
-        int ret = 0;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res)
                 return -ENODEV;
-        priv = kzalloc(sizeof(struct ds1286_priv), GFP_KERNEL);
+        priv = devm_kzalloc(&pdev->dev, sizeof(struct ds1286_priv), GFP_KERNEL);
         if (!priv)
                 return -ENOMEM;
 
-        priv->size = resource_size(res);
-        if (!request_mem_region(res->start, priv->size, pdev->name)) {
-                ret = -EBUSY;
-                goto out;
-        }
-        priv->baseaddr = res->start;
-        priv->rtcregs = ioremap(priv->baseaddr, priv->size);
-        if (!priv->rtcregs) {
-                ret = -ENOMEM;
-                goto out;
-        }
+        priv->rtcregs = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(priv->rtcregs))
+                return PTR_ERR(priv->rtcregs);
+
         spin_lock_init(&priv->lock);
         platform_set_drvdata(pdev, priv);
-        rtc = rtc_device_register("ds1286", &pdev->dev,
-                                  &ds1286_ops, THIS_MODULE);
-        if (IS_ERR(rtc)) {
-                ret = PTR_ERR(rtc);
-                goto out;
-        }
+        rtc = devm_rtc_device_register(&pdev->dev, "ds1286", &ds1286_ops,
+                                        THIS_MODULE);
+        if (IS_ERR(rtc))
+                return PTR_ERR(rtc);
         priv->rtc = rtc;
         return 0;
-
-out:
-        if (priv->rtc)
-                rtc_device_unregister(priv->rtc);
-        if (priv->rtcregs)
-                iounmap(priv->rtcregs);
-        if (priv->baseaddr)
-                release_mem_region(priv->baseaddr, priv->size);
-        kfree(priv);
-        return ret;
 }
 
 static int ds1286_remove(struct platform_device *pdev)
 {
-        struct ds1286_priv *priv = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(priv->rtc);
-        iounmap(priv->rtcregs);
-        release_mem_region(priv->baseaddr, priv->size);
-        kfree(priv);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ds1302.c b/drivers/rtc/rtc-ds1302.c
index fdbcdb289d60..d13954346286 100644
--- a/drivers/rtc/rtc-ds1302.c
+++ b/drivers/rtc/rtc-ds1302.c
@@ -224,7 +224,7 @@ static int __init ds1302_rtc_probe(struct platform_device *pdev)
                 return -ENODEV;
         }
 
-        rtc = rtc_device_register("ds1302", &pdev->dev,
+        rtc = devm_rtc_device_register(&pdev->dev, "ds1302",
                                            &ds1302_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -234,11 +234,8 @@ static int __init ds1302_rtc_probe(struct platform_device *pdev)
         return 0;
 }
 
-static int ds1302_rtc_remove(struct platform_device *pdev)
+static int __exit ds1302_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtc);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
@@ -249,21 +246,10 @@ static struct platform_driver ds1302_platform_driver = {
                 .name   = DRV_NAME,
                 .owner  = THIS_MODULE,
         },
-        .remove         = ds1302_rtc_remove,
+        .remove         = __exit_p(ds1302_rtc_remove),
 };
 
-static int __init ds1302_rtc_init(void)
-{
-        return platform_driver_probe(&ds1302_platform_driver, ds1302_rtc_probe);
-}
-
-static void __exit ds1302_rtc_exit(void)
-{
-        platform_driver_unregister(&ds1302_platform_driver);
-}
-
-module_init(ds1302_rtc_init);
-module_exit(ds1302_rtc_exit);
+module_platform_driver_probe(ds1302_platform_driver, ds1302_rtc_probe);
 
 MODULE_DESCRIPTION("Dallas DS1302 RTC driver");
 MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-ds1305.c b/drivers/rtc/rtc-ds1305.c
index b05a6dc96405..bb5f13f63630 100644
--- a/drivers/rtc/rtc-ds1305.c
+++ b/drivers/rtc/rtc-ds1305.c
@@ -619,7 +619,7 @@ static int ds1305_probe(struct spi_device *spi)
                 return -EINVAL;
 
         /* set up driver data */
-        ds1305 = kzalloc(sizeof *ds1305, GFP_KERNEL);
+        ds1305 = devm_kzalloc(&spi->dev, sizeof(*ds1305), GFP_KERNEL);
         if (!ds1305)
                 return -ENOMEM;
         ds1305->spi = spi;
@@ -632,7 +632,7 @@ static int ds1305_probe(struct spi_device *spi)
         if (status < 0) {
                 dev_dbg(&spi->dev, "can't %s, %d\n",
                                 "read", status);
-                goto fail0;
+                return status;
         }
 
         dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "read", ds1305->ctrl);
@@ -644,8 +644,7 @@ static int ds1305_probe(struct spi_device *spi)
          */
         if ((ds1305->ctrl[0] & 0x38) != 0 || (ds1305->ctrl[1] & 0xfc) != 0) {
                 dev_dbg(&spi->dev, "RTC chip is not present\n");
-                status = -ENODEV;
-                goto fail0;
+                return -ENODEV;
         }
         if (ds1305->ctrl[2] == 0)
                 dev_dbg(&spi->dev, "chip may not be present\n");
@@ -664,7 +663,7 @@ static int ds1305_probe(struct spi_device *spi)
 
                 dev_dbg(&spi->dev, "clear WP --> %d\n", status);
                 if (status < 0)
-                        goto fail0;
+                        return status;
         }
 
         /* on DS1305, maybe start oscillator; like most low power
@@ -718,7 +717,7 @@ static int ds1305_probe(struct spi_device *spi)
                 if (status < 0) {
                         dev_dbg(&spi->dev, "can't %s, %d\n",
                                         "write", status);
-                        goto fail0;
+                        return status;
                 }
 
                 dev_dbg(&spi->dev, "ctrl %s: %3ph\n", "write", ds1305->ctrl);
@@ -730,7 +729,7 @@ static int ds1305_probe(struct spi_device *spi)
                                 &value, sizeof value);
         if (status < 0) {
                 dev_dbg(&spi->dev, "read HOUR --> %d\n", status);
-                goto fail0;
+                return status;
         }
 
         ds1305->hr12 = (DS1305_HR_12 & value) != 0;
@@ -738,12 +737,12 @@ static int ds1305_probe(struct spi_device *spi)
                 dev_dbg(&spi->dev, "AM/PM\n");
 
         /* register RTC ... from here on, ds1305->ctrl needs locking */
-        ds1305->rtc = rtc_device_register("ds1305", &spi->dev,
+        ds1305->rtc = devm_rtc_device_register(&spi->dev, "ds1305",
                         &ds1305_ops, THIS_MODULE);
         if (IS_ERR(ds1305->rtc)) {
                 status = PTR_ERR(ds1305->rtc);
                 dev_dbg(&spi->dev, "register rtc --> %d\n", status);
-                goto fail0;
+                return status;
         }
 
         /* Maybe set up alarm IRQ; be ready to handle it triggering right
@@ -754,12 +753,12 @@ static int ds1305_probe(struct spi_device *spi)
          */
         if (spi->irq) {
                 INIT_WORK(&ds1305->work, ds1305_work);
-                status = request_irq(spi->irq, ds1305_irq,
+                status = devm_request_irq(&spi->dev, spi->irq, ds1305_irq,
                                 0, dev_name(&ds1305->rtc->dev), ds1305);
                 if (status < 0) {
                         dev_dbg(&spi->dev, "request_irq %d --> %d\n",
                                         spi->irq, status);
-                        goto fail1;
+                        return status;
                 }
 
                 device_set_wakeup_capable(&spi->dev, 1);
@@ -769,18 +768,10 @@ static int ds1305_probe(struct spi_device *spi)
         status = sysfs_create_bin_file(&spi->dev.kobj, &nvram);
         if (status < 0) {
                 dev_dbg(&spi->dev, "register nvram --> %d\n", status);
-                goto fail2;
+                return status;
         }
 
         return 0;
-
-fail2:
-        free_irq(spi->irq, ds1305);
-fail1:
-        rtc_device_unregister(ds1305->rtc);
-fail0:
-        kfree(ds1305);
-        return status;
 }
 
 static int ds1305_remove(struct spi_device *spi)
@@ -792,13 +783,11 @@ static int ds1305_remove(struct spi_device *spi)
         /* carefully shut down irq and workqueue, if present */
         if (spi->irq) {
                 set_bit(FLAG_EXITING, &ds1305->flags);
-                free_irq(spi->irq, ds1305);
+                devm_free_irq(&spi->dev, spi->irq, ds1305);
                 cancel_work_sync(&ds1305->work);
         }
 
-        rtc_device_unregister(ds1305->rtc);
         spi_set_drvdata(spi, NULL);
-        kfree(ds1305);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 970a236b147a..b53992ab3090 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c
@@ -4,6 +4,7 @@
  *  Copyright (C) 2005 James Chapman (ds1337 core)
  *  Copyright (C) 2006 David Brownell
  *  Copyright (C) 2009 Matthias Fuchs (rx8025 support)
+ *  Copyright (C) 2012 Bertrand Achard (nvram access fixes)
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 as
@@ -196,7 +197,7 @@ static s32 ds1307_read_block_data_once(const struct i2c_client *client,
 static s32 ds1307_read_block_data(const struct i2c_client *client, u8 command,
                                   u8 length, u8 *values)
 {
-        u8 oldvalues[I2C_SMBUS_BLOCK_MAX];
+        u8 oldvalues[255];
         s32 ret;
         int tries = 0;
 
@@ -222,7 +223,7 @@ static s32 ds1307_read_block_data(const struct i2c_client *client, u8 command,
 static s32 ds1307_write_block_data(const struct i2c_client *client, u8 command,
                                    u8 length, const u8 *values)
 {
-        u8 currvalues[I2C_SMBUS_BLOCK_MAX];
+        u8 currvalues[255];
         int tries = 0;
 
         dev_dbg(&client->dev, "ds1307_write_block_data (length=%d)\n", length);
@@ -250,6 +251,57 @@ static s32 ds1307_write_block_data(const struct i2c_client *client, u8 command,
 
 /*----------------------------------------------------------------------*/
 
+/* These RTC devices are not designed to be connected to a SMbus adapter.
+   SMbus limits block operations length to 32 bytes, whereas it's not
+   limited on I2C buses. As a result, accesses may exceed 32 bytes;
+   in that case, split them into smaller blocks */
+
+static s32 ds1307_native_smbus_write_block_data(const struct i2c_client *client,
+                                u8 command, u8 length, const u8 *values)
+{
+        u8 suboffset = 0;
+
+        if (length <= I2C_SMBUS_BLOCK_MAX)
+                return i2c_smbus_write_i2c_block_data(client,
+                                        command, length, values);
+
+        while (suboffset < length) {
+                s32 retval = i2c_smbus_write_i2c_block_data(client,
+                                command + suboffset,
+                                min(I2C_SMBUS_BLOCK_MAX, length - suboffset),
+                                values + suboffset);
+                if (retval < 0)
+                        return retval;
+
+                suboffset += I2C_SMBUS_BLOCK_MAX;
+        }
+        return length;
+}
+
+static s32 ds1307_native_smbus_read_block_data(const struct i2c_client *client,
+                                u8 command, u8 length, u8 *values)
+{
+        u8 suboffset = 0;
+
+        if (length <= I2C_SMBUS_BLOCK_MAX)
+                return i2c_smbus_read_i2c_block_data(client,
+                                        command, length, values);
+
+        while (suboffset < length) {
+                s32 retval = i2c_smbus_read_i2c_block_data(client,
+                                command + suboffset,
+                                min(I2C_SMBUS_BLOCK_MAX, length - suboffset),
+                                values + suboffset);
+                if (retval < 0)
+                        return retval;
+
+                suboffset += I2C_SMBUS_BLOCK_MAX;
+        }
+        return length;
+}
+
+/*----------------------------------------------------------------------*/
+
 /*
  * The IRQ logic includes a "real" handler running in IRQ context just
  * long enough to schedule this workqueue entry.   We need a task context
@@ -646,8 +698,8 @@ static int ds1307_probe(struct i2c_client *client,
 
         buf = ds1307->regs;
         if (i2c_check_functionality(adapter, I2C_FUNC_SMBUS_I2C_BLOCK)) {
-                ds1307->read_block_data = i2c_smbus_read_i2c_block_data;
-                ds1307->write_block_data = i2c_smbus_write_i2c_block_data;
+                ds1307->read_block_data = ds1307_native_smbus_read_block_data;
+                ds1307->write_block_data = ds1307_native_smbus_write_block_data;
         } else {
                 ds1307->read_block_data = ds1307_read_block_data;
                 ds1307->write_block_data = ds1307_write_block_data;
@@ -661,7 +713,7 @@ static int ds1307_probe(struct i2c_client *client,
                 tmp = ds1307->read_block_data(ds1307->client,
                                 DS1337_REG_CONTROL, 2, buf);
                 if (tmp != 2) {
-                        pr_debug("read error %d\n", tmp);
+                        dev_dbg(&client->dev, "read error %d\n", tmp);
                         err = -EIO;
                         goto exit_free;
                 }
@@ -700,7 +752,7 @@ static int ds1307_probe(struct i2c_client *client,
                 tmp = i2c_smbus_read_i2c_block_data(ds1307->client,
                                 RX8025_REG_CTRL1 << 4 | 0x08, 2, buf);
                 if (tmp != 2) {
-                        pr_debug("read error %d\n", tmp);
+                        dev_dbg(&client->dev, "read error %d\n", tmp);
                         err = -EIO;
                         goto exit_free;
                 }
@@ -744,7 +796,7 @@ static int ds1307_probe(struct i2c_client *client,
                         tmp = i2c_smbus_read_i2c_block_data(ds1307->client,
                                         RX8025_REG_CTRL1 << 4 | 0x08, 2, buf);
                         if (tmp != 2) {
-                                pr_debug("read error %d\n", tmp);
+                                dev_dbg(&client->dev, "read error %d\n", tmp);
                                 err = -EIO;
                                 goto exit_free;
                         }
@@ -772,7 +824,7 @@ read_rtc:
         /* read RTC registers */
         tmp = ds1307->read_block_data(ds1307->client, ds1307->offset, 8, buf);
         if (tmp != 8) {
-                pr_debug("read error %d\n", tmp);
+                dev_dbg(&client->dev, "read error %d\n", tmp);
                 err = -EIO;
                 goto exit_free;
         }
@@ -814,7 +866,7 @@ read_rtc:
 
                 tmp = i2c_smbus_read_byte_data(client, DS1340_REG_FLAG);
                 if (tmp < 0) {
-                        pr_debug("read error %d\n", tmp);
+                        dev_dbg(&client->dev, "read error %d\n", tmp);
                         err = -EIO;
                         goto exit_free;
                 }
@@ -908,8 +960,8 @@ read_rtc:
                 ds1307->nvram->attr.name = "nvram";
                 ds1307->nvram->attr.mode = S_IRUGO | S_IWUSR;
                 sysfs_bin_attr_init(ds1307->nvram);
-                ds1307->nvram->read = ds1307_nvram_read,
-                ds1307->nvram->write = ds1307_nvram_write,
+                ds1307->nvram->read = ds1307_nvram_read;
+                ds1307->nvram->write = ds1307_nvram_write;
                 ds1307->nvram->size = chip->nvram_size;
                 ds1307->nvram_offset = chip->nvram_offset;
                 err = sysfs_create_bin_file(&client->dev.kobj, ds1307->nvram);
diff --git a/drivers/rtc/rtc-ds1374.c b/drivers/rtc/rtc-ds1374.c
index fef76868aae0..94366e12f40f 100644
--- a/drivers/rtc/rtc-ds1374.c
+++ b/drivers/rtc/rtc-ds1374.c
@@ -347,7 +347,7 @@ static int ds1374_probe(struct i2c_client *client,
         struct ds1374 *ds1374;
         int ret;
 
-        ds1374 = kzalloc(sizeof(struct ds1374), GFP_KERNEL);
+        ds1374 = devm_kzalloc(&client->dev, sizeof(struct ds1374), GFP_KERNEL);
         if (!ds1374)
                 return -ENOMEM;
 
@@ -359,36 +359,27 @@ static int ds1374_probe(struct i2c_client *client,
 
         ret = ds1374_check_rtc_status(client);
         if (ret)
-                goto out_free;
+                return ret;
 
         if (client->irq > 0) {
-                ret = request_irq(client->irq, ds1374_irq, 0,
+                ret = devm_request_irq(&client->dev, client->irq, ds1374_irq, 0,
                                   "ds1374", client);
                 if (ret) {
                         dev_err(&client->dev, "unable to request IRQ\n");
-                        goto out_free;
+                        return ret;
                 }
 
                 device_set_wakeup_capable(&client->dev, 1);
         }
 
-        ds1374->rtc = rtc_device_register(client->name, &client->dev,
+        ds1374->rtc = devm_rtc_device_register(&client->dev, client->name,
                                           &ds1374_rtc_ops, THIS_MODULE);
         if (IS_ERR(ds1374->rtc)) {
-                ret = PTR_ERR(ds1374->rtc);
                 dev_err(&client->dev, "unable to register the class device\n");
-                goto out_irq;
+                return PTR_ERR(ds1374->rtc);
         }
 
         return 0;
-
-out_irq:
-        if (client->irq > 0)
-                free_irq(client->irq, client);
-
-out_free:
-        kfree(ds1374);
-        return ret;
 }
 
 static int ds1374_remove(struct i2c_client *client)
@@ -400,16 +391,14 @@ static int ds1374_remove(struct i2c_client *client)
                 ds1374->exiting = 1;
                 mutex_unlock(&ds1374->mutex);
 
-                free_irq(client->irq, client);
+                devm_free_irq(&client->dev, client->irq, client);
                 cancel_work_sync(&ds1374->work);
         }
 
-        rtc_device_unregister(ds1374->rtc);
-        kfree(ds1374);
         return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int ds1374_suspend(struct device *dev)
 {
         struct i2c_client *client = to_i2c_client(dev);
@@ -427,19 +416,15 @@ static int ds1374_resume(struct device *dev)
                 disable_irq_wake(client->irq);
         return 0;
 }
+#endif
 
 static SIMPLE_DEV_PM_OPS(ds1374_pm, ds1374_suspend, ds1374_resume);
 
-#define DS1374_PM (&ds1374_pm)
-#else
-#define DS1374_PM NULL
-#endif
-
 static struct i2c_driver ds1374_driver = {
         .driver = {
                 .name = "rtc-ds1374",
                 .owner = THIS_MODULE,
-                .pm = DS1374_PM,
+                .pm = &ds1374_pm,
         },
         .probe = ds1374_probe,
         .remove = ds1374_remove,
diff --git a/drivers/rtc/rtc-ds1390.c b/drivers/rtc/rtc-ds1390.c
index f994257981a0..289af419dff4 100644
--- a/drivers/rtc/rtc-ds1390.c
+++ b/drivers/rtc/rtc-ds1390.c
@@ -131,26 +131,24 @@ static int ds1390_probe(struct spi_device *spi)
         spi->bits_per_word = 8;
         spi_setup(spi);
 
-        chip = kzalloc(sizeof *chip, GFP_KERNEL);
+        chip = devm_kzalloc(&spi->dev, sizeof(*chip), GFP_KERNEL);
         if (!chip) {
                 dev_err(&spi->dev, "unable to allocate device memory\n");
                 return -ENOMEM;
         }
-        dev_set_drvdata(&spi->dev, chip);
+        spi_set_drvdata(spi, chip);
 
         res = ds1390_get_reg(&spi->dev, DS1390_REG_SECONDS, &tmp);
         if (res != 0) {
                 dev_err(&spi->dev, "unable to read device\n");
-                kfree(chip);
                 return res;
         }
 
-        chip->rtc = rtc_device_register("ds1390",
-                                &spi->dev, &ds1390_rtc_ops, THIS_MODULE);
+        chip->rtc = devm_rtc_device_register(&spi->dev, "ds1390",
+                                        &ds1390_rtc_ops, THIS_MODULE);
         if (IS_ERR(chip->rtc)) {
                 dev_err(&spi->dev, "unable to register device\n");
                 res = PTR_ERR(chip->rtc);
-                kfree(chip);
         }
 
         return res;
@@ -158,11 +156,6 @@ static int ds1390_probe(struct spi_device *spi)
 
 static int ds1390_remove(struct spi_device *spi)
 {
-        struct ds1390 *chip = spi_get_drvdata(spi);
-
-        rtc_device_unregister(chip->rtc);
-        kfree(chip);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c
index 6a3fcfe3b0e7..6ce8a997cf51 100644
--- a/drivers/rtc/rtc-ds1511.c
+++ b/drivers/rtc/rtc-ds1511.c
@@ -538,15 +538,14 @@ static int ds1511_rtc_probe(struct platform_device *pdev)
                 }
         }
 
-        rtc = rtc_device_register(pdev->name, &pdev->dev, &ds1511_rtc_ops,
-                THIS_MODULE);
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &ds1511_rtc_ops,
+                                        THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
         pdata->rtc = rtc;
 
         ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr);
-        if (ret)
-                rtc_device_unregister(pdata->rtc);
+
         return ret;
 }
 
@@ -555,7 +554,6 @@ static int ds1511_rtc_remove(struct platform_device *pdev)
         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
         sysfs_remove_bin_file(&pdev->dev.kobj, &ds1511_nvram_attr);
-        rtc_device_unregister(pdata->rtc);
         if (pdata->irq > 0) {
                 /*
                  * disable the alarm interrupt
diff --git a/drivers/rtc/rtc-ds1553.c b/drivers/rtc/rtc-ds1553.c
index 25ce0621ade9..8c6c952e90b1 100644
--- a/drivers/rtc/rtc-ds1553.c
+++ b/drivers/rtc/rtc-ds1553.c
@@ -326,15 +326,14 @@ static int ds1553_rtc_probe(struct platform_device *pdev)
                 }
         }
 
-        rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                   &ds1553_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
         pdata->rtc = rtc;
 
         ret = sysfs_create_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr);
-        if (ret)
-                rtc_device_unregister(rtc);
+
         return ret;
 }
 
@@ -343,7 +342,6 @@ static int ds1553_rtc_remove(struct platform_device *pdev)
         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
         sysfs_remove_bin_file(&pdev->dev.kobj, &ds1553_nvram_attr);
-        rtc_device_unregister(pdata->rtc);
         if (pdata->irq > 0)
                 writeb(0, pdata->ioaddr + RTC_INTERRUPTS);
         return 0;
diff --git a/drivers/rtc/rtc-ds1672.c b/drivers/rtc/rtc-ds1672.c
index 45d65c0b3a85..3fc2a4738027 100644
--- a/drivers/rtc/rtc-ds1672.c
+++ b/drivers/rtc/rtc-ds1672.c
@@ -155,11 +155,6 @@ static const struct rtc_class_ops ds1672_rtc_ops = {
 
 static int ds1672_remove(struct i2c_client *client)
 {
-        struct rtc_device *rtc = i2c_get_clientdata(client);
-
-        if (rtc)
-                rtc_device_unregister(rtc);
-
         return 0;
 }
 
@@ -177,7 +172,7 @@ static int ds1672_probe(struct i2c_client *client,
 
         dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
-        rtc = rtc_device_register(ds1672_driver.driver.name, &client->dev,
+        rtc = devm_rtc_device_register(&client->dev, ds1672_driver.driver.name,
                                   &ds1672_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc))
@@ -202,7 +197,6 @@ static int ds1672_probe(struct i2c_client *client,
         return 0;
 
  exit_devreg:
-        rtc_device_unregister(rtc);
         return err;
 }
 
diff --git a/drivers/rtc/rtc-ds1742.c b/drivers/rtc/rtc-ds1742.c
index 609c870e2cc5..eccdc62ae1c0 100644
--- a/drivers/rtc/rtc-ds1742.c
+++ b/drivers/rtc/rtc-ds1742.c
@@ -208,17 +208,14 @@ static int ds1742_rtc_probe(struct platform_device *pdev)
 
         pdata->last_jiffies = jiffies;
         platform_set_drvdata(pdev, pdata);
-        rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                   &ds1742_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
         pdata->rtc = rtc;
 
         ret = sysfs_create_bin_file(&pdev->dev.kobj, &pdata->nvram_attr);
-        if (ret) {
-                dev_err(&pdev->dev, "creating nvram file in sysfs failed\n");
-                rtc_device_unregister(rtc);
-        }
+
         return ret;
 }
 
@@ -227,7 +224,6 @@ static int ds1742_rtc_remove(struct platform_device *pdev)
         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
         sysfs_remove_bin_file(&pdev->dev.kobj, &pdata->nvram_attr);
-        rtc_device_unregister(pdata->rtc);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ds2404.c b/drivers/rtc/rtc-ds2404.c
index b04fc4272fb3..2ca5a23aba8a 100644
--- a/drivers/rtc/rtc-ds2404.c
+++ b/drivers/rtc/rtc-ds2404.c
@@ -228,7 +228,7 @@ static int rtc_probe(struct platform_device *pdev)
         struct ds2404 *chip;
         int retval = -EBUSY;
 
-        chip = kzalloc(sizeof(struct ds2404), GFP_KERNEL);
+        chip = devm_kzalloc(&pdev->dev, sizeof(struct ds2404), GFP_KERNEL);
         if (!chip)
                 return -ENOMEM;
 
@@ -244,8 +244,8 @@ static int rtc_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, chip);
 
-        chip->rtc = rtc_device_register("ds2404",
-                                &pdev->dev, &ds2404_rtc_ops, THIS_MODULE);
+        chip->rtc = devm_rtc_device_register(&pdev->dev, "ds2404",
+                                        &ds2404_rtc_ops, THIS_MODULE);
         if (IS_ERR(chip->rtc)) {
                 retval = PTR_ERR(chip->rtc);
                 goto err_io;
@@ -257,20 +257,14 @@ static int rtc_probe(struct platform_device *pdev)
 err_io:
         chip->ops->unmap_io(chip);
 err_chip:
-        kfree(chip);
         return retval;
 }
 
 static int rtc_remove(struct platform_device *dev)
 {
         struct ds2404 *chip = platform_get_drvdata(dev);
-        struct rtc_device *rtc = chip->rtc;
-
-        if (rtc)
-                rtc_device_unregister(rtc);
 
         chip->ops->unmap_io(chip);
-        kfree(chip);
 
         return 0;
 }
diff --git a/drivers/rtc/rtc-ds3232.c b/drivers/rtc/rtc-ds3232.c
index db0ca08db315..b83bb5a527f8 100644
--- a/drivers/rtc/rtc-ds3232.c
+++ b/drivers/rtc/rtc-ds3232.c
@@ -397,7 +397,7 @@ static int ds3232_probe(struct i2c_client *client,
         struct ds3232 *ds3232;
         int ret;
 
-        ds3232 = kzalloc(sizeof(struct ds3232), GFP_KERNEL);
+        ds3232 = devm_kzalloc(&client->dev, sizeof(struct ds3232), GFP_KERNEL);
         if (!ds3232)
                 return -ENOMEM;
 
@@ -409,34 +409,25 @@ static int ds3232_probe(struct i2c_client *client,
 
         ret = ds3232_check_rtc_status(client);
         if (ret)
-                goto out_free;
+                return ret;
 
-        ds3232->rtc = rtc_device_register(client->name, &client->dev,
+        ds3232->rtc = devm_rtc_device_register(&client->dev, client->name,
                                           &ds3232_rtc_ops, THIS_MODULE);
         if (IS_ERR(ds3232->rtc)) {
-                ret = PTR_ERR(ds3232->rtc);
                 dev_err(&client->dev, "unable to register the class device\n");
-                goto out_irq;
+                return PTR_ERR(ds3232->rtc);
         }
 
         if (client->irq >= 0) {
-                ret = request_irq(client->irq, ds3232_irq, 0,
+                ret = devm_request_irq(&client->dev, client->irq, ds3232_irq, 0,
                                  "ds3232", client);
                 if (ret) {
                         dev_err(&client->dev, "unable to request IRQ\n");
-                        goto out_free;
+                        return ret;
                 }
         }
 
         return 0;
-
-out_irq:
-        if (client->irq >= 0)
-                free_irq(client->irq, client);
-
-out_free:
-        kfree(ds3232);
-        return ret;
 }
 
 static int ds3232_remove(struct i2c_client *client)
@@ -448,12 +439,10 @@ static int ds3232_remove(struct i2c_client *client)
                 ds3232->exiting = 1;
                 mutex_unlock(&ds3232->mutex);
 
-                free_irq(client->irq, client);
+                devm_free_irq(&client->dev, client->irq, client);
                 cancel_work_sync(&ds3232->work);
         }
 
-        rtc_device_unregister(ds3232->rtc);
-        kfree(ds3232);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ds3234.c b/drivers/rtc/rtc-ds3234.c
index 7a4495ef1c39..ba98c0e9580d 100644
--- a/drivers/rtc/rtc-ds3234.c
+++ b/drivers/rtc/rtc-ds3234.c
@@ -146,21 +146,18 @@ static int ds3234_probe(struct spi_device *spi)
         ds3234_get_reg(&spi->dev, DS3234_REG_CONT_STAT, &tmp);
         dev_info(&spi->dev, "Ctrl/Stat Reg: 0x%02x\n", tmp);
 
-        rtc = rtc_device_register("ds3234",
-                                &spi->dev, &ds3234_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&spi->dev, "ds3234",
+                                &ds3234_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
-        dev_set_drvdata(&spi->dev, rtc);
+        spi_set_drvdata(spi, rtc);
 
         return 0;
 }
 
 static int ds3234_remove(struct spi_device *spi)
 {
-        struct rtc_device *rtc = spi_get_drvdata(spi);
-
-        rtc_device_unregister(rtc);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-efi.c b/drivers/rtc/rtc-efi.c
index 1a0c37c9152b..b3c8c0b1709d 100644
--- a/drivers/rtc/rtc-efi.c
+++ b/drivers/rtc/rtc-efi.c
@@ -191,7 +191,7 @@ static int __init efi_rtc_probe(struct platform_device *dev)
 {
         struct rtc_device *rtc;
 
-        rtc = rtc_device_register("rtc-efi", &dev->dev, &efi_rtc_ops,
+        rtc = devm_rtc_device_register(&dev->dev, "rtc-efi", &efi_rtc_ops,
                                         THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -203,10 +203,6 @@ static int __init efi_rtc_probe(struct platform_device *dev)
 
 static int __exit efi_rtc_remove(struct platform_device *dev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(dev);
-
-        rtc_device_unregister(rtc);
-
         return 0;
 }
 
@@ -218,18 +214,7 @@ static struct platform_driver efi_rtc_driver = {
         .remove = __exit_p(efi_rtc_remove),
 };
 
-static int __init efi_rtc_init(void)
-{
-        return platform_driver_probe(&efi_rtc_driver, efi_rtc_probe);
-}
-
-static void __exit efi_rtc_exit(void)
-{
-        platform_driver_unregister(&efi_rtc_driver);
-}
-
-module_init(efi_rtc_init);
-module_exit(efi_rtc_exit);
+module_platform_driver_probe(efi_rtc_driver, efi_rtc_probe);
 
 MODULE_AUTHOR("dann frazier <dannf@hp.com>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-em3027.c b/drivers/rtc/rtc-em3027.c
index f6c24ce35d36..3f9eb57d0486 100644
--- a/drivers/rtc/rtc-em3027.c
+++ b/drivers/rtc/rtc-em3027.c
@@ -121,7 +121,7 @@ static int em3027_probe(struct i2c_client *client,
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
                 return -ENODEV;
 
-        rtc = rtc_device_register(em3027_driver.driver.name, &client->dev,
+        rtc = devm_rtc_device_register(&client->dev, em3027_driver.driver.name,
                                   &em3027_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -133,11 +133,6 @@ static int em3027_probe(struct i2c_client *client,
 
 static int em3027_remove(struct i2c_client *client)
 {
-        struct rtc_device *rtc = i2c_get_clientdata(client);
-
-        if (rtc)
-                rtc_device_unregister(rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ep93xx.c b/drivers/rtc/rtc-ep93xx.c
index 1a4e5e4a70cd..5807b77c444a 100644
--- a/drivers/rtc/rtc-ep93xx.c
+++ b/drivers/rtc/rtc-ep93xx.c
@@ -153,8 +153,8 @@ static int ep93xx_rtc_probe(struct platform_device *pdev)
         pdev->dev.platform_data = ep93xx_rtc;
         platform_set_drvdata(pdev, ep93xx_rtc);
 
-        ep93xx_rtc->rtc = rtc_device_register(pdev->name,
-                                &pdev->dev, &ep93xx_rtc_ops, THIS_MODULE);
+        ep93xx_rtc->rtc = devm_rtc_device_register(&pdev->dev,
+                                pdev->name, &ep93xx_rtc_ops, THIS_MODULE);
         if (IS_ERR(ep93xx_rtc->rtc)) {
                 err = PTR_ERR(ep93xx_rtc->rtc);
                 goto exit;
@@ -162,12 +162,10 @@ static int ep93xx_rtc_probe(struct platform_device *pdev)
 
         err = sysfs_create_group(&pdev->dev.kobj, &ep93xx_rtc_sysfs_files);
         if (err)
-                goto fail;
+                goto exit;
 
         return 0;
 
-fail:
-        rtc_device_unregister(ep93xx_rtc->rtc);
 exit:
         platform_set_drvdata(pdev, NULL);
         pdev->dev.platform_data = NULL;
@@ -176,11 +174,8 @@ exit:
 
 static int ep93xx_rtc_remove(struct platform_device *pdev)
 {
-        struct ep93xx_rtc *ep93xx_rtc = platform_get_drvdata(pdev);
-
         sysfs_remove_group(&pdev->dev.kobj, &ep93xx_rtc_sysfs_files);
         platform_set_drvdata(pdev, NULL);
-        rtc_device_unregister(ep93xx_rtc->rtc);
         pdev->dev.platform_data = NULL;
 
         return 0;
diff --git a/drivers/rtc/rtc-fm3130.c b/drivers/rtc/rtc-fm3130.c
index bff3cdc5140e..2835fb6c1965 100644
--- a/drivers/rtc/rtc-fm3130.c
+++ b/drivers/rtc/rtc-fm3130.c
@@ -358,7 +358,7 @@ static int fm3130_probe(struct i2c_client *client,
                         I2C_FUNC_I2C | I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
                 return -EIO;
 
-        fm3130 = kzalloc(sizeof(struct fm3130), GFP_KERNEL);
+        fm3130 = devm_kzalloc(&client->dev, sizeof(struct fm3130), GFP_KERNEL);
 
         if (!fm3130)
                 return -ENOMEM;
@@ -395,7 +395,7 @@ static int fm3130_probe(struct i2c_client *client,
 
         tmp = i2c_transfer(adapter, fm3130->msg, 4);
         if (tmp != 4) {
-                pr_debug("read error %d\n", tmp);
+                dev_dbg(&client->dev, "read error %d\n", tmp);
                 err = -EIO;
                 goto exit_free;
         }
@@ -507,7 +507,7 @@ bad_clock:
 
         /* We won't bail out here because we just got invalid data.
            Time setting from u-boot doesn't work anyway */
-        fm3130->rtc = rtc_device_register(client->name, &client->dev,
+        fm3130->rtc = devm_rtc_device_register(&client->dev, client->name,
                                 &fm3130_rtc_ops, THIS_MODULE);
         if (IS_ERR(fm3130->rtc)) {
                 err = PTR_ERR(fm3130->rtc);
@@ -517,16 +517,11 @@ bad_clock:
         }
         return 0;
 exit_free:
-        kfree(fm3130);
         return err;
 }
 
 static int fm3130_remove(struct i2c_client *client)
 {
-        struct fm3130 *fm3130 = i2c_get_clientdata(client);
-
-        rtc_device_unregister(fm3130->rtc);
-        kfree(fm3130);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-generic.c b/drivers/rtc/rtc-generic.c
index 98322004ad2e..06279ce6bff2 100644
--- a/drivers/rtc/rtc-generic.c
+++ b/drivers/rtc/rtc-generic.c
@@ -38,8 +38,8 @@ static int __init generic_rtc_probe(struct platform_device *dev)
 {
         struct rtc_device *rtc;
 
-        rtc = rtc_device_register("rtc-generic", &dev->dev, &generic_rtc_ops,
-                                  THIS_MODULE);
+        rtc = devm_rtc_device_register(&dev->dev, "rtc-generic",
+                                        &generic_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
@@ -50,10 +50,6 @@ static int __init generic_rtc_probe(struct platform_device *dev)
 
 static int __exit generic_rtc_remove(struct platform_device *dev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(dev);
-
-        rtc_device_unregister(rtc);
-
         return 0;
 }
 
@@ -65,18 +61,7 @@ static struct platform_driver generic_rtc_driver = {
         .remove = __exit_p(generic_rtc_remove),
 };
 
-static int __init generic_rtc_init(void)
-{
-        return platform_driver_probe(&generic_rtc_driver, generic_rtc_probe);
-}
-
-static void __exit generic_rtc_fini(void)
-{
-        platform_driver_unregister(&generic_rtc_driver);
-}
-
-module_init(generic_rtc_init);
-module_exit(generic_rtc_fini);
+module_platform_driver_probe(generic_rtc_driver, generic_rtc_probe);
 
 MODULE_AUTHOR("Kyle McMartin <kyle@mcmartin.ca>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-hid-sensor-time.c b/drivers/rtc/rtc-hid-sensor-time.c
index 31c5728ef629..63024505dddc 100644
--- a/drivers/rtc/rtc-hid-sensor-time.c
+++ b/drivers/rtc/rtc-hid-sensor-time.c
@@ -255,8 +255,9 @@ static int hid_time_probe(struct platform_device *pdev)
                 return ret;
         }
 
-        time_state->rtc = rtc_device_register("hid-sensor-time",
-                                &pdev->dev, &hid_time_rtc_ops, THIS_MODULE);
+        time_state->rtc = devm_rtc_device_register(&pdev->dev,
+                                        "hid-sensor-time", &hid_time_rtc_ops,
+                                        THIS_MODULE);
 
         if (IS_ERR(time_state->rtc)) {
                 dev_err(&pdev->dev, "rtc device register failed!\n");
@@ -269,9 +270,7 @@ static int hid_time_probe(struct platform_device *pdev)
 static int hid_time_remove(struct platform_device *pdev)
 {
         struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
-        struct hid_time_state *time_state = platform_get_drvdata(pdev);
 
-        rtc_device_unregister(time_state->rtc);
         sensor_hub_remove_callback(hsdev, HID_USAGE_SENSOR_TIME);
 
         return 0;
diff --git a/drivers/rtc/rtc-imxdi.c b/drivers/rtc/rtc-imxdi.c
index 82aad695979e..d3a8c8e255de 100644
--- a/drivers/rtc/rtc-imxdi.c
+++ b/drivers/rtc/rtc-imxdi.c
@@ -369,7 +369,7 @@ static void dryice_work(struct work_struct *work)
 /*
  * probe for dryice rtc device
  */
-static int dryice_rtc_probe(struct platform_device *pdev)
+static int __init dryice_rtc_probe(struct platform_device *pdev)
 {
         struct resource *res;
         struct imxdi_dev *imxdi;
@@ -464,7 +464,7 @@ static int dryice_rtc_probe(struct platform_device *pdev)
         }
 
         platform_set_drvdata(pdev, imxdi);
-        imxdi->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        imxdi->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                   &dryice_rtc_ops, THIS_MODULE);
         if (IS_ERR(imxdi->rtc)) {
                 rc = PTR_ERR(imxdi->rtc);
@@ -479,7 +479,7 @@ err:
         return rc;
 }
 
-static int dryice_rtc_remove(struct platform_device *pdev)
+static int __exit dryice_rtc_remove(struct platform_device *pdev)
 {
         struct imxdi_dev *imxdi = platform_get_drvdata(pdev);
 
@@ -488,8 +488,6 @@ static int dryice_rtc_remove(struct platform_device *pdev)
         /* mask all interrupts */
         __raw_writel(0, imxdi->ioaddr + DIER);
 
-        rtc_device_unregister(imxdi->rtc);
-
         clk_disable_unprepare(imxdi->clk);
 
         return 0;
@@ -510,21 +508,10 @@ static struct platform_driver dryice_rtc_driver = {
                    .owner = THIS_MODULE,
                    .of_match_table = of_match_ptr(dryice_dt_ids),
                    },
-        .remove = dryice_rtc_remove,
+        .remove = __exit_p(dryice_rtc_remove),
 };
 
-static int __init dryice_rtc_init(void)
-{
-        return platform_driver_probe(&dryice_rtc_driver, dryice_rtc_probe);
-}
-
-static void __exit dryice_rtc_exit(void)
-{
-        platform_driver_unregister(&dryice_rtc_driver);
-}
-
-module_init(dryice_rtc_init);
-module_exit(dryice_rtc_exit);
+module_platform_driver_probe(dryice_rtc_driver, dryice_rtc_probe);
 
 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
 MODULE_AUTHOR("Baruch Siach <baruch@tkos.co.il>");
diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c
index 6b4298ea683d..a1bbbb8de029 100644
--- a/drivers/rtc/rtc-isl12022.c
+++ b/drivers/rtc/rtc-isl12022.c
@@ -252,12 +252,11 @@ static int isl12022_probe(struct i2c_client *client,
 {
         struct isl12022 *isl12022;
 
-        int ret = 0;
-
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
                 return -ENODEV;
 
-        isl12022 = kzalloc(sizeof(struct isl12022), GFP_KERNEL);
+        isl12022 = devm_kzalloc(&client->dev, sizeof(struct isl12022),
+                                GFP_KERNEL);
         if (!isl12022)
                 return -ENOMEM;
 
@@ -265,37 +264,22 @@ static int isl12022_probe(struct i2c_client *client,
 
         i2c_set_clientdata(client, isl12022);
 
-        isl12022->rtc = rtc_device_register(isl12022_driver.driver.name,
-                                            &client->dev,
-                                            &isl12022_rtc_ops,
-                                            THIS_MODULE);
-
-        if (IS_ERR(isl12022->rtc)) {
-                ret = PTR_ERR(isl12022->rtc);
-                goto exit_kfree;
-        }
+        isl12022->rtc = devm_rtc_device_register(&client->dev,
+                                        isl12022_driver.driver.name,
+                                        &isl12022_rtc_ops, THIS_MODULE);
+        if (IS_ERR(isl12022->rtc))
+                return PTR_ERR(isl12022->rtc);
 
         return 0;
-
-exit_kfree:
-        kfree(isl12022);
-
-        return ret;
 }
 
 static int isl12022_remove(struct i2c_client *client)
 {
-        struct isl12022 *isl12022 = i2c_get_clientdata(client);
-
-        rtc_device_unregister(isl12022->rtc);
-        kfree(isl12022);
-
         return 0;
 }
 
 static const struct i2c_device_id isl12022_id[] = {
         { "isl12022", 0 },
-        { "rtc8564", 0 },
         { }
 };
 MODULE_DEVICE_TABLE(i2c, isl12022_id);
diff --git a/drivers/rtc/rtc-lp8788.c b/drivers/rtc/rtc-lp8788.c
index 9a4631218f41..9853ac15b296 100644
--- a/drivers/rtc/rtc-lp8788.c
+++ b/drivers/rtc/rtc-lp8788.c
@@ -299,7 +299,7 @@ static int lp8788_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(dev, 1);
 
-        rtc->rdev = rtc_device_register("lp8788_rtc", dev,
+        rtc->rdev = devm_rtc_device_register(dev, "lp8788_rtc",
                                         &lp8788_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rdev)) {
                 dev_err(dev, "can not register rtc device\n");
@@ -314,9 +314,6 @@ static int lp8788_rtc_probe(struct platform_device *pdev)
 
 static int lp8788_rtc_remove(struct platform_device *pdev)
 {
-        struct lp8788_rtc *rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtc->rdev);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
diff --git a/drivers/rtc/rtc-lpc32xx.c b/drivers/rtc/rtc-lpc32xx.c
index 40a598332bac..787550d756e9 100644
--- a/drivers/rtc/rtc-lpc32xx.c
+++ b/drivers/rtc/rtc-lpc32xx.c
@@ -273,8 +273,8 @@ static int lpc32xx_rtc_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, rtc);
 
-        rtc->rtc = rtc_device_register(RTC_NAME, &pdev->dev, &lpc32xx_rtc_ops,
-                THIS_MODULE);
+        rtc->rtc = devm_rtc_device_register(&pdev->dev, RTC_NAME,
+                                        &lpc32xx_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtc)) {
                 dev_err(&pdev->dev, "Can't get RTC\n");
                 platform_set_drvdata(pdev, NULL);
@@ -307,7 +307,6 @@ static int lpc32xx_rtc_remove(struct platform_device *pdev)
                 device_init_wakeup(&pdev->dev, 0);
 
         platform_set_drvdata(pdev, NULL);
-        rtc_device_unregister(rtc->rtc);
 
         return 0;
 }
diff --git a/drivers/rtc/rtc-ls1x.c b/drivers/rtc/rtc-ls1x.c
index f59b6349551a..db82f91f4562 100644
--- a/drivers/rtc/rtc-ls1x.c
+++ b/drivers/rtc/rtc-ls1x.c
@@ -172,7 +172,7 @@ static int ls1x_rtc_probe(struct platform_device *pdev)
         while (readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_TTS)
                 usleep_range(1000, 3000);
 
-        rtcdev = rtc_device_register("ls1x-rtc", &pdev->dev,
+        rtcdev = devm_rtc_device_register(&pdev->dev, "ls1x-rtc",
                                         &ls1x_rtc_ops , THIS_MODULE);
         if (IS_ERR(rtcdev)) {
                 ret = PTR_ERR(rtcdev);
@@ -187,9 +187,6 @@ err:
 
 static int ls1x_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtcdev = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtcdev);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index b885bcd08908..89674b5e6efd 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -637,7 +637,8 @@ static int m41t80_probe(struct i2c_client *client,
         dev_info(&client->dev,
                  "chip found, driver version " DRV_VERSION "\n");
 
-        clientdata = kzalloc(sizeof(*clientdata), GFP_KERNEL);
+        clientdata = devm_kzalloc(&client->dev, sizeof(*clientdata),
+                                GFP_KERNEL);
         if (!clientdata) {
                 rc = -ENOMEM;
                 goto exit;
@@ -646,8 +647,8 @@ static int m41t80_probe(struct i2c_client *client,
         clientdata->features = id->driver_data;
         i2c_set_clientdata(client, clientdata);
 
-        rtc = rtc_device_register(client->name, &client->dev,
-                                  &m41t80_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&client->dev, client->name,
+                                        &m41t80_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
                 rc = PTR_ERR(rtc);
                 rtc = NULL;
@@ -718,26 +719,19 @@ ht_err:
         goto exit;
 
 exit:
-        if (rtc)
-                rtc_device_unregister(rtc);
-        kfree(clientdata);
         return rc;
 }
 
 static int m41t80_remove(struct i2c_client *client)
 {
+#ifdef CONFIG_RTC_DRV_M41T80_WDT
         struct m41t80_data *clientdata = i2c_get_clientdata(client);
-        struct rtc_device *rtc = clientdata->rtc;
 
-#ifdef CONFIG_RTC_DRV_M41T80_WDT
         if (clientdata->features & M41T80_FEATURE_HT) {
                 misc_deregister(&wdt_dev);
                 unregister_reboot_notifier(&wdt_notifier);
         }
 #endif
-        if (rtc)
-                rtc_device_unregister(rtc);
-        kfree(clientdata);
 
         return 0;
 }
diff --git a/drivers/rtc/rtc-m41t93.c b/drivers/rtc/rtc-m41t93.c
index 49169680786e..9707d36e8b15 100644
--- a/drivers/rtc/rtc-m41t93.c
+++ b/drivers/rtc/rtc-m41t93.c
@@ -184,12 +184,12 @@ static int m41t93_probe(struct spi_device *spi)
                 return -ENODEV;
         }
 
-        rtc = rtc_device_register(m41t93_driver.driver.name,
-                &spi->dev, &m41t93_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&spi->dev, m41t93_driver.driver.name,
+                                        &m41t93_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
-        dev_set_drvdata(&spi->dev, rtc);
+        spi_set_drvdata(spi, rtc);
 
         return 0;
 }
@@ -197,11 +197,6 @@ static int m41t93_probe(struct spi_device *spi)
 
 static int m41t93_remove(struct spi_device *spi)
 {
-        struct rtc_device *rtc = spi_get_drvdata(spi);
-
-        if (rtc)
-                rtc_device_unregister(rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-m41t94.c b/drivers/rtc/rtc-m41t94.c
index 89266c6764bc..7454ef0a4cfa 100644
--- a/drivers/rtc/rtc-m41t94.c
+++ b/drivers/rtc/rtc-m41t94.c
@@ -124,23 +124,18 @@ static int m41t94_probe(struct spi_device *spi)
                 return res;
         }
 
-        rtc = rtc_device_register(m41t94_driver.driver.name,
-                &spi->dev, &m41t94_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&spi->dev, m41t94_driver.driver.name,
+                                        &m41t94_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
-        dev_set_drvdata(&spi->dev, rtc);
+        spi_set_drvdata(spi, rtc);
 
         return 0;
 }
 
 static int m41t94_remove(struct spi_device *spi)
 {
-        struct rtc_device *rtc = spi_get_drvdata(spi);
-
-        if (rtc)
-                rtc_device_unregister(rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-m48t35.c b/drivers/rtc/rtc-m48t35.c
index 31c9190a1fcb..37444246e5e4 100644
--- a/drivers/rtc/rtc-m48t35.c
+++ b/drivers/rtc/rtc-m48t35.c
@@ -145,12 +145,11 @@ static int m48t35_probe(struct platform_device *pdev)
 {
         struct resource *res;
         struct m48t35_priv *priv;
-        int ret = 0;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res)
                 return -ENODEV;
-        priv = kzalloc(sizeof(struct m48t35_priv), GFP_KERNEL);
+        priv = devm_kzalloc(&pdev->dev, sizeof(struct m48t35_priv), GFP_KERNEL);
         if (!priv)
                 return -ENOMEM;
 
@@ -160,50 +159,29 @@ static int m48t35_probe(struct platform_device *pdev)
          * conflicts are resolved
          */
 #ifndef CONFIG_SGI_IP27
-        if (!request_mem_region(res->start, priv->size, pdev->name)) {
-                ret = -EBUSY;
-                goto out;
-        }
+        if (!devm_request_mem_region(&pdev->dev, res->start, priv->size,
+                                     pdev->name))
+                return -EBUSY;
 #endif
         priv->baseaddr = res->start;
-        priv->reg = ioremap(priv->baseaddr, priv->size);
-        if (!priv->reg) {
-                ret = -ENOMEM;
-                goto out;
-        }
+        priv->reg = devm_ioremap(&pdev->dev, priv->baseaddr, priv->size);
+        if (!priv->reg)
+                return -ENOMEM;
 
         spin_lock_init(&priv->lock);
 
         platform_set_drvdata(pdev, priv);
 
-        priv->rtc = rtc_device_register("m48t35", &pdev->dev,
+        priv->rtc = devm_rtc_device_register(&pdev->dev, "m48t35",
                                   &m48t35_ops, THIS_MODULE);
-        if (IS_ERR(priv->rtc)) {
-                ret = PTR_ERR(priv->rtc);
-                goto out;
-        }
+        if (IS_ERR(priv->rtc))
+                return PTR_ERR(priv->rtc);
 
         return 0;
-
-out:
-        if (priv->reg)
-                iounmap(priv->reg);
-        if (priv->baseaddr)
-                release_mem_region(priv->baseaddr, priv->size);
-        kfree(priv);
-        return ret;
 }
 
 static int m48t35_remove(struct platform_device *pdev)
 {
-        struct m48t35_priv *priv = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(priv->rtc);
-        iounmap(priv->reg);
-#ifndef CONFIG_SGI_IP27
-        release_mem_region(priv->baseaddr, priv->size);
-#endif
-        kfree(priv);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-m48t86.c b/drivers/rtc/rtc-m48t86.c
index 2ffbcacd2439..33a91c484533 100644
--- a/drivers/rtc/rtc-m48t86.c
+++ b/drivers/rtc/rtc-m48t86.c
@@ -148,8 +148,10 @@ static int m48t86_rtc_probe(struct platform_device *dev)
 {
         unsigned char reg;
         struct m48t86_ops *ops = dev->dev.platform_data;
-        struct rtc_device *rtc = rtc_device_register("m48t86",
-                                &dev->dev, &m48t86_rtc_ops, THIS_MODULE);
+        struct rtc_device *rtc;
+
+        rtc = devm_rtc_device_register(&dev->dev, "m48t86",
+                                &m48t86_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -166,11 +168,6 @@ static int m48t86_rtc_probe(struct platform_device *dev)
 
 static int m48t86_rtc_remove(struct platform_device *dev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(dev);
-
-        if (rtc)
-                rtc_device_unregister(rtc);
-
         platform_set_drvdata(dev, NULL);
 
         return 0;
diff --git a/drivers/rtc/rtc-max6900.c b/drivers/rtc/rtc-max6900.c
index a00e33204b91..8669d6d09a00 100644
--- a/drivers/rtc/rtc-max6900.c
+++ b/drivers/rtc/rtc-max6900.c
@@ -214,11 +214,6 @@ static int max6900_rtc_set_time(struct device *dev, struct rtc_time *tm)
 
 static int max6900_remove(struct i2c_client *client)
 {
-        struct rtc_device *rtc = i2c_get_clientdata(client);
-
-        if (rtc)
-                rtc_device_unregister(rtc);
-
         return 0;
 }
 
@@ -237,8 +232,8 @@ max6900_probe(struct i2c_client *client, const struct i2c_device_id *id)
 
         dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
-        rtc = rtc_device_register(max6900_driver.driver.name,
-                                  &client->dev, &max6900_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&client->dev, max6900_driver.driver.name,
+                                        &max6900_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
diff --git a/drivers/rtc/rtc-max6902.c b/drivers/rtc/rtc-max6902.c
index 7d0bf698b79e..e3aea00c3145 100644
--- a/drivers/rtc/rtc-max6902.c
+++ b/drivers/rtc/rtc-max6902.c
@@ -93,24 +93,24 @@ static int max6902_set_time(struct device *dev, struct rtc_time *dt)
         dt->tm_year = dt->tm_year + 1900;
 
         /* Remove write protection */
-        max6902_set_reg(dev, 0xF, 0);
+        max6902_set_reg(dev, MAX6902_REG_CONTROL, 0);
 
-        max6902_set_reg(dev, 0x01, bin2bcd(dt->tm_sec));
-        max6902_set_reg(dev, 0x03, bin2bcd(dt->tm_min));
-        max6902_set_reg(dev, 0x05, bin2bcd(dt->tm_hour));
+        max6902_set_reg(dev, MAX6902_REG_SECONDS, bin2bcd(dt->tm_sec));
+        max6902_set_reg(dev, MAX6902_REG_MINUTES, bin2bcd(dt->tm_min));
+        max6902_set_reg(dev, MAX6902_REG_HOURS, bin2bcd(dt->tm_hour));
 
-        max6902_set_reg(dev, 0x07, bin2bcd(dt->tm_mday));
-        max6902_set_reg(dev, 0x09, bin2bcd(dt->tm_mon + 1));
-        max6902_set_reg(dev, 0x0B, bin2bcd(dt->tm_wday));
-        max6902_set_reg(dev, 0x0D, bin2bcd(dt->tm_year % 100));
-        max6902_set_reg(dev, 0x13, bin2bcd(dt->tm_year / 100));
+        max6902_set_reg(dev, MAX6902_REG_DATE, bin2bcd(dt->tm_mday));
+        max6902_set_reg(dev, MAX6902_REG_MONTH, bin2bcd(dt->tm_mon + 1));
+        max6902_set_reg(dev, MAX6902_REG_DAY, bin2bcd(dt->tm_wday));
+        max6902_set_reg(dev, MAX6902_REG_YEAR, bin2bcd(dt->tm_year % 100));
+        max6902_set_reg(dev, MAX6902_REG_CENTURY, bin2bcd(dt->tm_year / 100));
 
         /* Compulab used a delay here. However, the datasheet
          * does not mention a delay being required anywhere... */
         /* delay(2000); */
 
         /* Write protect */
-        max6902_set_reg(dev, 0xF, 0x80);
+        max6902_set_reg(dev, MAX6902_REG_CONTROL, 0x80);
 
         return 0;
 }
@@ -134,20 +134,17 @@ static int max6902_probe(struct spi_device *spi)
         if (res != 0)
                 return res;
 
-        rtc = rtc_device_register("max6902",
-                                &spi->dev, &max6902_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&spi->dev, "max6902",
+                                &max6902_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
-        dev_set_drvdata(&spi->dev, rtc);
+        spi_set_drvdata(spi, rtc);
         return 0;
 }
 
 static int max6902_remove(struct spi_device *spi)
 {
-        struct rtc_device *rtc = dev_get_drvdata(&spi->dev);
-
-        rtc_device_unregister(rtc);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-max77686.c b/drivers/rtc/rtc-max77686.c
index 6b1337f9baf4..771812d62e6b 100644
--- a/drivers/rtc/rtc-max77686.c
+++ b/drivers/rtc/rtc-max77686.c
@@ -24,7 +24,7 @@
 
 /* RTC Control Register */
 #define BCD_EN_SHIFT                    0
-#define BCD_EN_MASK                             (1 << BCD_EN_SHIFT)
+#define BCD_EN_MASK                     (1 << BCD_EN_SHIFT)
 #define MODEL24_SHIFT                   1
 #define MODEL24_MASK                    (1 << MODEL24_SHIFT)
 /* RTC Update Register1 */
@@ -33,12 +33,12 @@
 #define RTC_RBUDR_SHIFT                 4
 #define RTC_RBUDR_MASK                  (1 << RTC_RBUDR_SHIFT)
 /* WTSR and SMPL Register */
-#define WTSRT_SHIFT                             0
-#define SMPLT_SHIFT                             2
+#define WTSRT_SHIFT                     0
+#define SMPLT_SHIFT                     2
 #define WTSR_EN_SHIFT                   6
 #define SMPL_EN_SHIFT                   7
-#define WTSRT_MASK                              (3 << WTSRT_SHIFT)
-#define SMPLT_MASK                              (3 << SMPLT_SHIFT)
+#define WTSRT_MASK                      (3 << WTSRT_SHIFT)
+#define SMPLT_MASK                      (3 << SMPLT_SHIFT)
 #define WTSR_EN_MASK                    (1 << WTSR_EN_SHIFT)
 #define SMPL_EN_MASK                    (1 << SMPL_EN_SHIFT)
 /* RTC Hour register */
@@ -466,7 +466,7 @@ static void max77686_rtc_enable_smpl(struct max77686_rtc_info *info, bool enable
 
         val = 0;
         regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val);
-        pr_info("%s: WTSR_SMPL(0x%02x)\n", __func__, val);
+        dev_info(info->dev, "%s: WTSR_SMPL(0x%02x)\n", __func__, val);
 }
 #endif /* MAX77686_RTC_WTSR_SMPL */
 
@@ -505,7 +505,8 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 
         dev_info(&pdev->dev, "%s\n", __func__);
 
-        info = kzalloc(sizeof(struct max77686_rtc_info), GFP_KERNEL);
+        info = devm_kzalloc(&pdev->dev, sizeof(struct max77686_rtc_info),
+                                GFP_KERNEL);
         if (!info)
                 return -ENOMEM;
 
@@ -513,13 +514,12 @@ static int max77686_rtc_probe(struct platform_device *pdev)
         info->dev = &pdev->dev;
         info->max77686 = max77686;
         info->rtc = max77686->rtc;
-        info->max77686->rtc_regmap = regmap_init_i2c(info->max77686->rtc,
+        info->max77686->rtc_regmap = devm_regmap_init_i2c(info->max77686->rtc,
                                          &max77686_rtc_regmap_config);
         if (IS_ERR(info->max77686->rtc_regmap)) {
                 ret = PTR_ERR(info->max77686->rtc_regmap);
                 dev_err(info->max77686->dev, "Failed to allocate register map: %d\n",
                                 ret);
-                kfree(info);
                 return ret;
         }
         platform_set_drvdata(pdev, info);
@@ -538,8 +538,8 @@ static int max77686_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 1);
 
-        info->rtc_dev = rtc_device_register("max77686-rtc", &pdev->dev,
-                        &max77686_rtc_ops, THIS_MODULE);
+        info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max77686-rtc",
+                                        &max77686_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(info->rtc_dev)) {
                 dev_info(&pdev->dev, "%s: fail\n", __func__);
@@ -551,36 +551,24 @@ static int max77686_rtc_probe(struct platform_device *pdev)
                 goto err_rtc;
         }
         virq = irq_create_mapping(max77686->irq_domain, MAX77686_RTCIRQ_RTCA1);
-        if (!virq)
+        if (!virq) {
+                ret = -ENXIO;
                 goto err_rtc;
+        }
         info->virq = virq;
 
-        ret = request_threaded_irq(virq, NULL, max77686_rtc_alarm_irq, 0,
-                        "rtc-alarm0", info);
-        if (ret < 0) {
+        ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
+                                max77686_rtc_alarm_irq, 0, "rtc-alarm0", info);
+        if (ret < 0)
                 dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
                         info->virq, ret);
-                goto err_rtc;
-        }
 
-        goto out;
 err_rtc:
-        kfree(info);
-        return ret;
-out:
         return ret;
 }
 
 static int max77686_rtc_remove(struct platform_device *pdev)
 {
-        struct max77686_rtc_info *info = platform_get_drvdata(pdev);
-
-        if (info) {
-                free_irq(info->virq, info);
-                rtc_device_unregister(info->rtc_dev);
-                kfree(info);
-        }
-
         return 0;
 }
 
@@ -594,11 +582,14 @@ static void max77686_rtc_shutdown(struct platform_device *pdev)
         for (i = 0; i < 3; i++) {
                 max77686_rtc_enable_wtsr(info, false);
                 regmap_read(info->max77686->rtc_regmap, MAX77686_WTSR_SMPL_CNTL, &val);
-                pr_info("%s: WTSR_SMPL reg(0x%02x)\n", __func__, val);
-                if (val & WTSR_EN_MASK)
-                        pr_emerg("%s: fail to disable WTSR\n", __func__);
-                else {
-                        pr_info("%s: success to disable WTSR\n", __func__);
+                dev_info(info->dev, "%s: WTSR_SMPL reg(0x%02x)\n", __func__,
+                                val);
+                if (val & WTSR_EN_MASK) {
+                        dev_emerg(info->dev, "%s: fail to disable WTSR\n",
+                                        __func__);
+                } else {
+                        dev_info(info->dev, "%s: success to disable WTSR\n",
+                                        __func__);
                         break;
                 }
         }
@@ -624,18 +615,8 @@ static struct platform_driver max77686_rtc_driver = {
         .id_table       = rtc_id,
 };
 
-static int __init max77686_rtc_init(void)
-{
-        return platform_driver_register(&max77686_rtc_driver);
-}
-module_init(max77686_rtc_init);
-
-static void __exit max77686_rtc_exit(void)
-{
-        platform_driver_unregister(&max77686_rtc_driver);
-}
-module_exit(max77686_rtc_exit);
+module_platform_driver(max77686_rtc_driver);
 
 MODULE_DESCRIPTION("Maxim MAX77686 RTC driver");
-MODULE_AUTHOR("<woong.byun@samsung.com>");
+MODULE_AUTHOR("Chiwoong Byun <woong.byun@samsung.com>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-max8907.c b/drivers/rtc/rtc-max8907.c
index 31ca8faf9f05..86afb797125d 100644
--- a/drivers/rtc/rtc-max8907.c
+++ b/drivers/rtc/rtc-max8907.c
@@ -190,7 +190,7 @@ static int max8907_rtc_probe(struct platform_device *pdev)
         rtc->max8907 = max8907;
         rtc->regmap = max8907->regmap_rtc;
 
-        rtc->rtc_dev = rtc_device_register("max8907-rtc", &pdev->dev,
+        rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8907-rtc",
                                         &max8907_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtc_dev)) {
                 ret = PTR_ERR(rtc->rtc_dev);
@@ -200,33 +200,21 @@ static int max8907_rtc_probe(struct platform_device *pdev)
 
         rtc->irq = regmap_irq_get_virq(max8907->irqc_rtc,
                                        MAX8907_IRQ_RTC_ALARM0);
-        if (rtc->irq < 0) {
-                ret = rtc->irq;
-                goto err_unregister;
-        }
+        if (rtc->irq < 0)
+                return rtc->irq;
 
         ret = devm_request_threaded_irq(&pdev->dev, rtc->irq, NULL,
                                 max8907_irq_handler,
                                 IRQF_ONESHOT, "max8907-alarm0", rtc);
-        if (ret < 0) {
+        if (ret < 0)
                 dev_err(&pdev->dev, "Failed to request IRQ%d: %d\n",
                         rtc->irq, ret);
-                goto err_unregister;
-        }
 
-        return 0;
-
-err_unregister:
-        rtc_device_unregister(rtc->rtc_dev);
         return ret;
 }
 
 static int max8907_rtc_remove(struct platform_device *pdev)
 {
-        struct max8907_rtc *rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtc->rtc_dev);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c
index a0c8265646d2..7c90f4e45e27 100644
--- a/drivers/rtc/rtc-max8925.c
+++ b/drivers/rtc/rtc-max8925.c
@@ -253,7 +253,8 @@ static int max8925_rtc_probe(struct platform_device *pdev)
         struct max8925_rtc_info *info;
         int ret;
 
-        info = kzalloc(sizeof(struct max8925_rtc_info), GFP_KERNEL);
+        info = devm_kzalloc(&pdev->dev, sizeof(struct max8925_rtc_info),
+                            GFP_KERNEL);
         if (!info)
                 return -ENOMEM;
         info->chip = chip;
@@ -261,12 +262,13 @@ static int max8925_rtc_probe(struct platform_device *pdev)
         info->dev = &pdev->dev;
         info->irq = platform_get_irq(pdev, 0);
 
-        ret = request_threaded_irq(info->irq, NULL, rtc_update_handler,
-                                   IRQF_ONESHOT, "rtc-alarm0", info);
+        ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
+                                        rtc_update_handler, IRQF_ONESHOT,
+                                        "rtc-alarm0", info);
         if (ret < 0) {
                 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
                         info->irq, ret);
-                goto out_irq;
+                goto err;
         }
 
         dev_set_drvdata(&pdev->dev, info);
@@ -275,32 +277,22 @@ static int max8925_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 1);
 
-        info->rtc_dev = rtc_device_register("max8925-rtc", &pdev->dev,
+        info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8925-rtc",
                                         &max8925_rtc_ops, THIS_MODULE);
         ret = PTR_ERR(info->rtc_dev);
         if (IS_ERR(info->rtc_dev)) {
                 dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
-                goto out_rtc;
+                goto err;
         }
 
         return 0;
-out_rtc:
+err:
         platform_set_drvdata(pdev, NULL);
-        free_irq(info->irq, info);
-out_irq:
-        kfree(info);
         return ret;
 }
 
 static int max8925_rtc_remove(struct platform_device *pdev)
 {
-        struct max8925_rtc_info *info = platform_get_drvdata(pdev);
-
-        if (info) {
-                free_irq(info->irq, info);
-                rtc_device_unregister(info->rtc_dev);
-                kfree(info);
-        }
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-max8997.c b/drivers/rtc/rtc-max8997.c
index 00e505b6bee3..5693619614f4 100644
--- a/drivers/rtc/rtc-max8997.c
+++ b/drivers/rtc/rtc-max8997.c
@@ -479,8 +479,8 @@ static int max8997_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 1);
 
-        info->rtc_dev = rtc_device_register("max8997-rtc", &pdev->dev,
-                        &max8997_rtc_ops, THIS_MODULE);
+        info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8997-rtc",
+                                        &max8997_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(info->rtc_dev)) {
                 ret = PTR_ERR(info->rtc_dev);
@@ -491,6 +491,7 @@ static int max8997_rtc_probe(struct platform_device *pdev)
         virq = irq_create_mapping(max8997->irq_domain, MAX8997_PMICIRQ_RTCA1);
         if (!virq) {
                 dev_err(&pdev->dev, "Failed to create mapping alarm IRQ\n");
+                ret = -ENXIO;
                 goto err_out;
         }
         info->virq = virq;
@@ -498,26 +499,16 @@ static int max8997_rtc_probe(struct platform_device *pdev)
         ret = devm_request_threaded_irq(&pdev->dev, virq, NULL,
                                 max8997_rtc_alarm_irq, 0,
                                 "rtc-alarm0", info);
-        if (ret < 0) {
+        if (ret < 0)
                 dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
                         info->virq, ret);
-                goto err_out;
-        }
-
-        return ret;
 
 err_out:
-        rtc_device_unregister(info->rtc_dev);
         return ret;
 }
 
 static int max8997_rtc_remove(struct platform_device *pdev)
 {
-        struct max8997_rtc_info *info = platform_get_drvdata(pdev);
-
-        if (info)
-                rtc_device_unregister(info->rtc_dev);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-max8998.c b/drivers/rtc/rtc-max8998.c
index 8f234a075e8f..48b6612fae7f 100644
--- a/drivers/rtc/rtc-max8998.c
+++ b/drivers/rtc/rtc-max8998.c
@@ -256,7 +256,8 @@ static int max8998_rtc_probe(struct platform_device *pdev)
         struct max8998_rtc_info *info;
         int ret;
 
-        info = kzalloc(sizeof(struct max8998_rtc_info), GFP_KERNEL);
+        info = devm_kzalloc(&pdev->dev, sizeof(struct max8998_rtc_info),
+                        GFP_KERNEL);
         if (!info)
                 return -ENOMEM;
 
@@ -267,7 +268,7 @@ static int max8998_rtc_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, info);
 
-        info->rtc_dev = rtc_device_register("max8998-rtc", &pdev->dev,
+        info->rtc_dev = devm_rtc_device_register(&pdev->dev, "max8998-rtc",
                         &max8998_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(info->rtc_dev)) {
@@ -276,8 +277,8 @@ static int max8998_rtc_probe(struct platform_device *pdev)
                 goto out_rtc;
         }
 
-        ret = request_threaded_irq(info->irq, NULL, max8998_rtc_alarm_irq, 0,
-                        "rtc-alarm0", info);
+        ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
+                                max8998_rtc_alarm_irq, 0, "rtc-alarm0", info);
 
         if (ret < 0)
                 dev_err(&pdev->dev, "Failed to request alarm IRQ: %d: %d\n",
@@ -294,20 +295,11 @@ static int max8998_rtc_probe(struct platform_device *pdev)
 
 out_rtc:
         platform_set_drvdata(pdev, NULL);
-        kfree(info);
         return ret;
 }
 
 static int max8998_rtc_remove(struct platform_device *pdev)
 {
-        struct max8998_rtc_info *info = platform_get_drvdata(pdev);
-
-        if (info) {
-                free_irq(info->irq, info);
-                rtc_device_unregister(info->rtc_dev);
-                kfree(info);
-        }
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-mc13xxx.c b/drivers/rtc/rtc-mc13xxx.c
index 2643d8874925..7a8ed27a5f2e 100644
--- a/drivers/rtc/rtc-mc13xxx.c
+++ b/drivers/rtc/rtc-mc13xxx.c
@@ -316,7 +316,7 @@ static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
         struct mc13xxx *mc13xxx;
         int rtcrst_pending;
 
-        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+        priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
         if (!priv)
                 return -ENOMEM;
 
@@ -351,8 +351,8 @@ static int __init mc13xxx_rtc_probe(struct platform_device *pdev)
 
         mc13xxx_unlock(mc13xxx);
 
-        priv->rtc = rtc_device_register(pdev->name,
-                        &pdev->dev, &mc13xxx_rtc_ops, THIS_MODULE);
+        priv->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+                                        &mc13xxx_rtc_ops, THIS_MODULE);
         if (IS_ERR(priv->rtc)) {
                 ret = PTR_ERR(priv->rtc);
 
@@ -372,7 +372,6 @@ err_reset_irq_request:
                 mc13xxx_unlock(mc13xxx);
 
                 platform_set_drvdata(pdev, NULL);
-                kfree(priv);
         }
 
         return ret;
@@ -384,8 +383,6 @@ static int __exit mc13xxx_rtc_remove(struct platform_device *pdev)
 
         mc13xxx_lock(priv->mc13xxx);
 
-        rtc_device_unregister(priv->rtc);
-
         mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_TODA, priv);
         mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_1HZ, priv);
         mc13xxx_irq_free(priv->mc13xxx, MC13XXX_IRQ_RTCRST, priv);
@@ -394,8 +391,6 @@ static int __exit mc13xxx_rtc_remove(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, NULL);
 
-        kfree(priv);
-
         return 0;
 }
 
@@ -420,17 +415,7 @@ static struct platform_driver mc13xxx_rtc_driver = {
         },
 };
 
-static int __init mc13xxx_rtc_init(void)
-{
-        return platform_driver_probe(&mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
-}
-module_init(mc13xxx_rtc_init);
-
-static void __exit mc13xxx_rtc_exit(void)
-{
-        platform_driver_unregister(&mc13xxx_rtc_driver);
-}
-module_exit(mc13xxx_rtc_exit);
+module_platform_driver_probe(mc13xxx_rtc_driver, &mc13xxx_rtc_probe);
 
 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
diff --git a/drivers/rtc/rtc-msm6242.c b/drivers/rtc/rtc-msm6242.c
index fcb113c11122..771f86a05d14 100644
--- a/drivers/rtc/rtc-msm6242.c
+++ b/drivers/rtc/rtc-msm6242.c
@@ -194,30 +194,28 @@ static const struct rtc_class_ops msm6242_rtc_ops = {
         .set_time       = msm6242_set_time,
 };
 
-static int __init msm6242_rtc_probe(struct platform_device *dev)
+static int __init msm6242_rtc_probe(struct platform_device *pdev)
 {
         struct resource *res;
         struct msm6242_priv *priv;
         struct rtc_device *rtc;
         int error;
 
-        res = platform_get_resource(dev, IORESOURCE_MEM, 0);
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res)
                 return -ENODEV;
 
-        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+        priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
         if (!priv)
                 return -ENOMEM;
 
-        priv->regs = ioremap(res->start, resource_size(res));
-        if (!priv->regs) {
-                error = -ENOMEM;
-                goto out_free_priv;
-        }
-        platform_set_drvdata(dev, priv);
+        priv->regs = devm_ioremap(&pdev->dev, res->start, resource_size(res));
+        if (!priv->regs)
+                return -ENOMEM;
+        platform_set_drvdata(pdev, priv);
 
-        rtc = rtc_device_register("rtc-msm6242", &dev->dev, &msm6242_rtc_ops,
-                                  THIS_MODULE);
+        rtc = devm_rtc_device_register(&pdev->dev, "rtc-msm6242",
+                                &msm6242_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
                 error = PTR_ERR(rtc);
                 goto out_unmap;
@@ -227,20 +225,12 @@ static int __init msm6242_rtc_probe(struct platform_device *dev)
         return 0;
 
 out_unmap:
-        platform_set_drvdata(dev, NULL);
-        iounmap(priv->regs);
-out_free_priv:
-        kfree(priv);
+        platform_set_drvdata(pdev, NULL);
         return error;
 }
 
-static int __exit msm6242_rtc_remove(struct platform_device *dev)
+static int __exit msm6242_rtc_remove(struct platform_device *pdev)
 {
-        struct msm6242_priv *priv = platform_get_drvdata(dev);
-
-        rtc_device_unregister(priv->rtc);
-        iounmap(priv->regs);
-        kfree(priv);
         return 0;
 }
 
@@ -252,18 +242,7 @@ static struct platform_driver msm6242_rtc_driver = {
         .remove = __exit_p(msm6242_rtc_remove),
 };
 
-static int __init msm6242_rtc_init(void)
-{
-        return platform_driver_probe(&msm6242_rtc_driver, msm6242_rtc_probe);
-}
-
-static void __exit msm6242_rtc_fini(void)
-{
-        platform_driver_unregister(&msm6242_rtc_driver);
-}
-
-module_init(msm6242_rtc_init);
-module_exit(msm6242_rtc_fini);
+module_platform_driver_probe(msm6242_rtc_driver, msm6242_rtc_probe);
 
 MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index 8f87fec27ce7..baab802f2153 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -217,7 +217,7 @@ static const struct rtc_class_ops mv_rtc_alarm_ops = {
         .alarm_irq_enable = mv_rtc_alarm_irq_enable,
 };
 
-static int mv_rtc_probe(struct platform_device *pdev)
+static int __init mv_rtc_probe(struct platform_device *pdev)
 {
         struct resource *res;
         struct rtc_plat_data *pdata;
@@ -272,12 +272,13 @@ static int mv_rtc_probe(struct platform_device *pdev)
 
         if (pdata->irq >= 0) {
                 device_init_wakeup(&pdev->dev, 1);
-                pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
+                pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                                  &mv_rtc_alarm_ops,
                                                  THIS_MODULE);
-        } else
-                pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        } else {
+                pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                                  &mv_rtc_ops, THIS_MODULE);
+        }
         if (IS_ERR(pdata->rtc)) {
                 ret = PTR_ERR(pdata->rtc);
                 goto out;
@@ -308,7 +309,6 @@ static int __exit mv_rtc_remove(struct platform_device *pdev)
         if (pdata->irq >= 0)
                 device_init_wakeup(&pdev->dev, 0);
 
-        rtc_device_unregister(pdata->rtc);
         if (!IS_ERR(pdata->clk))
                 clk_disable_unprepare(pdata->clk);
 
@@ -331,18 +331,7 @@ static struct platform_driver mv_rtc_driver = {
         },
 };
 
-static __init int mv_init(void)
-{
-        return platform_driver_probe(&mv_rtc_driver, mv_rtc_probe);
-}
-
-static __exit void mv_exit(void)
-{
-        platform_driver_unregister(&mv_rtc_driver);
-}
-
-module_init(mv_init);
-module_exit(mv_exit);
+module_platform_driver_probe(mv_rtc_driver, mv_rtc_probe);
 
 MODULE_AUTHOR("Saeed Bishara <saeed@marvell.com>");
 MODULE_DESCRIPTION("Marvell RTC driver");
diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index 1c3ef7289565..9a3895bc4f4d 100644
--- a/drivers/rtc/rtc-mxc.c
+++ b/drivers/rtc/rtc-mxc.c
@@ -439,7 +439,7 @@ static int mxc_rtc_probe(struct platform_device *pdev)
         if (pdata->irq >=0)
                 device_init_wakeup(&pdev->dev, 1);
 
-        rtc = rtc_device_register(pdev->name, &pdev->dev, &mxc_rtc_ops,
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &mxc_rtc_ops,
                                   THIS_MODULE);
         if (IS_ERR(rtc)) {
                 ret = PTR_ERR(rtc);
@@ -464,15 +464,13 @@ static int mxc_rtc_remove(struct platform_device *pdev)
 {
         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
-        rtc_device_unregister(pdata->rtc);
-
         clk_disable_unprepare(pdata->clk);
         platform_set_drvdata(pdev, NULL);
 
         return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int mxc_rtc_suspend(struct device *dev)
 {
         struct rtc_plat_data *pdata = dev_get_drvdata(dev);
@@ -492,19 +490,14 @@ static int mxc_rtc_resume(struct device *dev)
 
         return 0;
 }
-
-static struct dev_pm_ops mxc_rtc_pm_ops = {
-        .suspend        = mxc_rtc_suspend,
-        .resume         = mxc_rtc_resume,
-};
 #endif
 
+static SIMPLE_DEV_PM_OPS(mxc_rtc_pm_ops, mxc_rtc_suspend, mxc_rtc_resume);
+
 static struct platform_driver mxc_rtc_driver = {
         .driver = {
                    .name        = "mxc_rtc",
-#ifdef CONFIG_PM
                    .pm          = &mxc_rtc_pm_ops,
-#endif
                    .owner       = THIS_MODULE,
         },
         .id_table = imx_rtc_devtype,
diff --git a/drivers/rtc/rtc-nuc900.c b/drivers/rtc/rtc-nuc900.c
index a63680850fef..f5dfb6e5e7d9 100644
--- a/drivers/rtc/rtc-nuc900.c
+++ b/drivers/rtc/rtc-nuc900.c
@@ -222,13 +222,13 @@ static struct rtc_class_ops nuc900_rtc_ops = {
         .alarm_irq_enable = nuc900_alarm_irq_enable,
 };
 
-static int nuc900_rtc_probe(struct platform_device *pdev)
+static int __init nuc900_rtc_probe(struct platform_device *pdev)
 {
         struct resource *res;
         struct nuc900_rtc *nuc900_rtc;
-        int err = 0;
 
-        nuc900_rtc = kzalloc(sizeof(struct nuc900_rtc), GFP_KERNEL);
+        nuc900_rtc = devm_kzalloc(&pdev->dev, sizeof(struct nuc900_rtc),
+                                GFP_KERNEL);
         if (!nuc900_rtc) {
                 dev_err(&pdev->dev, "kzalloc nuc900_rtc failed\n");
                 return -ENOMEM;
@@ -236,93 +236,51 @@ static int nuc900_rtc_probe(struct platform_device *pdev)
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res) {
                 dev_err(&pdev->dev, "platform_get_resource failed\n");
-                err = -ENXIO;
-                goto fail1;
+                return -ENXIO;
         }
 
-        if (!request_mem_region(res->start, resource_size(res),
-                                pdev->name)) {
-                dev_err(&pdev->dev, "request_mem_region failed\n");
-                err = -EBUSY;
-                goto fail1;
-        }
-
-        nuc900_rtc->rtc_reg = ioremap(res->start, resource_size(res));
-        if (!nuc900_rtc->rtc_reg) {
-                dev_err(&pdev->dev, "ioremap rtc_reg failed\n");
-                err = -ENOMEM;
-                goto fail2;
-        }
+        nuc900_rtc->rtc_reg = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(nuc900_rtc->rtc_reg))
+                return PTR_ERR(nuc900_rtc->rtc_reg);
 
         platform_set_drvdata(pdev, nuc900_rtc);
 
-        nuc900_rtc->rtcdev = rtc_device_register(pdev->name, &pdev->dev,
+        nuc900_rtc->rtcdev = devm_rtc_device_register(&pdev->dev, pdev->name,
                                                 &nuc900_rtc_ops, THIS_MODULE);
         if (IS_ERR(nuc900_rtc->rtcdev)) {
                 dev_err(&pdev->dev, "rtc device register failed\n");
-                err = PTR_ERR(nuc900_rtc->rtcdev);
-                goto fail3;
+                return PTR_ERR(nuc900_rtc->rtcdev);
         }
 
         __raw_writel(__raw_readl(nuc900_rtc->rtc_reg + REG_RTC_TSSR) | MODE24,
                                         nuc900_rtc->rtc_reg + REG_RTC_TSSR);
 
         nuc900_rtc->irq_num = platform_get_irq(pdev, 0);
-        if (request_irq(nuc900_rtc->irq_num, nuc900_rtc_interrupt,
-                                0, "nuc900rtc", nuc900_rtc)) {
+        if (devm_request_irq(&pdev->dev, nuc900_rtc->irq_num,
+                        nuc900_rtc_interrupt, 0, "nuc900rtc", nuc900_rtc)) {
                 dev_err(&pdev->dev, "NUC900 RTC request irq failed\n");
-                err = -EBUSY;
-                goto fail4;
+                return -EBUSY;
         }
 
         return 0;
-
-fail4:  rtc_device_unregister(nuc900_rtc->rtcdev);
-fail3:  iounmap(nuc900_rtc->rtc_reg);
-fail2:  release_mem_region(res->start, resource_size(res));
-fail1:  kfree(nuc900_rtc);
-        return err;
 }
 
-static int nuc900_rtc_remove(struct platform_device *pdev)
+static int __exit nuc900_rtc_remove(struct platform_device *pdev)
 {
-        struct nuc900_rtc *nuc900_rtc = platform_get_drvdata(pdev);
-        struct resource *res;
-
-        free_irq(nuc900_rtc->irq_num, nuc900_rtc);
-        rtc_device_unregister(nuc900_rtc->rtcdev);
-        iounmap(nuc900_rtc->rtc_reg);
-
-        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        release_mem_region(res->start, resource_size(res));
-
-        kfree(nuc900_rtc);
-
         platform_set_drvdata(pdev, NULL);
 
         return 0;
 }
 
 static struct platform_driver nuc900_rtc_driver = {
-        .remove         = nuc900_rtc_remove,
+        .remove         = __exit_p(nuc900_rtc_remove),
         .driver         = {
                 .name   = "nuc900-rtc",
                 .owner  = THIS_MODULE,
         },
 };
 
-static int __init nuc900_rtc_init(void)
-{
-        return platform_driver_probe(&nuc900_rtc_driver, nuc900_rtc_probe);
-}
-
-static void __exit nuc900_rtc_exit(void)
-{
-        platform_driver_unregister(&nuc900_rtc_driver);
-}
-
-module_init(nuc900_rtc_init);
-module_exit(nuc900_rtc_exit);
+module_platform_driver_probe(nuc900_rtc_driver, nuc900_rtc_probe);
 
 MODULE_AUTHOR("Wan ZongShun <mcuos.com@gmail.com>");
 MODULE_DESCRIPTION("nuc910/nuc920 RTC driver");
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index 600971407aac..4e1bdb832e37 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -324,7 +324,7 @@ MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
 
 static int __init omap_rtc_probe(struct platform_device *pdev)
 {
-        struct resource         *res, *mem;
+        struct resource         *res;
         struct rtc_device       *rtc;
         u8                      reg, new_ctrl;
         const struct platform_device_id *id_entry;
@@ -352,18 +352,9 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                 return -ENOENT;
         }
 
-        mem = request_mem_region(res->start, resource_size(res), pdev->name);
-        if (!mem) {
-                pr_debug("%s: RTC registers at %08x are not free\n",
-                        pdev->name, res->start);
-                return -EBUSY;
-        }
-
-        rtc_base = ioremap(res->start, resource_size(res));
-        if (!rtc_base) {
-                pr_debug("%s: RTC registers can't be mapped\n", pdev->name);
-                goto fail;
-        }
+        rtc_base = devm_ioremap_resource(&pdev->dev, res);
+        if (IS_ERR(rtc_base))
+                return PTR_ERR(rtc_base);
 
         /* Enable the clock/module so that we can access the registers */
         pm_runtime_enable(&pdev->dev);
@@ -375,7 +366,7 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                 rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG);
         }
 
-        rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                         &omap_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
                 pr_debug("%s: can't register RTC device, err %ld\n",
@@ -383,7 +374,6 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                 goto fail0;
         }
         platform_set_drvdata(pdev, rtc);
-        dev_set_drvdata(&rtc->dev, mem);
 
         /* clear pending irqs, and set 1/second periodic,
          * which we'll use instead of update irqs
@@ -401,18 +391,18 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                 rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
 
         /* handle periodic and alarm irqs */
-        if (request_irq(omap_rtc_timer, rtc_irq, 0,
+        if (devm_request_irq(&pdev->dev, omap_rtc_timer, rtc_irq, 0,
                         dev_name(&rtc->dev), rtc)) {
                 pr_debug("%s: RTC timer interrupt IRQ%d already claimed\n",
                         pdev->name, omap_rtc_timer);
-                goto fail1;
+                goto fail0;
         }
         if ((omap_rtc_timer != omap_rtc_alarm) &&
-                (request_irq(omap_rtc_alarm, rtc_irq, 0,
+                (devm_request_irq(&pdev->dev, omap_rtc_alarm, rtc_irq, 0,
                         dev_name(&rtc->dev), rtc))) {
                 pr_debug("%s: RTC alarm interrupt IRQ%d already claimed\n",
                         pdev->name, omap_rtc_alarm);
-                goto fail2;
+                goto fail0;
         }
 
         /* On boards with split power, RTC_ON_NOFF won't reset the RTC */
@@ -446,25 +436,16 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
 
         return 0;
 
-fail2:
-        free_irq(omap_rtc_timer, rtc);
-fail1:
-        rtc_device_unregister(rtc);
 fail0:
         if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER))
                 rtc_writel(0, OMAP_RTC_KICK0_REG);
         pm_runtime_put_sync(&pdev->dev);
         pm_runtime_disable(&pdev->dev);
-        iounmap(rtc_base);
-fail:
-        release_mem_region(mem->start, resource_size(mem));
         return -EIO;
 }
 
 static int __exit omap_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device       *rtc = platform_get_drvdata(pdev);
-        struct resource         *mem = dev_get_drvdata(&rtc->dev);
         const struct platform_device_id *id_entry =
                                 platform_get_device_id(pdev);
 
@@ -473,12 +454,6 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
         /* leave rtc running, but disable irqs */
         rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
 
-        free_irq(omap_rtc_timer, rtc);
-
-        if (omap_rtc_timer != omap_rtc_alarm)
-                free_irq(omap_rtc_alarm, rtc);
-
-        rtc_device_unregister(rtc);
         if (id_entry && (id_entry->driver_data & OMAP_RTC_HAS_KICKER))
                 rtc_writel(0, OMAP_RTC_KICK0_REG);
 
@@ -486,16 +461,13 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
         pm_runtime_put_sync(&pdev->dev);
         pm_runtime_disable(&pdev->dev);
 
-        iounmap(rtc_base);
-        release_mem_region(mem->start, resource_size(mem));
         return 0;
 }
 
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
 static u8 irqstat;
 
-static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+static int omap_rtc_suspend(struct device *dev)
 {
         irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
 
@@ -503,34 +475,32 @@ static int omap_rtc_suspend(struct platform_device *pdev, pm_message_t state)
          * source, and in fact this enable() call is just saving a flag
          * that's never used...
          */
-        if (device_may_wakeup(&pdev->dev))
+        if (device_may_wakeup(dev))
                 enable_irq_wake(omap_rtc_alarm);
         else
                 rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
 
         /* Disable the clock/module */
-        pm_runtime_put_sync(&pdev->dev);
+        pm_runtime_put_sync(dev);
 
         return 0;
 }
 
-static int omap_rtc_resume(struct platform_device *pdev)
+static int omap_rtc_resume(struct device *dev)
 {
         /* Enable the clock/module so that we can access the registers */
-        pm_runtime_get_sync(&pdev->dev);
+        pm_runtime_get_sync(dev);
 
-        if (device_may_wakeup(&pdev->dev))
+        if (device_may_wakeup(dev))
                 disable_irq_wake(omap_rtc_alarm);
         else
                 rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
         return 0;
 }
-
-#else
-#define omap_rtc_suspend NULL
-#define omap_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume);
+
 static void omap_rtc_shutdown(struct platform_device *pdev)
 {
         rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
@@ -539,28 +509,17 @@ static void omap_rtc_shutdown(struct platform_device *pdev)
 MODULE_ALIAS("platform:omap_rtc");
 static struct platform_driver omap_rtc_driver = {
         .remove         = __exit_p(omap_rtc_remove),
-        .suspend        = omap_rtc_suspend,
-        .resume         = omap_rtc_resume,
         .shutdown       = omap_rtc_shutdown,
         .driver         = {
                 .name   = DRIVER_NAME,
                 .owner  = THIS_MODULE,
+                .pm     = &omap_rtc_pm_ops,
                 .of_match_table = of_match_ptr(omap_rtc_of_match),
         },
         .id_table       = omap_rtc_devtype,
 };
 
-static int __init rtc_init(void)
-{
-        return platform_driver_probe(&omap_rtc_driver, omap_rtc_probe);
-}
-module_init(rtc_init);
-
-static void __exit rtc_exit(void)
-{
-        platform_driver_unregister(&omap_rtc_driver);
-}
-module_exit(rtc_exit);
+module_platform_driver_probe(omap_rtc_driver, omap_rtc_probe);
 
 MODULE_AUTHOR("George G. Davis (and others)");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-palmas.c b/drivers/rtc/rtc-palmas.c
index 59c42986254e..50204d474eb7 100644
--- a/drivers/rtc/rtc-palmas.c
+++ b/drivers/rtc/rtc-palmas.c
@@ -30,6 +30,7 @@
 #include <linux/kernel.h>
 #include <linux/mfd/palmas.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/rtc.h>
 #include <linux/types.h>
 #include <linux/platform_device.h>
@@ -264,7 +265,7 @@ static int palmas_rtc_probe(struct platform_device *pdev)
 
         palmas_rtc->irq = platform_get_irq(pdev, 0);
 
-        palmas_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        palmas_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                 &palmas_rtc_ops, THIS_MODULE);
         if (IS_ERR(palmas_rtc->rtc)) {
                 ret = PTR_ERR(palmas_rtc->rtc);
@@ -272,14 +273,13 @@ static int palmas_rtc_probe(struct platform_device *pdev)
                 return ret;
         }
 
-        ret = request_threaded_irq(palmas_rtc->irq, NULL,
+        ret = devm_request_threaded_irq(&pdev->dev, palmas_rtc->irq, NULL,
                         palmas_rtc_interrupt,
                         IRQF_TRIGGER_LOW | IRQF_ONESHOT |
                         IRQF_EARLY_RESUME,
                         dev_name(&pdev->dev), palmas_rtc);
         if (ret < 0) {
                 dev_err(&pdev->dev, "IRQ request failed, err = %d\n", ret);
-                rtc_device_unregister(palmas_rtc->rtc);
                 return ret;
         }
 
@@ -289,11 +289,7 @@ static int palmas_rtc_probe(struct platform_device *pdev)
 
 static int palmas_rtc_remove(struct platform_device *pdev)
 {
-        struct palmas_rtc *palmas_rtc = platform_get_drvdata(pdev);
-
         palmas_rtc_alarm_irq_enable(&pdev->dev, 0);
-        free_irq(palmas_rtc->irq, palmas_rtc);
-        rtc_device_unregister(palmas_rtc->rtc);
         return 0;
 }
 
@@ -321,6 +317,14 @@ static const struct dev_pm_ops palmas_rtc_pm_ops = {
         SET_SYSTEM_SLEEP_PM_OPS(palmas_rtc_suspend, palmas_rtc_resume)
 };
 
+#ifdef CONFIG_OF
+static struct of_device_id of_palmas_rtc_match[] = {
+        { .compatible = "ti,palmas-rtc"},
+        { },
+};
+MODULE_DEVICE_TABLE(of, of_palmas_rtc_match);
+#endif
+
 static struct platform_driver palmas_rtc_driver = {
         .probe          = palmas_rtc_probe,
         .remove         = palmas_rtc_remove,
@@ -328,6 +332,7 @@ static struct platform_driver palmas_rtc_driver = {
                 .owner  = THIS_MODULE,
                 .name   = "palmas-rtc",
                 .pm     = &palmas_rtc_pm_ops,
+                .of_match_table = of_match_ptr(of_palmas_rtc_match),
         },
 };
 
diff --git a/drivers/rtc/rtc-pcap.c b/drivers/rtc/rtc-pcap.c
index e0019cd0bf71..539a90b98bc5 100644
--- a/drivers/rtc/rtc-pcap.c
+++ b/drivers/rtc/rtc-pcap.c
@@ -139,13 +139,14 @@ static const struct rtc_class_ops pcap_rtc_ops = {
         .alarm_irq_enable = pcap_rtc_alarm_irq_enable,
 };
 
-static int pcap_rtc_probe(struct platform_device *pdev)
+static int __init pcap_rtc_probe(struct platform_device *pdev)
 {
         struct pcap_rtc *pcap_rtc;
         int timer_irq, alarm_irq;
         int err = -ENOMEM;
 
-        pcap_rtc = kmalloc(sizeof(struct pcap_rtc), GFP_KERNEL);
+        pcap_rtc = devm_kzalloc(&pdev->dev, sizeof(struct pcap_rtc),
+                                GFP_KERNEL);
         if (!pcap_rtc)
                 return err;
 
@@ -153,68 +154,46 @@ static int pcap_rtc_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, pcap_rtc);
 
-        pcap_rtc->rtc = rtc_device_register("pcap", &pdev->dev,
-                                  &pcap_rtc_ops, THIS_MODULE);
+        pcap_rtc->rtc = devm_rtc_device_register(&pdev->dev, "pcap",
+                                        &pcap_rtc_ops, THIS_MODULE);
         if (IS_ERR(pcap_rtc->rtc)) {
                 err = PTR_ERR(pcap_rtc->rtc);
-                goto fail_rtc;
+                goto fail;
         }
 
-
         timer_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ);
         alarm_irq = pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA);
 
-        err = request_irq(timer_irq, pcap_rtc_irq, 0, "RTC Timer", pcap_rtc);
+        err = devm_request_irq(&pdev->dev, timer_irq, pcap_rtc_irq, 0,
+                                "RTC Timer", pcap_rtc);
         if (err)
-                goto fail_timer;
+                goto fail;
 
-        err = request_irq(alarm_irq, pcap_rtc_irq, 0, "RTC Alarm", pcap_rtc);
+        err = devm_request_irq(&pdev->dev, alarm_irq, pcap_rtc_irq, 0,
+                                "RTC Alarm", pcap_rtc);
         if (err)
-                goto fail_alarm;
+                goto fail;
 
         return 0;
-fail_alarm:
-        free_irq(timer_irq, pcap_rtc);
-fail_timer:
-        rtc_device_unregister(pcap_rtc->rtc);
-fail_rtc:
+fail:
         platform_set_drvdata(pdev, NULL);
-        kfree(pcap_rtc);
         return err;
 }
 
-static int pcap_rtc_remove(struct platform_device *pdev)
+static int __exit pcap_rtc_remove(struct platform_device *pdev)
 {
-        struct pcap_rtc *pcap_rtc = platform_get_drvdata(pdev);
-
-        free_irq(pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_1HZ), pcap_rtc);
-        free_irq(pcap_to_irq(pcap_rtc->pcap, PCAP_IRQ_TODA), pcap_rtc);
-        rtc_device_unregister(pcap_rtc->rtc);
-        kfree(pcap_rtc);
-
         return 0;
 }
 
 static struct platform_driver pcap_rtc_driver = {
-        .remove = pcap_rtc_remove,
+        .remove = __exit_p(pcap_rtc_remove),
         .driver = {
                 .name  = "pcap-rtc",
                 .owner = THIS_MODULE,
         },
 };
 
-static int __init rtc_pcap_init(void)
-{
-        return platform_driver_probe(&pcap_rtc_driver, pcap_rtc_probe);
-}
-
-static void __exit rtc_pcap_exit(void)
-{
-        platform_driver_unregister(&pcap_rtc_driver);
-}
-
-module_init(rtc_pcap_init);
-module_exit(rtc_pcap_exit);
+module_platform_driver_probe(pcap_rtc_driver, pcap_rtc_probe);
 
 MODULE_DESCRIPTION("Motorola pcap rtc driver");
 MODULE_AUTHOR("guiming zhuo <gmzhuo@gmail.com>");
diff --git a/drivers/rtc/rtc-pcf2123.c b/drivers/rtc/rtc-pcf2123.c
index 02b742afa761..796a6c5067dd 100644
--- a/drivers/rtc/rtc-pcf2123.c
+++ b/drivers/rtc/rtc-pcf2123.c
@@ -226,7 +226,8 @@ static int pcf2123_probe(struct spi_device *spi)
         u8 txbuf[2], rxbuf[2];
         int ret, i;
 
-        pdata = kzalloc(sizeof(struct pcf2123_plat_data), GFP_KERNEL);
+        pdata = devm_kzalloc(&spi->dev, sizeof(struct pcf2123_plat_data),
+                                GFP_KERNEL);
         if (!pdata)
                 return -ENOMEM;
         spi->dev.platform_data = pdata;
@@ -265,6 +266,7 @@ static int pcf2123_probe(struct spi_device *spi)
 
         if (!(rxbuf[0] & 0x20)) {
                 dev_err(&spi->dev, "chip not found\n");
+                ret = -ENODEV;
                 goto kfree_exit;
         }
 
@@ -281,7 +283,7 @@ static int pcf2123_probe(struct spi_device *spi)
         pcf2123_delay_trec();
 
         /* Finalize the initialization */
-        rtc = rtc_device_register(pcf2123_driver.driver.name, &spi->dev,
+        rtc = devm_rtc_device_register(&spi->dev, pcf2123_driver.driver.name,
                         &pcf2123_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc)) {
@@ -314,7 +316,6 @@ sysfs_exit:
                 device_remove_file(&spi->dev, &pdata->regs[i].attr);
 
 kfree_exit:
-        kfree(pdata);
         spi->dev.platform_data = NULL;
         return ret;
 }
@@ -325,15 +326,10 @@ static int pcf2123_remove(struct spi_device *spi)
         int i;
 
         if (pdata) {
-                struct rtc_device *rtc = pdata->rtc;
-
-                if (rtc)
-                        rtc_device_unregister(rtc);
                 for (i = 0; i < 16; i++)
                         if (pdata->regs[i].name[0])
                                 device_remove_file(&spi->dev,
                                                    &pdata->regs[i].attr);
-                kfree(pdata);
         }
 
         return 0;
diff --git a/drivers/rtc/rtc-pcf50633.c b/drivers/rtc/rtc-pcf50633.c
index e9f3135d305f..e6b6911c8e05 100644
--- a/drivers/rtc/rtc-pcf50633.c
+++ b/drivers/rtc/rtc-pcf50633.c
@@ -252,20 +252,17 @@ static int pcf50633_rtc_probe(struct platform_device *pdev)
 {
         struct pcf50633_rtc *rtc;
 
-        rtc = kzalloc(sizeof(*rtc), GFP_KERNEL);
+        rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
         if (!rtc)
                 return -ENOMEM;
 
         rtc->pcf = dev_to_pcf50633(pdev->dev.parent);
         platform_set_drvdata(pdev, rtc);
-        rtc->rtc_dev = rtc_device_register("pcf50633-rtc", &pdev->dev,
+        rtc->rtc_dev = devm_rtc_device_register(&pdev->dev, "pcf50633-rtc",
                                 &pcf50633_rtc_ops, THIS_MODULE);
 
-        if (IS_ERR(rtc->rtc_dev)) {
-                int ret =  PTR_ERR(rtc->rtc_dev);
-                kfree(rtc);
-                return ret;
-        }
+        if (IS_ERR(rtc->rtc_dev))
+                return PTR_ERR(rtc->rtc_dev);
 
         pcf50633_register_irq(rtc->pcf, PCF50633_IRQ_ALARM,
                                         pcf50633_rtc_irq, rtc);
@@ -277,12 +274,8 @@ static int pcf50633_rtc_remove(struct platform_device *pdev)
         struct pcf50633_rtc *rtc;
 
         rtc = platform_get_drvdata(pdev);
-
         pcf50633_free_irq(rtc->pcf, PCF50633_IRQ_ALARM);
 
-        rtc_device_unregister(rtc->rtc_dev);
-        kfree(rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-pcf8523.c b/drivers/rtc/rtc-pcf8523.c
index 889e3160e701..305c9515e5bb 100644
--- a/drivers/rtc/rtc-pcf8523.c
+++ b/drivers/rtc/rtc-pcf8523.c
@@ -307,7 +307,7 @@ static int pcf8523_probe(struct i2c_client *client,
         if (err < 0)
                 return err;
 
-        pcf->rtc = rtc_device_register(DRIVER_NAME, &client->dev,
+        pcf->rtc = devm_rtc_device_register(&client->dev, DRIVER_NAME,
                                        &pcf8523_rtc_ops, THIS_MODULE);
         if (IS_ERR(pcf->rtc))
                 return PTR_ERR(pcf->rtc);
@@ -319,10 +319,6 @@ static int pcf8523_probe(struct i2c_client *client,
 
 static int pcf8523_remove(struct i2c_client *client)
 {
-        struct pcf8523 *pcf = i2c_get_clientdata(client);
-
-        rtc_device_unregister(pcf->rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index f7daf18a112e..97b354a26a44 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -245,14 +245,13 @@ static int pcf8563_probe(struct i2c_client *client,
 {
         struct pcf8563 *pcf8563;
 
-        int err = 0;
-
         dev_dbg(&client->dev, "%s\n", __func__);
 
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
                 return -ENODEV;
 
-        pcf8563 = kzalloc(sizeof(struct pcf8563), GFP_KERNEL);
+        pcf8563 = devm_kzalloc(&client->dev, sizeof(struct pcf8563),
+                                GFP_KERNEL);
         if (!pcf8563)
                 return -ENOMEM;
 
@@ -260,31 +259,18 @@ static int pcf8563_probe(struct i2c_client *client,
 
         i2c_set_clientdata(client, pcf8563);
 
-        pcf8563->rtc = rtc_device_register(pcf8563_driver.driver.name,
-                                &client->dev, &pcf8563_rtc_ops, THIS_MODULE);
+        pcf8563->rtc = devm_rtc_device_register(&client->dev,
+                                pcf8563_driver.driver.name,
+                                &pcf8563_rtc_ops, THIS_MODULE);
 
-        if (IS_ERR(pcf8563->rtc)) {
-                err = PTR_ERR(pcf8563->rtc);
-                goto exit_kfree;
-        }
+        if (IS_ERR(pcf8563->rtc))
+                return PTR_ERR(pcf8563->rtc);
 
         return 0;
-
-exit_kfree:
-        kfree(pcf8563);
-
-        return err;
 }
 
 static int pcf8563_remove(struct i2c_client *client)
 {
-        struct pcf8563 *pcf8563 = i2c_get_clientdata(client);
-
-        if (pcf8563->rtc)
-                rtc_device_unregister(pcf8563->rtc);
-
-        kfree(pcf8563);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-pcf8583.c b/drivers/rtc/rtc-pcf8583.c
index 5f97c61247d5..95886dcf4a39 100644
--- a/drivers/rtc/rtc-pcf8583.c
+++ b/drivers/rtc/rtc-pcf8583.c
@@ -268,39 +268,29 @@ static int pcf8583_probe(struct i2c_client *client,
                                 const struct i2c_device_id *id)
 {
         struct pcf8583 *pcf8583;
-        int err;
 
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
                 return -ENODEV;
 
-        pcf8583 = kzalloc(sizeof(struct pcf8583), GFP_KERNEL);
+        pcf8583 = devm_kzalloc(&client->dev, sizeof(struct pcf8583),
+                                GFP_KERNEL);
         if (!pcf8583)
                 return -ENOMEM;
 
         i2c_set_clientdata(client, pcf8583);
 
-        pcf8583->rtc = rtc_device_register(pcf8583_driver.driver.name,
-                        &client->dev, &pcf8583_rtc_ops, THIS_MODULE);
+        pcf8583->rtc = devm_rtc_device_register(&client->dev,
+                                pcf8583_driver.driver.name,
+                                &pcf8583_rtc_ops, THIS_MODULE);
 
-        if (IS_ERR(pcf8583->rtc)) {
-                err = PTR_ERR(pcf8583->rtc);
-                goto exit_kfree;
-        }
+        if (IS_ERR(pcf8583->rtc))
+                return PTR_ERR(pcf8583->rtc);
 
         return 0;
-
-exit_kfree:
-        kfree(pcf8583);
-        return err;
 }
 
 static int pcf8583_remove(struct i2c_client *client)
 {
-        struct pcf8583 *pcf8583 = i2c_get_clientdata(client);
-
-        if (pcf8583->rtc)
-                rtc_device_unregister(pcf8583->rtc);
-        kfree(pcf8583);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-ps3.c b/drivers/rtc/rtc-ps3.c
index 968133ce1ee8..4bb825bb5804 100644
--- a/drivers/rtc/rtc-ps3.c
+++ b/drivers/rtc/rtc-ps3.c
@@ -62,7 +62,7 @@ static int __init ps3_rtc_probe(struct platform_device *dev)
 {
         struct rtc_device *rtc;
 
-        rtc = rtc_device_register("rtc-ps3", &dev->dev, &ps3_rtc_ops,
+        rtc = devm_rtc_device_register(&dev->dev, "rtc-ps3", &ps3_rtc_ops,
                                   THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -73,7 +73,6 @@ static int __init ps3_rtc_probe(struct platform_device *dev)
 
 static int __exit ps3_rtc_remove(struct platform_device *dev)
 {
-        rtc_device_unregister(platform_get_drvdata(dev));
         return 0;
 }
 
@@ -85,18 +84,7 @@ static struct platform_driver ps3_rtc_driver = {
         .remove = __exit_p(ps3_rtc_remove),
 };
 
-static int __init ps3_rtc_init(void)
-{
-        return platform_driver_probe(&ps3_rtc_driver, ps3_rtc_probe);
-}
-
-static void __exit ps3_rtc_fini(void)
-{
-        platform_driver_unregister(&ps3_rtc_driver);
-}
-
-module_init(ps3_rtc_init);
-module_exit(ps3_rtc_fini);
+module_platform_driver_probe(ps3_rtc_driver, ps3_rtc_probe);
 
 MODULE_AUTHOR("Sony Corporation");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-puv3.c b/drivers/rtc/rtc-puv3.c
index 0407e13d4de4..72f437170d2e 100644
--- a/drivers/rtc/rtc-puv3.c
+++ b/drivers/rtc/rtc-puv3.c
@@ -207,14 +207,14 @@ static const struct rtc_class_ops puv3_rtcops = {
         .proc           = puv3_rtc_proc,
 };
 
-static void puv3_rtc_enable(struct platform_device *pdev, int en)
+static void puv3_rtc_enable(struct device *dev, int en)
 {
         if (!en) {
                 writel(readl(RTC_RTSR) & ~RTC_RTSR_HZE, RTC_RTSR);
         } else {
                 /* re-enable the device, and check it is ok */
                 if ((readl(RTC_RTSR) & RTC_RTSR_HZE) == 0) {
-                        dev_info(&pdev->dev, "rtc disabled, re-enabling\n");
+                        dev_info(dev, "rtc disabled, re-enabling\n");
                         writel(readl(RTC_RTSR) | RTC_RTSR_HZE, RTC_RTSR);
                 }
         }
@@ -276,7 +276,7 @@ static int puv3_rtc_probe(struct platform_device *pdev)
                 goto err_nores;
         }
 
-        puv3_rtc_enable(pdev, 1);
+        puv3_rtc_enable(&pdev->dev, 1);
 
         /* register RTC and exit */
         rtc = rtc_device_register("pkunity", &pdev->dev, &puv3_rtcops,
@@ -296,44 +296,41 @@ static int puv3_rtc_probe(struct platform_device *pdev)
         return 0;
 
  err_nortc:
-        puv3_rtc_enable(pdev, 0);
+        puv3_rtc_enable(&pdev->dev, 0);
         release_resource(puv3_rtc_mem);
 
  err_nores:
         return ret;
 }
 
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
 static int ticnt_save;
 
-static int puv3_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+static int puv3_rtc_suspend(struct device *dev)
 {
         /* save RTAR for anyone using periodic interrupts */
         ticnt_save = readl(RTC_RTAR);
-        puv3_rtc_enable(pdev, 0);
+        puv3_rtc_enable(dev, 0);
         return 0;
 }
 
-static int puv3_rtc_resume(struct platform_device *pdev)
+static int puv3_rtc_resume(struct device *dev)
 {
-        puv3_rtc_enable(pdev, 1);
+        puv3_rtc_enable(dev, 1);
         writel(ticnt_save, RTC_RTAR);
         return 0;
 }
-#else
-#define puv3_rtc_suspend NULL
-#define puv3_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(puv3_rtc_pm_ops, puv3_rtc_suspend, puv3_rtc_resume);
+
 static struct platform_driver puv3_rtc_driver = {
         .probe          = puv3_rtc_probe,
         .remove         = puv3_rtc_remove,
-        .suspend        = puv3_rtc_suspend,
-        .resume         = puv3_rtc_resume,
         .driver         = {
                 .name   = "PKUnity-v3-RTC",
                 .owner  = THIS_MODULE,
+                .pm     = &puv3_rtc_pm_ops,
         }
 };
 
diff --git a/drivers/rtc/rtc-pxa.c b/drivers/rtc/rtc-pxa.c
index 03c85ee719a7..ed037ae91c5f 100644
--- a/drivers/rtc/rtc-pxa.c
+++ b/drivers/rtc/rtc-pxa.c
@@ -416,7 +416,7 @@ static struct of_device_id pxa_rtc_dt_ids[] = {
 MODULE_DEVICE_TABLE(of, pxa_rtc_dt_ids);
 #endif
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int pxa_rtc_suspend(struct device *dev)
 {
         struct pxa_rtc *pxa_rtc = dev_get_drvdata(dev);
@@ -434,36 +434,20 @@ static int pxa_rtc_resume(struct device *dev)
                 disable_irq_wake(pxa_rtc->irq_Alrm);
         return 0;
 }
-
-static const struct dev_pm_ops pxa_rtc_pm_ops = {
-        .suspend        = pxa_rtc_suspend,
-        .resume         = pxa_rtc_resume,
-};
 #endif
 
+static SIMPLE_DEV_PM_OPS(pxa_rtc_pm_ops, pxa_rtc_suspend, pxa_rtc_resume);
+
 static struct platform_driver pxa_rtc_driver = {
         .remove         = __exit_p(pxa_rtc_remove),
         .driver         = {
                 .name   = "pxa-rtc",
                 .of_match_table = of_match_ptr(pxa_rtc_dt_ids),
-#ifdef CONFIG_PM
                 .pm     = &pxa_rtc_pm_ops,
-#endif
         },
 };
 
-static int __init pxa_rtc_init(void)
-{
-        return platform_driver_probe(&pxa_rtc_driver, pxa_rtc_probe);
-}
-
-static void __exit pxa_rtc_exit(void)
-{
-        platform_driver_unregister(&pxa_rtc_driver);
-}
-
-module_init(pxa_rtc_init);
-module_exit(pxa_rtc_exit);
+module_platform_driver_probe(pxa_rtc_driver, pxa_rtc_probe);
 
 MODULE_AUTHOR("Robert Jarzmik <robert.jarzmik@free.fr>");
 MODULE_DESCRIPTION("PXA27x/PXA3xx Realtime Clock Driver (RTC)");
diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c
index 7726f4a4f2d0..feeedbd82000 100644
--- a/drivers/rtc/rtc-r9701.c
+++ b/drivers/rtc/rtc-r9701.c
@@ -154,21 +154,18 @@ static int r9701_probe(struct spi_device *spi)
                 }
         }
 
-        rtc = rtc_device_register("r9701",
-                                &spi->dev, &r9701_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&spi->dev, "r9701",
+                                &r9701_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
-        dev_set_drvdata(&spi->dev, rtc);
+        spi_set_drvdata(spi, rtc);
 
         return 0;
 }
 
 static int r9701_remove(struct spi_device *spi)
 {
-        struct rtc_device *rtc = dev_get_drvdata(&spi->dev);
-
-        rtc_device_unregister(rtc);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-rc5t583.c b/drivers/rtc/rtc-rc5t583.c
index eb3194d664a8..8eabcf51b35a 100644
--- a/drivers/rtc/rtc-rc5t583.c
+++ b/drivers/rtc/rtc-rc5t583.c
@@ -256,7 +256,7 @@ static int rc5t583_rtc_probe(struct platform_device *pdev)
         }
         device_init_wakeup(&pdev->dev, 1);
 
-        ricoh_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        ricoh_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                 &rc5t583_rtc_ops, THIS_MODULE);
         if (IS_ERR(ricoh_rtc->rtc)) {
                 ret = PTR_ERR(ricoh_rtc->rtc);
@@ -276,13 +276,10 @@ static int rc5t583_rtc_remove(struct platform_device *pdev)
         struct rc5t583_rtc *rc5t583_rtc = dev_get_drvdata(&pdev->dev);
 
         rc5t583_rtc_alarm_irq_enable(&rc5t583_rtc->rtc->dev, 0);
-
-        rtc_device_unregister(rc5t583_rtc->rtc);
         return 0;
 }
 
 #ifdef CONFIG_PM_SLEEP
-
 static int rc5t583_rtc_suspend(struct device *dev)
 {
         struct rc5t583 *rc5t583 = dev_get_drvdata(dev->parent);
@@ -304,24 +301,18 @@ static int rc5t583_rtc_resume(struct device *dev)
         return regmap_write(rc5t583->regmap, RC5T583_RTC_CTL1,
                 rc5t583_rtc->irqen);
 }
-
-static const struct dev_pm_ops rc5t583_rtc_pm_ops = {
-        .suspend        = rc5t583_rtc_suspend,
-        .resume         = rc5t583_rtc_resume,
-};
-
-#define DEV_PM_OPS     (&rc5t583_rtc_pm_ops)
-#else
-#define DEV_PM_OPS     NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(rc5t583_rtc_pm_ops, rc5t583_rtc_suspend,
+                        rc5t583_rtc_resume);
+
 static struct platform_driver rc5t583_rtc_driver = {
         .probe          = rc5t583_rtc_probe,
         .remove         = rc5t583_rtc_remove,
         .driver         = {
                 .owner  = THIS_MODULE,
                 .name   = "rtc-rc5t583",
-                .pm     = DEV_PM_OPS,
+                .pm     = &rc5t583_rtc_pm_ops,
         },
 };
 
diff --git a/drivers/rtc/rtc-rp5c01.c b/drivers/rtc/rtc-rp5c01.c
index 359da6d020b9..873c689f01c3 100644
--- a/drivers/rtc/rtc-rp5c01.c
+++ b/drivers/rtc/rtc-rp5c01.c
@@ -230,15 +230,13 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev)
         if (!res)
                 return -ENODEV;
 
-        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+        priv = devm_kzalloc(&dev->dev, sizeof(*priv), GFP_KERNEL);
         if (!priv)
                 return -ENOMEM;
 
-        priv->regs = ioremap(res->start, resource_size(res));
-        if (!priv->regs) {
-                error = -ENOMEM;
-                goto out_free_priv;
-        }
+        priv->regs = devm_ioremap(&dev->dev, res->start, resource_size(res));
+        if (!priv->regs)
+                return -ENOMEM;
 
         sysfs_bin_attr_init(&priv->nvram_attr);
         priv->nvram_attr.attr.name = "nvram";
@@ -251,27 +249,22 @@ static int __init rp5c01_rtc_probe(struct platform_device *dev)
 
         platform_set_drvdata(dev, priv);
 
-        rtc = rtc_device_register("rtc-rp5c01", &dev->dev, &rp5c01_rtc_ops,
+        rtc = devm_rtc_device_register(&dev->dev, "rtc-rp5c01", &rp5c01_rtc_ops,
                                   THIS_MODULE);
         if (IS_ERR(rtc)) {
                 error = PTR_ERR(rtc);
-                goto out_unmap;
+                goto out;
         }
         priv->rtc = rtc;
 
         error = sysfs_create_bin_file(&dev->dev.kobj, &priv->nvram_attr);
         if (error)
-                goto out_unregister;
+                goto out;
 
         return 0;
 
-out_unregister:
-        rtc_device_unregister(rtc);
-out_unmap:
+out:
         platform_set_drvdata(dev, NULL);
-        iounmap(priv->regs);
-out_free_priv:
-        kfree(priv);
         return error;
 }
 
@@ -280,9 +273,6 @@ static int __exit rp5c01_rtc_remove(struct platform_device *dev)
         struct rp5c01_priv *priv = platform_get_drvdata(dev);
 
         sysfs_remove_bin_file(&dev->dev.kobj, &priv->nvram_attr);
-        rtc_device_unregister(priv->rtc);
-        iounmap(priv->regs);
-        kfree(priv);
         return 0;
 }
 
@@ -294,18 +284,7 @@ static struct platform_driver rp5c01_rtc_driver = {
         .remove = __exit_p(rp5c01_rtc_remove),
 };
 
-static int __init rp5c01_rtc_init(void)
-{
-        return platform_driver_probe(&rp5c01_rtc_driver, rp5c01_rtc_probe);
-}
-
-static void __exit rp5c01_rtc_fini(void)
-{
-        platform_driver_unregister(&rp5c01_rtc_driver);
-}
-
-module_init(rp5c01_rtc_init);
-module_exit(rp5c01_rtc_fini);
+module_platform_driver_probe(rp5c01_rtc_driver, rp5c01_rtc_probe);
 
 MODULE_AUTHOR("Geert Uytterhoeven <geert@linux-m68k.org>");
 MODULE_LICENSE("GPL");
diff --git a/drivers/rtc/rtc-rs5c313.c b/drivers/rtc/rtc-rs5c313.c
index d98ea5b759c8..8089fc63e403 100644
--- a/drivers/rtc/rtc-rs5c313.c
+++ b/drivers/rtc/rtc-rs5c313.c
@@ -367,7 +367,7 @@ static const struct rtc_class_ops rs5c313_rtc_ops = {
 
 static int rs5c313_rtc_probe(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = rtc_device_register("rs5c313", &pdev->dev,
+        struct rtc_device *rtc = devm_rtc_device_register(&pdev->dev, "rs5c313",
                                 &rs5c313_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc))
@@ -380,10 +380,6 @@ static int rs5c313_rtc_probe(struct platform_device *pdev)
 
 static int rs5c313_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = platform_get_drvdata( pdev );
-
-        rtc_device_unregister(rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-rs5c348.c b/drivers/rtc/rtc-rs5c348.c
index 72ef10be8662..2c37df3586c7 100644
--- a/drivers/rtc/rtc-rs5c348.c
+++ b/drivers/rtc/rtc-rs5c348.c
@@ -158,7 +158,8 @@ static int rs5c348_probe(struct spi_device *spi)
         struct rtc_device *rtc;
         struct rs5c348_plat_data *pdata;
 
-        pdata = kzalloc(sizeof(struct rs5c348_plat_data), GFP_KERNEL);
+        pdata = devm_kzalloc(&spi->dev, sizeof(struct rs5c348_plat_data),
+                                GFP_KERNEL);
         if (!pdata)
                 return -ENOMEM;
         spi->dev.platform_data = pdata;
@@ -202,7 +203,7 @@ static int rs5c348_probe(struct spi_device *spi)
         if (ret & RS5C348_BIT_24H)
                 pdata->rtc_24h = 1;
 
-        rtc = rtc_device_register(rs5c348_driver.driver.name, &spi->dev,
+        rtc = devm_rtc_device_register(&spi->dev, rs5c348_driver.driver.name,
                                   &rs5c348_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc)) {
@@ -214,18 +215,11 @@ static int rs5c348_probe(struct spi_device *spi)
 
         return 0;
  kfree_exit:
-        kfree(pdata);
         return ret;
 }
 
 static int rs5c348_remove(struct spi_device *spi)
 {
-        struct rs5c348_plat_data *pdata = spi->dev.platform_data;
-        struct rtc_device *rtc = pdata->rtc;
-
-        if (rtc)
-                rtc_device_unregister(rtc);
-        kfree(pdata);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-rs5c372.c b/drivers/rtc/rtc-rs5c372.c
index 581739f40097..224d634322b4 100644
--- a/drivers/rtc/rtc-rs5c372.c
+++ b/drivers/rtc/rtc-rs5c372.c
@@ -579,7 +579,9 @@ static int rs5c372_probe(struct i2c_client *client,
                 }
         }
 
-        if (!(rs5c372 = kzalloc(sizeof(struct rs5c372), GFP_KERNEL))) {
+        rs5c372 = devm_kzalloc(&client->dev, sizeof(struct rs5c372),
+                                GFP_KERNEL);
+        if (!rs5c372) {
                 err = -ENOMEM;
                 goto exit;
         }
@@ -594,7 +596,7 @@ static int rs5c372_probe(struct i2c_client *client,
 
         err = rs5c_get_regs(rs5c372);
         if (err < 0)
-                goto exit_kfree;
+                goto exit;
 
         /* clock may be set for am/pm or 24 hr time */
         switch (rs5c372->type) {
@@ -617,7 +619,7 @@ static int rs5c372_probe(struct i2c_client *client,
                 break;
         default:
                 dev_err(&client->dev, "unknown RTC type\n");
-                goto exit_kfree;
+                goto exit;
         }
 
         /* if the oscillator lost power and no other software (like
@@ -629,7 +631,7 @@ static int rs5c372_probe(struct i2c_client *client,
         err = rs5c_oscillator_setup(rs5c372);
         if (unlikely(err < 0)) {
                 dev_err(&client->dev, "setup error\n");
-                goto exit_kfree;
+                goto exit;
         }
 
         if (rs5c372_get_datetime(client, &tm) < 0)
@@ -648,38 +650,28 @@ static int rs5c372_probe(struct i2c_client *client,
                         );
 
         /* REVISIT use client->irq to register alarm irq ... */
-
-        rs5c372->rtc = rtc_device_register(rs5c372_driver.driver.name,
-                                &client->dev, &rs5c372_rtc_ops, THIS_MODULE);
+        rs5c372->rtc = devm_rtc_device_register(&client->dev,
+                                        rs5c372_driver.driver.name,
+                                        &rs5c372_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rs5c372->rtc)) {
                 err = PTR_ERR(rs5c372->rtc);
-                goto exit_kfree;
+                goto exit;
         }
 
         err = rs5c_sysfs_register(&client->dev);
         if (err)
-                goto exit_devreg;
+                goto exit;
 
         return 0;
 
-exit_devreg:
-        rtc_device_unregister(rs5c372->rtc);
-
-exit_kfree:
-        kfree(rs5c372);
-
 exit:
         return err;
 }
 
 static int rs5c372_remove(struct i2c_client *client)
 {
-        struct rs5c372 *rs5c372 = i2c_get_clientdata(client);
-
-        rtc_device_unregister(rs5c372->rtc);
         rs5c_sysfs_unregister(&client->dev);
-        kfree(rs5c372);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-rv3029c2.c b/drivers/rtc/rtc-rv3029c2.c
index f8ee8ad7825e..5032c24ec159 100644
--- a/drivers/rtc/rtc-rv3029c2.c
+++ b/drivers/rtc/rtc-rv3029c2.c
@@ -395,9 +395,8 @@ static int rv3029c2_probe(struct i2c_client *client,
         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_EMUL))
                 return -ENODEV;
 
-        rtc = rtc_device_register(client->name,
-                                &client->dev, &rv3029c2_rtc_ops,
-                                THIS_MODULE);
+        rtc = devm_rtc_device_register(&client->dev, client->name,
+                                        &rv3029c2_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -407,23 +406,14 @@ static int rv3029c2_probe(struct i2c_client *client,
         rc = rv3029c2_i2c_get_sr(client, buf);
         if (rc < 0) {
                 dev_err(&client->dev, "reading status failed\n");
-                goto exit_unregister;
+                return rc;
         }
 
         return 0;
-
-exit_unregister:
-        rtc_device_unregister(rtc);
-
-        return rc;
 }
 
 static int rv3029c2_remove(struct i2c_client *client)
 {
-        struct rtc_device *rtc = i2c_get_clientdata(client);
-
-        rtc_device_unregister(rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-rx4581.c b/drivers/rtc/rtc-rx4581.c
index 599ec73ec886..84eb08d65d30 100644
--- a/drivers/rtc/rtc-rx4581.c
+++ b/drivers/rtc/rtc-rx4581.c
@@ -273,20 +273,17 @@ static int rx4581_probe(struct spi_device *spi)
         if (res != 0)
                 return res;
 
-        rtc = rtc_device_register("rx4581",
-                                &spi->dev, &rx4581_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&spi->dev, "rx4581",
+                                &rx4581_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
-        dev_set_drvdata(&spi->dev, rtc);
+        spi_set_drvdata(spi, rtc);
         return 0;
 }
 
 static int rx4581_remove(struct spi_device *spi)
 {
-        struct rtc_device *rtc = dev_get_drvdata(&spi->dev);
-
-        rtc_device_unregister(rtc);
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-rx8581.c b/drivers/rtc/rtc-rx8581.c
index b0c272658fa2..07f3037b18f4 100644
--- a/drivers/rtc/rtc-rx8581.c
+++ b/drivers/rtc/rtc-rx8581.c
@@ -240,8 +240,8 @@ static int rx8581_probe(struct i2c_client *client,
 
         dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
-        rtc = rtc_device_register(rx8581_driver.driver.name,
-                                &client->dev, &rx8581_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&client->dev, rx8581_driver.driver.name,
+                                        &rx8581_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -253,10 +253,6 @@ static int rx8581_probe(struct i2c_client *client,
 
 static int rx8581_remove(struct i2c_client *client)
 {
-        struct rtc_device *rtc = i2c_get_clientdata(client);
-
-        rtc_device_unregister(rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c
index 8a092325188d..f40afdd0e5f5 100644
--- a/drivers/rtc/rtc-s35390a.c
+++ b/drivers/rtc/rtc-s35390a.c
@@ -338,7 +338,8 @@ static int s35390a_probe(struct i2c_client *client,
                 goto exit;
         }
 
-        s35390a = kzalloc(sizeof(struct s35390a), GFP_KERNEL);
+        s35390a = devm_kzalloc(&client->dev, sizeof(struct s35390a),
+                                GFP_KERNEL);
         if (!s35390a) {
                 err = -ENOMEM;
                 goto exit;
@@ -386,8 +387,9 @@ static int s35390a_probe(struct i2c_client *client,
 
         device_set_wakeup_capable(&client->dev, 1);
 
-        s35390a->rtc = rtc_device_register(s35390a_driver.driver.name,
-                                &client->dev, &s35390a_rtc_ops, THIS_MODULE);
+        s35390a->rtc = devm_rtc_device_register(&client->dev,
+                                        s35390a_driver.driver.name,
+                                        &s35390a_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(s35390a->rtc)) {
                 err = PTR_ERR(s35390a->rtc);
@@ -399,7 +401,6 @@ exit_dummy:
         for (i = 1; i < 8; ++i)
                 if (s35390a->client[i])
                         i2c_unregister_device(s35390a->client[i]);
-        kfree(s35390a);
 
 exit:
         return err;
@@ -408,15 +409,12 @@ exit:
 static int s35390a_remove(struct i2c_client *client)
 {
         unsigned int i;
-
         struct s35390a *s35390a = i2c_get_clientdata(client);
+
         for (i = 1; i < 8; ++i)
                 if (s35390a->client[i])
                         i2c_unregister_device(s35390a->client[i]);
 
-        rtc_device_unregister(s35390a->rtc);
-        kfree(s35390a);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index fb994e9ddc15..8e96c00936be 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -51,7 +51,6 @@ static struct clk *rtc_clk;
 static void __iomem *s3c_rtc_base;
 static int s3c_rtc_alarmno = NO_IRQ;
 static int s3c_rtc_tickno  = NO_IRQ;
-static bool wake_en;
 static enum s3c_cpu_type s3c_rtc_cpu_type;
 
 static DEFINE_SPINLOCK(s3c_rtc_pie_lock);
@@ -423,13 +422,11 @@ static void s3c_rtc_enable(struct platform_device *pdev, int en)
 
 static int s3c_rtc_remove(struct platform_device *dev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(dev);
-
         platform_set_drvdata(dev, NULL);
-        rtc_device_unregister(rtc);
 
         s3c_rtc_setaie(&dev->dev, 0);
 
+        clk_unprepare(rtc_clk);
         rtc_clk = NULL;
 
         return 0;
@@ -498,7 +495,7 @@ static int s3c_rtc_probe(struct platform_device *pdev)
                 return ret;
         }
 
-        clk_enable(rtc_clk);
+        clk_prepare_enable(rtc_clk);
 
         /* check to see if everything is setup correctly */
 
@@ -511,7 +508,7 @@ static int s3c_rtc_probe(struct platform_device *pdev)
 
         /* register RTC and exit */
 
-        rtc = rtc_device_register("s3c", &pdev->dev, &s3c_rtcops,
+        rtc = devm_rtc_device_register(&pdev->dev, "s3c", &s3c_rtcops,
                                   THIS_MODULE);
 
         if (IS_ERR(rtc)) {
@@ -574,23 +571,24 @@ static int s3c_rtc_probe(struct platform_device *pdev)
 
  err_alarm_irq:
         platform_set_drvdata(pdev, NULL);
-        rtc_device_unregister(rtc);
 
  err_nortc:
         s3c_rtc_enable(pdev, 0);
-        clk_disable(rtc_clk);
+        clk_disable_unprepare(rtc_clk);
 
         return ret;
 }
 
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
 /* RTC Power management control */
 
 static int ticnt_save, ticnt_en_save;
+static bool wake_en;
 
-static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+static int s3c_rtc_suspend(struct device *dev)
 {
+        struct platform_device *pdev = to_platform_device(dev);
+
         clk_enable(rtc_clk);
         /* save TICNT for anyone using periodic interrupts */
         ticnt_save = readb(s3c_rtc_base + S3C2410_TICNT);
@@ -600,19 +598,20 @@ static int s3c_rtc_suspend(struct platform_device *pdev, pm_message_t state)
         }
         s3c_rtc_enable(pdev, 0);
 
-        if (device_may_wakeup(&pdev->dev) && !wake_en) {
+        if (device_may_wakeup(dev) && !wake_en) {
                 if (enable_irq_wake(s3c_rtc_alarmno) == 0)
                         wake_en = true;
                 else
-                        dev_err(&pdev->dev, "enable_irq_wake failed\n");
+                        dev_err(dev, "enable_irq_wake failed\n");
         }
         clk_disable(rtc_clk);
 
         return 0;
 }
 
-static int s3c_rtc_resume(struct platform_device *pdev)
+static int s3c_rtc_resume(struct device *dev)
 {
+        struct platform_device *pdev = to_platform_device(dev);
         unsigned int tmp;
 
         clk_enable(rtc_clk);
@@ -623,7 +622,7 @@ static int s3c_rtc_resume(struct platform_device *pdev)
                 writew(tmp | ticnt_en_save, s3c_rtc_base + S3C2410_RTCCON);
         }
 
-        if (device_may_wakeup(&pdev->dev) && wake_en) {
+        if (device_may_wakeup(dev) && wake_en) {
                 disable_irq_wake(s3c_rtc_alarmno);
                 wake_en = false;
         }
@@ -631,11 +630,10 @@ static int s3c_rtc_resume(struct platform_device *pdev)
 
         return 0;
 }
-#else
-#define s3c_rtc_suspend NULL
-#define s3c_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(s3c_rtc_pm_ops, s3c_rtc_suspend, s3c_rtc_resume);
+
 #ifdef CONFIG_OF
 static struct s3c_rtc_drv_data s3c_rtc_drv_data_array[] = {
         [TYPE_S3C2410] = { TYPE_S3C2410 },
@@ -685,12 +683,11 @@ MODULE_DEVICE_TABLE(platform, s3c_rtc_driver_ids);
 static struct platform_driver s3c_rtc_driver = {
         .probe          = s3c_rtc_probe,
         .remove         = s3c_rtc_remove,
-        .suspend        = s3c_rtc_suspend,
-        .resume         = s3c_rtc_resume,
         .id_table       = s3c_rtc_driver_ids,
         .driver         = {
                 .name   = "s3c-rtc",
                 .owner  = THIS_MODULE,
+                .pm     = &s3c_rtc_pm_ops,
                 .of_match_table = of_match_ptr(s3c_rtc_dt_match),
         },
 };
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c
index 5ec5036df0bc..00605601dbf7 100644
--- a/drivers/rtc/rtc-sa1100.c
+++ b/drivers/rtc/rtc-sa1100.c
@@ -234,14 +234,13 @@ static int sa1100_rtc_probe(struct platform_device *pdev)
         if (irq_1hz < 0 || irq_alarm < 0)
                 return -ENODEV;
 
-        info = kzalloc(sizeof(struct sa1100_rtc), GFP_KERNEL);
+        info = devm_kzalloc(&pdev->dev, sizeof(struct sa1100_rtc), GFP_KERNEL);
         if (!info)
                 return -ENOMEM;
-        info->clk = clk_get(&pdev->dev, NULL);
+        info->clk = devm_clk_get(&pdev->dev, NULL);
         if (IS_ERR(info->clk)) {
                 dev_err(&pdev->dev, "failed to find rtc clock source\n");
-                ret = PTR_ERR(info->clk);
-                goto err_clk;
+                return PTR_ERR(info->clk);
         }
         info->irq_1hz = irq_1hz;
         info->irq_alarm = irq_alarm;
@@ -268,8 +267,8 @@ static int sa1100_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 1);
 
-        rtc = rtc_device_register(pdev->name, &pdev->dev, &sa1100_rtc_ops,
-                THIS_MODULE);
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name, &sa1100_rtc_ops,
+                                        THIS_MODULE);
 
         if (IS_ERR(rtc)) {
                 ret = PTR_ERR(rtc);
@@ -306,9 +305,6 @@ err_dev:
         clk_disable_unprepare(info->clk);
 err_enable_clk:
         platform_set_drvdata(pdev, NULL);
-        clk_put(info->clk);
-err_clk:
-        kfree(info);
         return ret;
 }
 
@@ -317,17 +313,14 @@ static int sa1100_rtc_remove(struct platform_device *pdev)
         struct sa1100_rtc *info = platform_get_drvdata(pdev);
 
         if (info) {
-                rtc_device_unregister(info->rtc);
                 clk_disable_unprepare(info->clk);
-                clk_put(info->clk);
                 platform_set_drvdata(pdev, NULL);
-                kfree(info);
         }
 
         return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int sa1100_rtc_suspend(struct device *dev)
 {
         struct sa1100_rtc *info = dev_get_drvdata(dev);
@@ -343,13 +336,11 @@ static int sa1100_rtc_resume(struct device *dev)
                 disable_irq_wake(info->irq_alarm);
         return 0;
 }
-
-static const struct dev_pm_ops sa1100_rtc_pm_ops = {
-        .suspend        = sa1100_rtc_suspend,
-        .resume         = sa1100_rtc_resume,
-};
 #endif
 
+static SIMPLE_DEV_PM_OPS(sa1100_rtc_pm_ops, sa1100_rtc_suspend,
+                        sa1100_rtc_resume);
+
 #ifdef CONFIG_OF
 static struct of_device_id sa1100_rtc_dt_ids[] = {
         { .compatible = "mrvl,sa1100-rtc", },
@@ -364,9 +355,7 @@ static struct platform_driver sa1100_rtc_driver = {
         .remove         = sa1100_rtc_remove,
         .driver         = {
                 .name   = "sa1100-rtc",
-#ifdef CONFIG_PM
                 .pm     = &sa1100_rtc_pm_ops,
-#endif
                 .of_match_table = of_match_ptr(sa1100_rtc_dt_ids),
         },
 };
diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index e55a7635ae5f..8d5bd2e36776 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -790,6 +790,7 @@ static void sh_rtc_set_irq_wake(struct device *dev, int enabled)
         }
 }
 
+#ifdef CONFIG_PM_SLEEP
 static int sh_rtc_suspend(struct device *dev)
 {
         if (device_may_wakeup(dev))
@@ -805,33 +806,20 @@ static int sh_rtc_resume(struct device *dev)
 
         return 0;
 }
+#endif
 
-static const struct dev_pm_ops sh_rtc_dev_pm_ops = {
-        .suspend = sh_rtc_suspend,
-        .resume = sh_rtc_resume,
-};
+static SIMPLE_DEV_PM_OPS(sh_rtc_pm_ops, sh_rtc_suspend, sh_rtc_resume);
 
 static struct platform_driver sh_rtc_platform_driver = {
         .driver         = {
                 .name   = DRV_NAME,
                 .owner  = THIS_MODULE,
-                .pm     = &sh_rtc_dev_pm_ops,
+                .pm     = &sh_rtc_pm_ops,
         },
         .remove         = __exit_p(sh_rtc_remove),
 };
 
-static int __init sh_rtc_init(void)
-{
-        return platform_driver_probe(&sh_rtc_platform_driver, sh_rtc_probe);
-}
-
-static void __exit sh_rtc_exit(void)
-{
-        platform_driver_unregister(&sh_rtc_platform_driver);
-}
-
-module_init(sh_rtc_init);
-module_exit(sh_rtc_exit);
+module_platform_driver_probe(sh_rtc_platform_driver, sh_rtc_probe);
 
 MODULE_DESCRIPTION("SuperH on-chip RTC driver");
 MODULE_VERSION(DRV_VERSION);
diff --git a/drivers/rtc/rtc-snvs.c b/drivers/rtc/rtc-snvs.c
index f7d90703db5e..b04f09a1df2a 100644
--- a/drivers/rtc/rtc-snvs.c
+++ b/drivers/rtc/rtc-snvs.c
@@ -283,7 +283,7 @@ static int snvs_rtc_probe(struct platform_device *pdev)
                 return ret;
         }
 
-        data->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        data->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                         &snvs_rtc_ops, THIS_MODULE);
         if (IS_ERR(data->rtc)) {
                 ret = PTR_ERR(data->rtc);
@@ -296,10 +296,6 @@ static int snvs_rtc_probe(struct platform_device *pdev)
 
 static int snvs_rtc_remove(struct platform_device *pdev)
 {
-        struct snvs_rtc_data *data = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(data->rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-spear.c b/drivers/rtc/rtc-spear.c
index a18c3192ed40..574359c48f65 100644
--- a/drivers/rtc/rtc-spear.c
+++ b/drivers/rtc/rtc-spear.c
@@ -400,8 +400,8 @@ static int spear_rtc_probe(struct platform_device *pdev)
         spin_lock_init(&config->lock);
         platform_set_drvdata(pdev, config);
 
-        config->rtc = rtc_device_register(pdev->name, &pdev->dev,
-                        &spear_rtc_ops, THIS_MODULE);
+        config->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+                                        &spear_rtc_ops, THIS_MODULE);
         if (IS_ERR(config->rtc)) {
                 dev_err(&pdev->dev, "can't register RTC device, err %ld\n",
                                 PTR_ERR(config->rtc));
@@ -427,7 +427,6 @@ static int spear_rtc_remove(struct platform_device *pdev)
 {
         struct spear_rtc_config *config = platform_get_drvdata(pdev);
 
-        rtc_device_unregister(config->rtc);
         spear_rtc_disable_interrupt(config);
         clk_disable_unprepare(config->clk);
         device_init_wakeup(&pdev->dev, 0);
@@ -435,10 +434,10 @@ static int spear_rtc_remove(struct platform_device *pdev)
         return 0;
 }
 
-#ifdef CONFIG_PM
-
-static int spear_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int spear_rtc_suspend(struct device *dev)
 {
+        struct platform_device *pdev = to_platform_device(dev);
         struct spear_rtc_config *config = platform_get_drvdata(pdev);
         int irq;
 
@@ -454,8 +453,9 @@ static int spear_rtc_suspend(struct platform_device *pdev, pm_message_t state)
         return 0;
 }
 
-static int spear_rtc_resume(struct platform_device *pdev)
+static int spear_rtc_resume(struct device *dev)
 {
+        struct platform_device *pdev = to_platform_device(dev);
         struct spear_rtc_config *config = platform_get_drvdata(pdev);
         int irq;
 
@@ -473,12 +473,10 @@ static int spear_rtc_resume(struct platform_device *pdev)
 
         return 0;
 }
-
-#else
-#define spear_rtc_suspend       NULL
-#define spear_rtc_resume        NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(spear_rtc_pm_ops, spear_rtc_suspend, spear_rtc_resume);
+
 static void spear_rtc_shutdown(struct platform_device *pdev)
 {
         struct spear_rtc_config *config = platform_get_drvdata(pdev);
@@ -498,11 +496,10 @@ MODULE_DEVICE_TABLE(of, spear_rtc_id_table);
 static struct platform_driver spear_rtc_driver = {
         .probe = spear_rtc_probe,
         .remove = spear_rtc_remove,
-        .suspend = spear_rtc_suspend,
-        .resume = spear_rtc_resume,
         .shutdown = spear_rtc_shutdown,
         .driver = {
                 .name = "rtc-spear",
+                .pm = &spear_rtc_pm_ops,
                 .of_match_table = of_match_ptr(spear_rtc_id_table),
         },
 };
diff --git a/drivers/rtc/rtc-starfire.c b/drivers/rtc/rtc-starfire.c
index 5be98bfd7ed3..987b5ec0ae56 100644
--- a/drivers/rtc/rtc-starfire.c
+++ b/drivers/rtc/rtc-starfire.c
@@ -39,8 +39,10 @@ static const struct rtc_class_ops starfire_rtc_ops = {
 
 static int __init starfire_rtc_probe(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = rtc_device_register("starfire", &pdev->dev,
-                                     &starfire_rtc_ops, THIS_MODULE);
+        struct rtc_device *rtc;
+
+        rtc = devm_rtc_device_register(&pdev->dev, "starfire",
+                                &starfire_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
@@ -51,10 +53,6 @@ static int __init starfire_rtc_probe(struct platform_device *pdev)
 
 static int __exit starfire_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtc);
-
         return 0;
 }
 
@@ -66,15 +64,4 @@ static struct platform_driver starfire_rtc_driver = {
         .remove         = __exit_p(starfire_rtc_remove),
 };
 
-static int __init starfire_rtc_init(void)
-{
-        return platform_driver_probe(&starfire_rtc_driver, starfire_rtc_probe);
-}
-
-static void __exit starfire_rtc_exit(void)
-{
-        platform_driver_unregister(&starfire_rtc_driver);
-}
-
-module_init(starfire_rtc_init);
-module_exit(starfire_rtc_exit);
+module_platform_driver_probe(starfire_rtc_driver, starfire_rtc_probe);
diff --git a/drivers/rtc/rtc-stk17ta8.c b/drivers/rtc/rtc-stk17ta8.c
index 7e4a6f65cb91..af5e97e3f272 100644
--- a/drivers/rtc/rtc-stk17ta8.c
+++ b/drivers/rtc/rtc-stk17ta8.c
@@ -336,14 +336,13 @@ static int stk17ta8_rtc_probe(struct platform_device *pdev)
                 }
         }
 
-        pdata->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                   &stk17ta8_rtc_ops, THIS_MODULE);
         if (IS_ERR(pdata->rtc))
                 return PTR_ERR(pdata->rtc);
 
         ret = sysfs_create_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr);
-        if (ret)
-                rtc_device_unregister(pdata->rtc);
+
         return ret;
 }
 
@@ -352,7 +351,6 @@ static int stk17ta8_rtc_remove(struct platform_device *pdev)
         struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
         sysfs_remove_bin_file(&pdev->dev.kobj, &stk17ta8_nvram_attr);
-        rtc_device_unregister(pdata->rtc);
         if (pdata->irq > 0)
                 writeb(0, pdata->ioaddr + RTC_INTERRUPTS);
         return 0;
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index 98f0d3c30738..a9cd26a26dc0 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -227,11 +227,7 @@ static int stmp3xxx_rtc_remove(struct platform_device *pdev)
 
         writel(STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
                         rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
-        free_irq(rtc_data->irq_alarm, &pdev->dev);
-        rtc_device_unregister(rtc_data->rtc);
         platform_set_drvdata(pdev, NULL);
-        iounmap(rtc_data->io);
-        kfree(rtc_data);
 
         return 0;
 }
@@ -242,22 +238,20 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
         struct resource *r;
         int err;
 
-        rtc_data = kzalloc(sizeof *rtc_data, GFP_KERNEL);
+        rtc_data = devm_kzalloc(&pdev->dev, sizeof(*rtc_data), GFP_KERNEL);
         if (!rtc_data)
                 return -ENOMEM;
 
         r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!r) {
                 dev_err(&pdev->dev, "failed to get resource\n");
-                err = -ENXIO;
-                goto out_free;
+                return -ENXIO;
         }
 
-        rtc_data->io = ioremap(r->start, resource_size(r));
+        rtc_data->io = devm_ioremap(&pdev->dev, r->start, resource_size(r));
         if (!rtc_data->io) {
                 dev_err(&pdev->dev, "ioremap failed\n");
-                err = -EIO;
-                goto out_free;
+                return -EIO;
         }
 
         rtc_data->irq_alarm = platform_get_irq(pdev, 0);
@@ -265,8 +259,7 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
         if (!(readl(STMP3XXX_RTC_STAT + rtc_data->io) &
                         STMP3XXX_RTC_STAT_RTC_PRESENT)) {
                 dev_err(&pdev->dev, "no device onboard\n");
-                err = -ENODEV;
-                goto out_remap;
+                return -ENODEV;
         }
 
         platform_set_drvdata(pdev, rtc_data);
@@ -281,43 +274,38 @@ static int stmp3xxx_rtc_probe(struct platform_device *pdev)
                         STMP3XXX_RTC_CTRL_ALARM_IRQ_EN,
                         rtc_data->io + STMP3XXX_RTC_CTRL_CLR);
 
-        rtc_data->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc_data->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                 &stmp3xxx_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc_data->rtc)) {
                 err = PTR_ERR(rtc_data->rtc);
-                goto out_remap;
+                goto out;
         }
 
-        err = request_irq(rtc_data->irq_alarm, stmp3xxx_rtc_interrupt, 0,
-                        "RTC alarm", &pdev->dev);
+        err = devm_request_irq(&pdev->dev, rtc_data->irq_alarm,
+                        stmp3xxx_rtc_interrupt, 0, "RTC alarm", &pdev->dev);
         if (err) {
                 dev_err(&pdev->dev, "Cannot claim IRQ%d\n",
                         rtc_data->irq_alarm);
-                goto out_irq_alarm;
+                goto out;
         }
 
         stmp3xxx_wdt_register(pdev);
         return 0;
 
-out_irq_alarm:
-        rtc_device_unregister(rtc_data->rtc);
-out_remap:
+out:
         platform_set_drvdata(pdev, NULL);
-        iounmap(rtc_data->io);
-out_free:
-        kfree(rtc_data);
         return err;
 }
 
-#ifdef CONFIG_PM
-static int stmp3xxx_rtc_suspend(struct platform_device *dev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int stmp3xxx_rtc_suspend(struct device *dev)
 {
         return 0;
 }
 
-static int stmp3xxx_rtc_resume(struct platform_device *dev)
+static int stmp3xxx_rtc_resume(struct device *dev)
 {
-        struct stmp3xxx_rtc_data *rtc_data = platform_get_drvdata(dev);
+        struct stmp3xxx_rtc_data *rtc_data = dev_get_drvdata(dev);
 
         mxs_reset_block(rtc_data->io);
         writel(STMP3XXX_RTC_PERSISTENT0_ALARM_EN |
@@ -326,11 +314,11 @@ static int stmp3xxx_rtc_resume(struct platform_device *dev)
                         rtc_data->io + STMP3XXX_RTC_PERSISTENT0_CLR);
         return 0;
 }
-#else
-#define stmp3xxx_rtc_suspend    NULL
-#define stmp3xxx_rtc_resume     NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(stmp3xxx_rtc_pm_ops, stmp3xxx_rtc_suspend,
+                        stmp3xxx_rtc_resume);
+
 static const struct of_device_id rtc_dt_ids[] = {
         { .compatible = "fsl,stmp3xxx-rtc", },
         { /* sentinel */ }
@@ -340,11 +328,10 @@ MODULE_DEVICE_TABLE(of, rtc_dt_ids);
 static struct platform_driver stmp3xxx_rtcdrv = {
         .probe          = stmp3xxx_rtc_probe,
         .remove         = stmp3xxx_rtc_remove,
-        .suspend        = stmp3xxx_rtc_suspend,
-        .resume         = stmp3xxx_rtc_resume,
         .driver         = {
                 .name   = "stmp3xxx-rtc",
                 .owner  = THIS_MODULE,
+                .pm     = &stmp3xxx_rtc_pm_ops,
                 .of_match_table = of_match_ptr(rtc_dt_ids),
         },
 };
diff --git a/drivers/rtc/rtc-sun4v.c b/drivers/rtc/rtc-sun4v.c
index 59b5c2dcb58c..ce42e5fa9e09 100644
--- a/drivers/rtc/rtc-sun4v.c
+++ b/drivers/rtc/rtc-sun4v.c
@@ -81,8 +81,10 @@ static const struct rtc_class_ops sun4v_rtc_ops = {
 
 static int __init sun4v_rtc_probe(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = rtc_device_register("sun4v", &pdev->dev,
-                                     &sun4v_rtc_ops, THIS_MODULE);
+        struct rtc_device *rtc;
+
+        rtc = devm_rtc_device_register(&pdev->dev, "sun4v",
+                                &sun4v_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
 
@@ -92,9 +94,6 @@ static int __init sun4v_rtc_probe(struct platform_device *pdev)
 
 static int __exit sun4v_rtc_remove(struct platform_device *pdev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtc);
         return 0;
 }
 
@@ -106,18 +105,7 @@ static struct platform_driver sun4v_rtc_driver = {
         .remove         = __exit_p(sun4v_rtc_remove),
 };
 
-static int __init sun4v_rtc_init(void)
-{
-        return platform_driver_probe(&sun4v_rtc_driver, sun4v_rtc_probe);
-}
-
-static void __exit sun4v_rtc_exit(void)
-{
-        platform_driver_unregister(&sun4v_rtc_driver);
-}
-
-module_init(sun4v_rtc_init);
-module_exit(sun4v_rtc_exit);
+module_platform_driver_probe(sun4v_rtc_driver, sun4v_rtc_probe);
 
 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
 MODULE_DESCRIPTION("SUN4V RTC driver");
diff --git a/drivers/rtc/rtc-tegra.c b/drivers/rtc/rtc-tegra.c
index 7c033756d6b5..a34315d25478 100644
--- a/drivers/rtc/rtc-tegra.c
+++ b/drivers/rtc/rtc-tegra.c
@@ -26,6 +26,7 @@
 #include <linux/delay.h>
 #include <linux/rtc.h>
 #include <linux/platform_device.h>
+#include <linux/pm.h>
 
 /* set to 1 = busy every eight 32kHz clocks during copy of sec+msec to AHB */
 #define TEGRA_RTC_REG_BUSY                      0x004
@@ -309,7 +310,7 @@ static const struct of_device_id tegra_rtc_dt_match[] = {
 };
 MODULE_DEVICE_TABLE(of, tegra_rtc_dt_match);
 
-static int tegra_rtc_probe(struct platform_device *pdev)
+static int __init tegra_rtc_probe(struct platform_device *pdev)
 {
         struct tegra_rtc_info *info;
         struct resource *res;
@@ -348,53 +349,35 @@ static int tegra_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 1);
 
-        info->rtc_dev = rtc_device_register(
-                pdev->name, &pdev->dev, &tegra_rtc_ops, THIS_MODULE);
+        info->rtc_dev = devm_rtc_device_register(&pdev->dev,
+                                dev_name(&pdev->dev), &tegra_rtc_ops,
+                                THIS_MODULE);
         if (IS_ERR(info->rtc_dev)) {
                 ret = PTR_ERR(info->rtc_dev);
-                info->rtc_dev = NULL;
-                dev_err(&pdev->dev,
-                        "Unable to register device (err=%d).\n",
+                dev_err(&pdev->dev, "Unable to register device (err=%d).\n",
                         ret);
                 return ret;
         }
 
         ret = devm_request_irq(&pdev->dev, info->tegra_rtc_irq,
                         tegra_rtc_irq_handler, IRQF_TRIGGER_HIGH,
-                        "rtc alarm", &pdev->dev);
+                        dev_name(&pdev->dev), &pdev->dev);
         if (ret) {
                 dev_err(&pdev->dev,
                         "Unable to request interrupt for device (err=%d).\n",
                         ret);
-                goto err_dev_unreg;
+                return ret;
         }
 
         dev_notice(&pdev->dev, "Tegra internal Real Time Clock\n");
 
         return 0;
-
-err_dev_unreg:
-        rtc_device_unregister(info->rtc_dev);
-
-        return ret;
 }
 
-static int tegra_rtc_remove(struct platform_device *pdev)
+#ifdef CONFIG_PM_SLEEP
+static int tegra_rtc_suspend(struct device *dev)
 {
-        struct tegra_rtc_info *info = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(info->rtc_dev);
-
-        platform_set_drvdata(pdev, NULL);
-
-        return 0;
-}
-
-#ifdef CONFIG_PM
-static int tegra_rtc_suspend(struct platform_device *pdev, pm_message_t state)
-{
-        struct device *dev = &pdev->dev;
-        struct tegra_rtc_info *info = platform_get_drvdata(pdev);
+        struct tegra_rtc_info *info = dev_get_drvdata(dev);
 
         tegra_rtc_wait_while_busy(dev);
 
@@ -416,10 +399,9 @@ static int tegra_rtc_suspend(struct platform_device *pdev, pm_message_t state)
         return 0;
 }
 
-static int tegra_rtc_resume(struct platform_device *pdev)
+static int tegra_rtc_resume(struct device *dev)
 {
-        struct device *dev = &pdev->dev;
-        struct tegra_rtc_info *info = platform_get_drvdata(pdev);
+        struct tegra_rtc_info *info = dev_get_drvdata(dev);
 
         dev_vdbg(dev, "Resume (device_may_wakeup=%d)\n",
                 device_may_wakeup(dev));
@@ -431,6 +413,8 @@ static int tegra_rtc_resume(struct platform_device *pdev)
 }
 #endif
 
+static SIMPLE_DEV_PM_OPS(tegra_rtc_pm_ops, tegra_rtc_suspend, tegra_rtc_resume);
+
 static void tegra_rtc_shutdown(struct platform_device *pdev)
 {
         dev_vdbg(&pdev->dev, "disabling interrupts.\n");
@@ -439,30 +423,16 @@ static void tegra_rtc_shutdown(struct platform_device *pdev)
 
 MODULE_ALIAS("platform:tegra_rtc");
 static struct platform_driver tegra_rtc_driver = {
-        .remove         = tegra_rtc_remove,
         .shutdown       = tegra_rtc_shutdown,
         .driver         = {
                 .name   = "tegra_rtc",
                 .owner  = THIS_MODULE,
                 .of_match_table = tegra_rtc_dt_match,
+                .pm     = &tegra_rtc_pm_ops,
         },
-#ifdef CONFIG_PM
-        .suspend        = tegra_rtc_suspend,
-        .resume         = tegra_rtc_resume,
-#endif
 };
 
-static int __init tegra_rtc_init(void)
-{
-        return platform_driver_probe(&tegra_rtc_driver, tegra_rtc_probe);
-}
-module_init(tegra_rtc_init);
-
-static void __exit tegra_rtc_exit(void)
-{
-        platform_driver_unregister(&tegra_rtc_driver);
-}
-module_exit(tegra_rtc_exit);
+module_platform_driver_probe(tegra_rtc_driver, tegra_rtc_probe);
 
 MODULE_AUTHOR("Jon Mayo <jmayo@nvidia.com>");
 MODULE_DESCRIPTION("driver for Tegra internal RTC");
diff --git a/drivers/rtc/rtc-test.c b/drivers/rtc/rtc-test.c
index b92e0f6383e6..7746e65b93f2 100644
--- a/drivers/rtc/rtc-test.c
+++ b/drivers/rtc/rtc-test.c
@@ -99,8 +99,10 @@ static DEVICE_ATTR(irq, S_IRUGO | S_IWUSR, test_irq_show, test_irq_store);
 static int test_probe(struct platform_device *plat_dev)
 {
         int err;
-        struct rtc_device *rtc = rtc_device_register("test", &plat_dev->dev,
-                                                &test_rtc_ops, THIS_MODULE);
+        struct rtc_device *rtc;
+
+        rtc = devm_rtc_device_register(&plat_dev->dev, "test",
+                                &test_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc)) {
                 err = PTR_ERR(rtc);
                 return err;
@@ -115,15 +117,11 @@ static int test_probe(struct platform_device *plat_dev)
         return 0;
 
 err:
-        rtc_device_unregister(rtc);
         return err;
 }
 
 static int test_remove(struct platform_device *plat_dev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(plat_dev);
-
-        rtc_device_unregister(rtc);
         device_remove_file(&plat_dev->dev, &dev_attr_irq);
 
         return 0;
diff --git a/drivers/rtc/rtc-tile.c b/drivers/rtc/rtc-tile.c
index 62db4841078b..249b6531f119 100644
--- a/drivers/rtc/rtc-tile.c
+++ b/drivers/rtc/rtc-tile.c
@@ -80,8 +80,8 @@ static int tile_rtc_probe(struct platform_device *dev)
 {
         struct rtc_device *rtc;
 
-        rtc = rtc_device_register("tile",
-                                  &dev->dev, &tile_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&dev->dev, "tile",
+                                &tile_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -96,11 +96,6 @@ static int tile_rtc_probe(struct platform_device *dev)
  */
 static int tile_rtc_remove(struct platform_device *dev)
 {
-        struct rtc_device *rtc = platform_get_drvdata(dev);
-
-        if (rtc)
-                rtc_device_unregister(rtc);
-
         platform_set_drvdata(dev, NULL);
 
         return 0;
diff --git a/drivers/rtc/rtc-tps6586x.c b/drivers/rtc/rtc-tps6586x.c
index aab4e8c93622..459c2ffc95a6 100644
--- a/drivers/rtc/rtc-tps6586x.c
+++ b/drivers/rtc/rtc-tps6586x.c
@@ -274,7 +274,7 @@ static int tps6586x_rtc_probe(struct platform_device *pdev)
         }
 
         platform_set_drvdata(pdev, rtc);
-        rtc->rtc = rtc_device_register(dev_name(&pdev->dev), &pdev->dev,
+        rtc->rtc = devm_rtc_device_register(&pdev->dev, dev_name(&pdev->dev),
                                        &tps6586x_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtc)) {
                 ret = PTR_ERR(rtc->rtc);
@@ -289,15 +289,12 @@ static int tps6586x_rtc_probe(struct platform_device *pdev)
         if (ret < 0) {
                 dev_err(&pdev->dev, "request IRQ(%d) failed with ret %d\n",
                                 rtc->irq, ret);
-                goto fail_req_irq;
+                goto fail_rtc_register;
         }
         disable_irq(rtc->irq);
         device_set_wakeup_capable(&pdev->dev, 1);
         return 0;
 
-fail_req_irq:
-        rtc_device_unregister(rtc->rtc);
-
 fail_rtc_register:
         tps6586x_update(tps_dev, RTC_CTRL, 0,
                 RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK);
@@ -306,12 +303,10 @@ fail_rtc_register:
 
 static int tps6586x_rtc_remove(struct platform_device *pdev)
 {
-        struct tps6586x_rtc *rtc = platform_get_drvdata(pdev);
         struct device *tps_dev = to_tps6586x_dev(&pdev->dev);
 
         tps6586x_update(tps_dev, RTC_CTRL, 0,
                 RTC_ENABLE | OSC_SRC_SEL | PRE_BYPASS | CL_SEL_MASK);
-        rtc_device_unregister(rtc->rtc);
         return 0;
 }
 
@@ -335,9 +330,8 @@ static int tps6586x_rtc_resume(struct device *dev)
 }
 #endif
 
-static const struct dev_pm_ops tps6586x_pm_ops = {
-        SET_SYSTEM_SLEEP_PM_OPS(tps6586x_rtc_suspend, tps6586x_rtc_resume)
-};
+static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_rtc_suspend,
+                        tps6586x_rtc_resume);
 
 static struct platform_driver tps6586x_rtc_driver = {
         .driver = {
diff --git a/drivers/rtc/rtc-tps65910.c b/drivers/rtc/rtc-tps65910.c
index 8bd8115329b5..a9caf043b0ce 100644
--- a/drivers/rtc/rtc-tps65910.c
+++ b/drivers/rtc/rtc-tps65910.c
@@ -263,7 +263,7 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
         if (irq <= 0) {
                 dev_warn(&pdev->dev, "Wake up is not possible as irq = %d\n",
                         irq);
-                return ret;
+                return -ENXIO;
         }
 
         ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
@@ -276,7 +276,7 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
         tps_rtc->irq = irq;
         device_set_wakeup_capable(&pdev->dev, 1);
 
-        tps_rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        tps_rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                 &tps65910_rtc_ops, THIS_MODULE);
         if (IS_ERR(tps_rtc->rtc)) {
                 ret = PTR_ERR(tps_rtc->rtc);
@@ -295,12 +295,8 @@ static int tps65910_rtc_probe(struct platform_device *pdev)
  */
 static int tps65910_rtc_remove(struct platform_device *pdev)
 {
-        /* leave rtc running, but disable irqs */
-        struct tps65910_rtc *tps_rtc = platform_get_drvdata(pdev);
-
         tps65910_rtc_alarm_irq_enable(&pdev->dev, 0);
 
-        rtc_device_unregister(tps_rtc->rtc);
         return 0;
 }
 
@@ -324,9 +320,8 @@ static int tps65910_rtc_resume(struct device *dev)
 }
 #endif
 
-static const struct dev_pm_ops tps65910_rtc_pm_ops = {
-        SET_SYSTEM_SLEEP_PM_OPS(tps65910_rtc_suspend, tps65910_rtc_resume)
-};
+static SIMPLE_DEV_PM_OPS(tps65910_rtc_pm_ops, tps65910_rtc_suspend,
+                        tps65910_rtc_resume);
 
 static struct platform_driver tps65910_rtc_driver = {
         .probe          = tps65910_rtc_probe,
diff --git a/drivers/rtc/rtc-tps80031.c b/drivers/rtc/rtc-tps80031.c
index 9aaf8aaebae9..72662eafb938 100644
--- a/drivers/rtc/rtc-tps80031.c
+++ b/drivers/rtc/rtc-tps80031.c
@@ -277,7 +277,7 @@ static int tps80031_rtc_probe(struct platform_device *pdev)
                 return ret;
         }
 
-        rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                &tps80031_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc->rtc)) {
                 ret = PTR_ERR(rtc->rtc);
@@ -292,7 +292,6 @@ static int tps80031_rtc_probe(struct platform_device *pdev)
         if (ret < 0) {
                 dev_err(&pdev->dev, "request IRQ:%d failed, err = %d\n",
                          rtc->irq, ret);
-                rtc_device_unregister(rtc->rtc);
                 return ret;
         }
         device_set_wakeup_capable(&pdev->dev, 1);
@@ -301,9 +300,6 @@ static int tps80031_rtc_probe(struct platform_device *pdev)
 
 static int tps80031_rtc_remove(struct platform_device *pdev)
 {
-        struct tps80031_rtc *rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(rtc->rtc);
         return 0;
 }
 
@@ -327,9 +323,8 @@ static int tps80031_rtc_resume(struct device *dev)
 };
 #endif
 
-static const struct dev_pm_ops tps80031_pm_ops = {
-        SET_SYSTEM_SLEEP_PM_OPS(tps80031_rtc_suspend, tps80031_rtc_resume)
-};
+static SIMPLE_DEV_PM_OPS(tps80031_pm_ops, tps80031_rtc_suspend,
+                        tps80031_rtc_resume);
 
 static struct platform_driver tps80031_rtc_driver = {
         .driver = {
diff --git a/drivers/rtc/rtc-twl.c b/drivers/rtc/rtc-twl.c
index 8bc6c80b184c..8751a5240c99 100644
--- a/drivers/rtc/rtc-twl.c
+++ b/drivers/rtc/rtc-twl.c
@@ -566,11 +566,10 @@ static void twl_rtc_shutdown(struct platform_device *pdev)
         mask_rtc_irq_bit(BIT_RTC_INTERRUPTS_REG_IT_TIMER_M);
 }
 
-#ifdef CONFIG_PM
-
+#ifdef CONFIG_PM_SLEEP
 static unsigned char irqstat;
 
-static int twl_rtc_suspend(struct platform_device *pdev, pm_message_t state)
+static int twl_rtc_suspend(struct device *dev)
 {
         irqstat = rtc_irq_bits;
 
@@ -578,17 +577,15 @@ static int twl_rtc_suspend(struct platform_device *pdev, pm_message_t state)
         return 0;
 }
 
-static int twl_rtc_resume(struct platform_device *pdev)
+static int twl_rtc_resume(struct device *dev)
 {
         set_rtc_irq_bit(irqstat);
         return 0;
 }
-
-#else
-#define twl_rtc_suspend NULL
-#define twl_rtc_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(twl_rtc_pm_ops, twl_rtc_suspend, twl_rtc_resume);
+
 #ifdef CONFIG_OF
 static const struct of_device_id twl_rtc_of_match[] = {
         {.compatible = "ti,twl4030-rtc", },
@@ -603,11 +600,10 @@ static struct platform_driver twl4030rtc_driver = {
         .probe          = twl_rtc_probe,
         .remove         = twl_rtc_remove,
         .shutdown       = twl_rtc_shutdown,
-        .suspend        = twl_rtc_suspend,
-        .resume         = twl_rtc_resume,
         .driver         = {
                 .owner          = THIS_MODULE,
                 .name           = "twl_rtc",
+                .pm             = &twl_rtc_pm_ops,
                 .of_match_table = of_match_ptr(twl_rtc_of_match),
         },
 };
diff --git a/drivers/rtc/rtc-tx4939.c b/drivers/rtc/rtc-tx4939.c
index a12bfac49d36..f9a0677e4e3b 100644
--- a/drivers/rtc/rtc-tx4939.c
+++ b/drivers/rtc/rtc-tx4939.c
@@ -268,14 +268,13 @@ static int __init tx4939_rtc_probe(struct platform_device *pdev)
         if (devm_request_irq(&pdev->dev, irq, tx4939_rtc_interrupt,
                              0, pdev->name, &pdev->dev) < 0)
                 return -EBUSY;
-        rtc = rtc_device_register(pdev->name, &pdev->dev,
+        rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                                   &tx4939_rtc_ops, THIS_MODULE);
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
         pdata->rtc = rtc;
         ret = sysfs_create_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr);
-        if (ret)
-                rtc_device_unregister(rtc);
+
         return ret;
 }
 
@@ -284,7 +283,6 @@ static int __exit tx4939_rtc_remove(struct platform_device *pdev)
         struct tx4939rtc_plat_data *pdata = platform_get_drvdata(pdev);
 
         sysfs_remove_bin_file(&pdev->dev.kobj, &tx4939_rtc_nvram_attr);
-        rtc_device_unregister(pdata->rtc);
         spin_lock_irq(&pdata->lock);
         tx4939_rtc_cmd(pdata->rtcreg, TX4939_RTCCTL_COMMAND_NOP);
         spin_unlock_irq(&pdata->lock);
@@ -299,18 +297,7 @@ static struct platform_driver tx4939_rtc_driver = {
         },
 };
 
-static int __init tx4939rtc_init(void)
-{
-        return platform_driver_probe(&tx4939_rtc_driver, tx4939_rtc_probe);
-}
-
-static void __exit tx4939rtc_exit(void)
-{
-        platform_driver_unregister(&tx4939_rtc_driver);
-}
-
-module_init(tx4939rtc_init);
-module_exit(tx4939rtc_exit);
+module_platform_driver_probe(tx4939_rtc_driver, tx4939_rtc_probe);
 
 MODULE_AUTHOR("Atsushi Nemoto <anemo@mba.ocn.ne.jp>");
 MODULE_DESCRIPTION("TX4939 internal RTC driver");
diff --git a/drivers/rtc/rtc-v3020.c b/drivers/rtc/rtc-v3020.c
index bca5d677bc85..6e0cba8f47d5 100644
--- a/drivers/rtc/rtc-v3020.c
+++ b/drivers/rtc/rtc-v3020.c
@@ -309,7 +309,7 @@ static int rtc_probe(struct platform_device *pdev)
         int i;
         int temp;
 
-        chip = kzalloc(sizeof *chip, GFP_KERNEL);
+        chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
         if (!chip)
                 return -ENOMEM;
 
@@ -353,8 +353,8 @@ static int rtc_probe(struct platform_device *pdev)
 
         platform_set_drvdata(pdev, chip);
 
-        chip->rtc = rtc_device_register("v3020",
-                                &pdev->dev, &v3020_rtc_ops, THIS_MODULE);
+        chip->rtc = devm_rtc_device_register(&pdev->dev, "v3020",
+                                        &v3020_rtc_ops, THIS_MODULE);
         if (IS_ERR(chip->rtc)) {
                 retval = PTR_ERR(chip->rtc);
                 goto err_io;
@@ -365,21 +365,14 @@ static int rtc_probe(struct platform_device *pdev)
 err_io:
         chip->ops->unmap_io(chip);
 err_chip:
-        kfree(chip);
-
         return retval;
 }
 
 static int rtc_remove(struct platform_device *dev)
 {
         struct v3020 *chip = platform_get_drvdata(dev);
-        struct rtc_device *rtc = chip->rtc;
-
-        if (rtc)
-                rtc_device_unregister(rtc);
 
         chip->ops->unmap_io(chip);
-        kfree(chip);
 
         return 0;
 }
diff --git a/drivers/rtc/rtc-vt8500.c b/drivers/rtc/rtc-vt8500.c
index a000bc0a8bff..d89efee6d29e 100644
--- a/drivers/rtc/rtc-vt8500.c
+++ b/drivers/rtc/rtc-vt8500.c
@@ -252,7 +252,7 @@ static int vt8500_rtc_probe(struct platform_device *pdev)
         writel(VT8500_RTC_CR_ENABLE,
                vt8500_rtc->regbase + VT8500_RTC_CR);
 
-        vt8500_rtc->rtc = rtc_device_register("vt8500-rtc", &pdev->dev,
+        vt8500_rtc->rtc = devm_rtc_device_register(&pdev->dev, "vt8500-rtc",
                                               &vt8500_rtc_ops, THIS_MODULE);
         if (IS_ERR(vt8500_rtc->rtc)) {
                 ret = PTR_ERR(vt8500_rtc->rtc);
@@ -266,13 +266,11 @@ static int vt8500_rtc_probe(struct platform_device *pdev)
         if (ret < 0) {
                 dev_err(&pdev->dev, "can't get irq %i, err %d\n",
                         vt8500_rtc->irq_alarm, ret);
-                goto err_unreg;
+                goto err_return;
         }
 
         return 0;
 
-err_unreg:
-        rtc_device_unregister(vt8500_rtc->rtc);
 err_return:
         return ret;
 }
@@ -281,8 +279,6 @@ static int vt8500_rtc_remove(struct platform_device *pdev)
 {
         struct vt8500_rtc *vt8500_rtc = platform_get_drvdata(pdev);
 
-        rtc_device_unregister(vt8500_rtc->rtc);
-
         /* Disable alarm matching */
         writel(0, vt8500_rtc->regbase + VT8500_RTC_IS);
 
diff --git a/drivers/rtc/rtc-wm831x.c b/drivers/rtc/rtc-wm831x.c
index 2f0ac7b30a0c..8d65b94e5a7e 100644
--- a/drivers/rtc/rtc-wm831x.c
+++ b/drivers/rtc/rtc-wm831x.c
@@ -436,7 +436,7 @@ static int wm831x_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 1);
 
-        wm831x_rtc->rtc = rtc_device_register("wm831x", &pdev->dev,
+        wm831x_rtc->rtc = devm_rtc_device_register(&pdev->dev, "wm831x",
                                               &wm831x_rtc_ops, THIS_MODULE);
         if (IS_ERR(wm831x_rtc->rtc)) {
                 ret = PTR_ERR(wm831x_rtc->rtc);
@@ -462,10 +462,6 @@ err:
 
 static int wm831x_rtc_remove(struct platform_device *pdev)
 {
-        struct wm831x_rtc *wm831x_rtc = platform_get_drvdata(pdev);
-
-        rtc_device_unregister(wm831x_rtc->rtc);
-
         return 0;
 }
 
diff --git a/drivers/rtc/rtc-wm8350.c b/drivers/rtc/rtc-wm8350.c
index 8ad86ae0d30f..fa247deb9cf4 100644
--- a/drivers/rtc/rtc-wm8350.c
+++ b/drivers/rtc/rtc-wm8350.c
@@ -339,7 +339,7 @@ static const struct rtc_class_ops wm8350_rtc_ops = {
         .alarm_irq_enable = wm8350_rtc_alarm_irq_enable,
 };
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int wm8350_rtc_suspend(struct device *dev)
 {
         struct platform_device *pdev = to_platform_device(dev);
@@ -375,10 +375,6 @@ static int wm8350_rtc_resume(struct device *dev)
 
         return 0;
 }
-
-#else
-#define wm8350_rtc_suspend NULL
-#define wm8350_rtc_resume NULL
 #endif
 
 static int wm8350_rtc_probe(struct platform_device *pdev)
@@ -439,8 +435,8 @@ static int wm8350_rtc_probe(struct platform_device *pdev)
 
         device_init_wakeup(&pdev->dev, 1);
 
-        wm_rtc->rtc = rtc_device_register("wm8350", &pdev->dev,
-                                          &wm8350_rtc_ops, THIS_MODULE);
+        wm_rtc->rtc = devm_rtc_device_register(&pdev->dev, "wm8350",
+                                        &wm8350_rtc_ops, THIS_MODULE);
         if (IS_ERR(wm_rtc->rtc)) {
                 ret = PTR_ERR(wm_rtc->rtc);
                 dev_err(&pdev->dev, "failed to register RTC: %d\n", ret);
@@ -462,20 +458,15 @@ static int wm8350_rtc_probe(struct platform_device *pdev)
 static int wm8350_rtc_remove(struct platform_device *pdev)
 {
         struct wm8350 *wm8350 = platform_get_drvdata(pdev);
-        struct wm8350_rtc *wm_rtc = &wm8350->rtc;
 
         wm8350_free_irq(wm8350, WM8350_IRQ_RTC_SEC, wm8350);
         wm8350_free_irq(wm8350, WM8350_IRQ_RTC_ALM, wm8350);
 
-        rtc_device_unregister(wm_rtc->rtc);
-
         return 0;
 }
 
-static struct dev_pm_ops wm8350_rtc_pm_ops = {
-        .suspend = wm8350_rtc_suspend,
-        .resume = wm8350_rtc_resume,
-};
+static SIMPLE_DEV_PM_OPS(wm8350_rtc_pm_ops, wm8350_rtc_suspend,
+                        wm8350_rtc_resume);
 
 static struct platform_driver wm8350_rtc_driver = {
         .probe = wm8350_rtc_probe,
diff --git a/drivers/rtc/rtc-x1205.c b/drivers/rtc/rtc-x1205.c
index f36e59c6bc01..fa9b0679fb60 100644
--- a/drivers/rtc/rtc-x1205.c
+++ b/drivers/rtc/rtc-x1205.c
@@ -630,8 +630,8 @@ static int x1205_probe(struct i2c_client *client,
 
         dev_info(&client->dev, "chip found, driver version " DRV_VERSION "\n");
 
-        rtc = rtc_device_register(x1205_driver.driver.name, &client->dev,
-                                &x1205_rtc_ops, THIS_MODULE);
+        rtc = devm_rtc_device_register(&client->dev, x1205_driver.driver.name,
+                                        &x1205_rtc_ops, THIS_MODULE);
 
         if (IS_ERR(rtc))
                 return PTR_ERR(rtc);
@@ -653,21 +653,13 @@ static int x1205_probe(struct i2c_client *client,
 
         err = x1205_sysfs_register(&client->dev);
         if (err)
-                goto exit_devreg;
+                return err;
 
         return 0;
-
-exit_devreg:
-        rtc_device_unregister(rtc);
-
-        return err;
 }
 
 static int x1205_remove(struct i2c_client *client)
 {
-        struct rtc_device *rtc = i2c_get_clientdata(client);
-
-        rtc_device_unregister(rtc);
         x1205_sysfs_unregister(&client->dev);
         return 0;
 }
diff --git a/drivers/scsi/fcoe/fcoe_ctlr.c b/drivers/scsi/fcoe/fcoe_ctlr.c
index a76247201be5..cd743c545ce9 100644
--- a/drivers/scsi/fcoe/fcoe_ctlr.c
+++ b/drivers/scsi/fcoe/fcoe_ctlr.c
@@ -2161,7 +2161,7 @@ static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
 
         if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
                 fip->probe_tries++;
-                wait = random32() % FIP_VN_PROBE_WAIT;
+                wait = prandom_u32() % FIP_VN_PROBE_WAIT;
         } else
                 wait = FIP_VN_RLIM_INT;
         mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
@@ -2794,7 +2794,7 @@ static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
                                           fcoe_all_vn2vn, 0);
                         fip->port_ka_time = jiffies +
                                  msecs_to_jiffies(FIP_VN_BEACON_INT +
-                                        (random32() % FIP_VN_BEACON_FUZZ));
+                                        (prandom_u32() % FIP_VN_BEACON_FUZZ));
                 }
                 if (time_before(fip->port_ka_time, next_time))
                         next_time = fip->port_ka_time;
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index d7096ad94d3f..bfda18467ee6 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -1732,7 +1732,7 @@ lpfc_check_pending_fcoe_event(struct lpfc_hba *phba, uint8_t unreg_fcf)
  * use through a sequence of @fcf_cnt eligible FCF records with equal
  * probability. To perform integer manunipulation of random numbers with
  * size unit32_t, the lower 16 bits of the 32-bit random number returned
- * from random32() are taken as the random random number generated.
+ * from prandom_u32() are taken as the random random number generated.
  *
  * Returns true when outcome is for the newly read FCF record should be
  * chosen; otherwise, return false when outcome is for keeping the previously
@@ -1744,7 +1744,7 @@ lpfc_sli4_new_fcf_random_select(struct lpfc_hba *phba, uint32_t fcf_cnt)
         uint32_t rand_num;
 
         /* Get 16-bit uniform random number */
-        rand_num = (0xFFFF & random32());
+        rand_num = 0xFFFF & prandom_u32();
 
         /* Decision with probability 1/fcf_cnt */
         if ((fcf_cnt * rand_num) < 0xFFFF)
@@ -2380,7 +2380,7 @@ lpfc_mbx_cmpl_fcf_scan_read_fcf_rec(struct lpfc_hba *phba, LPFC_MBOXQ_t *mboxq)
                 phba->fcf.eligible_fcf_cnt = 1;
                 /* Seeding the random number generator for random selection */
                 seed = (uint32_t)(0xFFFFFFFF & jiffies);
-                srandom32(seed);
+                prandom_seed(seed);
         }
         spin_unlock_irq(&phba->hbalock);
         goto read_next_fcf;
diff --git a/drivers/uwb/rsv.c b/drivers/uwb/rsv.c
index 0b0d8bce842e..f4ae05f78c42 100644
--- a/drivers/uwb/rsv.c
+++ b/drivers/uwb/rsv.c
@@ -231,7 +231,7 @@ void uwb_rsv_backoff_win_increment(struct uwb_rc *rc)
                 return;
 
         bow->window <<= 1;
-        bow->n = random32() & (bow->window - 1);
+        bow->n = prandom_u32() & (bow->window - 1);
         dev_dbg(dev, "new_window=%d, n=%d\n: ", bow->window, bow->n);
 
         /* reset the timer associated variables */
@@ -557,7 +557,7 @@ int uwb_rsv_establish(struct uwb_rsv *rsv)
         if (ret)
                 goto out;
 
-        rsv->tiebreaker = random32() & 1;
+        rsv->tiebreaker = prandom_u32() & 1;
         /* get available mas bitmap */
         uwb_drp_available(rc, &available);
 
diff --git a/drivers/video/backlight/Kconfig b/drivers/video/backlight/Kconfig
index db10d0120d2b..2e166c3fc4c3 100644
--- a/drivers/video/backlight/Kconfig
+++ b/drivers/video/backlight/Kconfig
@@ -59,6 +59,13 @@ config LCD_LTV350QV
 
           The LTV350QV panel is present on all ATSTK1000 boards.
 
+config LCD_ILI922X
+        tristate "ILI Technology ILI9221/ILI9222 support"
+        depends on SPI
+        help
+          If you have a panel based on the ILI9221/9222 controller
+          chip then say y to include a driver for it.
+
 config LCD_ILI9320
         tristate "ILI Technology ILI9320 controller support"
         depends on SPI
@@ -161,7 +168,7 @@ if BACKLIGHT_CLASS_DEVICE
 config BACKLIGHT_ATMEL_LCDC
         bool "Atmel LCDC Contrast-as-Backlight control"
         depends on FB_ATMEL
-        default y if MACH_SAM9261EK || MACH_SAM9G10EK || MACH_SAM9263EK
+        default y if MACH_AT91SAM9261EK || MACH_AT91SAM9G10EK || MACH_AT91SAM9263EK
         help
           This provides a backlight control internal to the Atmel LCDC
           driver.  If the LCD "contrast control" on your board is wired
diff --git a/drivers/video/backlight/Makefile b/drivers/video/backlight/Makefile
index 96c4d620c5ce..92711fe60464 100644
--- a/drivers/video/backlight/Makefile
+++ b/drivers/video/backlight/Makefile
@@ -5,6 +5,7 @@ obj-$(CONFIG_LCD_CLASS_DEVICE)		+= lcd.o
 obj-$(CONFIG_LCD_CORGI)                 += corgi_lcd.o
 obj-$(CONFIG_LCD_HP700)                 += jornada720_lcd.o
 obj-$(CONFIG_LCD_HX8357)                += hx8357.o
+obj-$(CONFIG_LCD_ILI922X)               += ili922x.o
 obj-$(CONFIG_LCD_ILI9320)               += ili9320.o
 obj-$(CONFIG_LCD_L4F00242T03)           += l4f00242t03.o
 obj-$(CONFIG_LCD_LD9040)                += ld9040.o
diff --git a/drivers/video/backlight/adp5520_bl.c b/drivers/video/backlight/adp5520_bl.c
index a1e41d4faa71..c84701b7ca6e 100644
--- a/drivers/video/backlight/adp5520_bl.c
+++ b/drivers/video/backlight/adp5520_bl.c
@@ -143,13 +143,16 @@ static int adp5520_bl_setup(struct backlight_device *bl)
 static ssize_t adp5520_show(struct device *dev, char *buf, int reg)
 {
         struct adp5520_bl *data = dev_get_drvdata(dev);
-        int error;
+        int ret;
         uint8_t reg_val;
 
         mutex_lock(&data->lock);
-        error = adp5520_read(data->master, reg, &reg_val);
+        ret = adp5520_read(data->master, reg, &reg_val);
         mutex_unlock(&data->lock);
 
+        if (ret < 0)
+                return ret;
+
         return sprintf(buf, "%u\n", reg_val);
 }
 
@@ -349,35 +352,34 @@ static int adp5520_bl_remove(struct platform_device *pdev)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int adp5520_bl_suspend(struct platform_device *pdev,
-                                 pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int adp5520_bl_suspend(struct device *dev)
 {
-        struct backlight_device *bl = platform_get_drvdata(pdev);
+        struct backlight_device *bl = dev_get_drvdata(dev);
+
         return adp5520_bl_set(bl, 0);
 }
 
-static int adp5520_bl_resume(struct platform_device *pdev)
+static int adp5520_bl_resume(struct device *dev)
 {
-        struct backlight_device *bl = platform_get_drvdata(pdev);
+        struct backlight_device *bl = dev_get_drvdata(dev);
 
         backlight_update_status(bl);
         return 0;
 }
-#else
-#define adp5520_bl_suspend      NULL
-#define adp5520_bl_resume       NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(adp5520_bl_pm_ops, adp5520_bl_suspend,
+                        adp5520_bl_resume);
+
 static struct platform_driver adp5520_bl_driver = {
         .driver         = {
                 .name   = "adp5520-backlight",
                 .owner  = THIS_MODULE,
+                .pm     = &adp5520_bl_pm_ops,
         },
         .probe          = adp5520_bl_probe,
         .remove         = adp5520_bl_remove,
-        .suspend        = adp5520_bl_suspend,
-        .resume         = adp5520_bl_resume,
 };
 
 module_platform_driver(adp5520_bl_driver);
diff --git a/drivers/video/backlight/adp8860_bl.c b/drivers/video/backlight/adp8860_bl.c
index a77c9cad3320..75b10f876127 100644
--- a/drivers/video/backlight/adp8860_bl.c
+++ b/drivers/video/backlight/adp8860_bl.c
@@ -249,12 +249,14 @@ static int adp8860_led_probe(struct i2c_client *client)
                 if (led_dat->id > 7 || led_dat->id < 1) {
                         dev_err(&client->dev, "Invalid LED ID %d\n",
                                 led_dat->id);
+                        ret = -EINVAL;
                         goto err;
                 }
 
                 if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) {
                         dev_err(&client->dev, "LED %d used by Backlight\n",
                                 led_dat->id);
+                        ret = -EBUSY;
                         goto err;
                 }
 
@@ -773,25 +775,29 @@ static int adp8860_remove(struct i2c_client *client)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int adp8860_i2c_suspend(struct i2c_client *client, pm_message_t message)
+#ifdef CONFIG_PM_SLEEP
+static int adp8860_i2c_suspend(struct device *dev)
 {
+        struct i2c_client *client = to_i2c_client(dev);
+
         adp8860_clr_bits(client, ADP8860_MDCR, NSTBY);
 
         return 0;
 }
 
-static int adp8860_i2c_resume(struct i2c_client *client)
+static int adp8860_i2c_resume(struct device *dev)
 {
+        struct i2c_client *client = to_i2c_client(dev);
+
         adp8860_set_bits(client, ADP8860_MDCR, NSTBY | BLEN);
 
         return 0;
 }
-#else
-#define adp8860_i2c_suspend NULL
-#define adp8860_i2c_resume NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(adp8860_i2c_pm_ops, adp8860_i2c_suspend,
+                        adp8860_i2c_resume);
+
 static const struct i2c_device_id adp8860_id[] = {
         { "adp8860", adp8860 },
         { "adp8861", adp8861 },
@@ -802,12 +808,11 @@ MODULE_DEVICE_TABLE(i2c, adp8860_id);
 
 static struct i2c_driver adp8860_driver = {
         .driver = {
-                .name = KBUILD_MODNAME,
+                .name   = KBUILD_MODNAME,
+                .pm     = &adp8860_i2c_pm_ops,
         },
         .probe    = adp8860_probe,
         .remove   = adp8860_remove,
-        .suspend = adp8860_i2c_suspend,
-        .resume  = adp8860_i2c_resume,
         .id_table = adp8860_id,
 };
 
diff --git a/drivers/video/backlight/adp8870_bl.c b/drivers/video/backlight/adp8870_bl.c
index 712c25a0d8fe..90049d7b5c60 100644
--- a/drivers/video/backlight/adp8870_bl.c
+++ b/drivers/video/backlight/adp8870_bl.c
@@ -274,12 +274,14 @@ static int adp8870_led_probe(struct i2c_client *client)
                 if (led_dat->id > 7 || led_dat->id < 1) {
                         dev_err(&client->dev, "Invalid LED ID %d\n",
                                 led_dat->id);
+                        ret = -EINVAL;
                         goto err;
                 }
 
                 if (pdata->bl_led_assign & (1 << (led_dat->id - 1))) {
                         dev_err(&client->dev, "LED %d used by Backlight\n",
                                 led_dat->id);
+                        ret = -EBUSY;
                         goto err;
                 }
 
@@ -895,13 +897,13 @@ static int adp8870_probe(struct i2c_client *client,
 
         data->bl = bl;
 
-        if (pdata->en_ambl_sens)
+        if (pdata->en_ambl_sens) {
                 ret = sysfs_create_group(&bl->dev.kobj,
                         &adp8870_bl_attr_group);
-
-        if (ret) {
-                dev_err(&client->dev, "failed to register sysfs\n");
-                goto out1;
+                if (ret) {
+                        dev_err(&client->dev, "failed to register sysfs\n");
+                        goto out1;
+                }
         }
 
         ret = adp8870_bl_setup(bl);
@@ -947,25 +949,29 @@ static int adp8870_remove(struct i2c_client *client)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int adp8870_i2c_suspend(struct i2c_client *client, pm_message_t message)
+#ifdef CONFIG_PM_SLEEP
+static int adp8870_i2c_suspend(struct device *dev)
 {
+        struct i2c_client *client = to_i2c_client(dev);
+
         adp8870_clr_bits(client, ADP8870_MDCR, NSTBY);
 
         return 0;
 }
 
-static int adp8870_i2c_resume(struct i2c_client *client)
+static int adp8870_i2c_resume(struct device *dev)
 {
+        struct i2c_client *client = to_i2c_client(dev);
+
         adp8870_set_bits(client, ADP8870_MDCR, NSTBY | BLEN);
 
         return 0;
 }
-#else
-#define adp8870_i2c_suspend NULL
-#define adp8870_i2c_resume NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(adp8870_i2c_pm_ops, adp8870_i2c_suspend,
+                        adp8870_i2c_resume);
+
 static const struct i2c_device_id adp8870_id[] = {
         { "adp8870", 0 },
         { }
@@ -974,12 +980,11 @@ MODULE_DEVICE_TABLE(i2c, adp8870_id);
 
 static struct i2c_driver adp8870_driver = {
         .driver = {
-                .name = KBUILD_MODNAME,
+                .name   = KBUILD_MODNAME,
+                .pm     = &adp8870_i2c_pm_ops,
         },
         .probe    = adp8870_probe,
         .remove   = adp8870_remove,
-        .suspend = adp8870_i2c_suspend,
-        .resume  = adp8870_i2c_resume,
         .id_table = adp8870_id,
 };
 
diff --git a/drivers/video/backlight/ams369fg06.c b/drivers/video/backlight/ams369fg06.c
index c02aa2c2575a..319fef6cb422 100644
--- a/drivers/video/backlight/ams369fg06.c
+++ b/drivers/video/backlight/ams369fg06.c
@@ -533,12 +533,12 @@ static int ams369fg06_remove(struct spi_device *spi)
         return 0;
 }
 
-#if defined(CONFIG_PM)
-static int ams369fg06_suspend(struct spi_device *spi, pm_message_t mesg)
+#ifdef CONFIG_PM_SLEEP
+static int ams369fg06_suspend(struct device *dev)
 {
-        struct ams369fg06 *lcd = spi_get_drvdata(spi);
+        struct ams369fg06 *lcd = dev_get_drvdata(dev);
 
-        dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
+        dev_dbg(dev, "lcd->power = %d\n", lcd->power);
 
         /*
          * when lcd panel is suspend, lcd panel becomes off
@@ -547,19 +547,19 @@ static int ams369fg06_suspend(struct spi_device *spi, pm_message_t mesg)
         return ams369fg06_power(lcd, FB_BLANK_POWERDOWN);
 }
 
-static int ams369fg06_resume(struct spi_device *spi)
+static int ams369fg06_resume(struct device *dev)
 {
-        struct ams369fg06 *lcd = spi_get_drvdata(spi);
+        struct ams369fg06 *lcd = dev_get_drvdata(dev);
 
         lcd->power = FB_BLANK_POWERDOWN;
 
         return ams369fg06_power(lcd, FB_BLANK_UNBLANK);
 }
-#else
-#define ams369fg06_suspend      NULL
-#define ams369fg06_resume       NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(ams369fg06_pm_ops, ams369fg06_suspend,
+                        ams369fg06_resume);
+
 static void ams369fg06_shutdown(struct spi_device *spi)
 {
         struct ams369fg06 *lcd = spi_get_drvdata(spi);
@@ -571,12 +571,11 @@ static struct spi_driver ams369fg06_driver = {
         .driver = {
                 .name   = "ams369fg06",
                 .owner  = THIS_MODULE,
+                .pm     = &ams369fg06_pm_ops,
         },
         .probe          = ams369fg06_probe,
         .remove         = ams369fg06_remove,
         .shutdown       = ams369fg06_shutdown,
-        .suspend        = ams369fg06_suspend,
-        .resume         = ams369fg06_resume,
 };
 
 module_spi_driver(ams369fg06_driver);
diff --git a/drivers/video/backlight/as3711_bl.c b/drivers/video/backlight/as3711_bl.c
index 41d52fe52543..123887cd76bd 100644
--- a/drivers/video/backlight/as3711_bl.c
+++ b/drivers/video/backlight/as3711_bl.c
@@ -258,6 +258,109 @@ static int as3711_bl_register(struct platform_device *pdev,
         return 0;
 }
 
+static int as3711_backlight_parse_dt(struct device *dev)
+{
+        struct as3711_bl_pdata *pdata = dev_get_platdata(dev);
+        struct device_node *bl =
+                of_find_node_by_name(dev->parent->of_node, "backlight"), *fb;
+        int ret;
+
+        if (!bl) {
+                dev_dbg(dev, "backlight node not found\n");
+                return -ENODEV;
+        }
+
+        fb = of_parse_phandle(bl, "su1-dev", 0);
+        if (fb) {
+                pdata->su1_fb = fb->full_name;
+
+                ret = of_property_read_u32(bl, "su1-max-uA", &pdata->su1_max_uA);
+                if (pdata->su1_max_uA <= 0)
+                        ret = -EINVAL;
+                if (ret < 0)
+                        return ret;
+        }
+
+        fb = of_parse_phandle(bl, "su2-dev", 0);
+        if (fb) {
+                int count = 0;
+
+                pdata->su2_fb = fb->full_name;
+
+                ret = of_property_read_u32(bl, "su2-max-uA", &pdata->su2_max_uA);
+                if (pdata->su2_max_uA <= 0)
+                        ret = -EINVAL;
+                if (ret < 0)
+                        return ret;
+
+                if (of_find_property(bl, "su2-feedback-voltage", NULL)) {
+                        pdata->su2_feedback = AS3711_SU2_VOLTAGE;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-feedback-curr1", NULL)) {
+                        pdata->su2_feedback = AS3711_SU2_CURR1;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-feedback-curr2", NULL)) {
+                        pdata->su2_feedback = AS3711_SU2_CURR2;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-feedback-curr3", NULL)) {
+                        pdata->su2_feedback = AS3711_SU2_CURR3;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-feedback-curr-auto", NULL)) {
+                        pdata->su2_feedback = AS3711_SU2_CURR_AUTO;
+                        count++;
+                }
+                if (count != 1)
+                        return -EINVAL;
+
+                count = 0;
+                if (of_find_property(bl, "su2-fbprot-lx-sd4", NULL)) {
+                        pdata->su2_fbprot = AS3711_SU2_LX_SD4;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-fbprot-gpio2", NULL)) {
+                        pdata->su2_fbprot = AS3711_SU2_GPIO2;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-fbprot-gpio3", NULL)) {
+                        pdata->su2_fbprot = AS3711_SU2_GPIO3;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-fbprot-gpio4", NULL)) {
+                        pdata->su2_fbprot = AS3711_SU2_GPIO4;
+                        count++;
+                }
+                if (count != 1)
+                        return -EINVAL;
+
+                count = 0;
+                if (of_find_property(bl, "su2-auto-curr1", NULL)) {
+                        pdata->su2_auto_curr1 = true;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-auto-curr2", NULL)) {
+                        pdata->su2_auto_curr2 = true;
+                        count++;
+                }
+                if (of_find_property(bl, "su2-auto-curr3", NULL)) {
+                        pdata->su2_auto_curr3 = true;
+                        count++;
+                }
+
+                /*
+                 * At least one su2-auto-curr* must be specified iff
+                 * AS3711_SU2_CURR_AUTO is used
+                 */
+                if (!count ^ (pdata->su2_feedback != AS3711_SU2_CURR_AUTO))
+                        return -EINVAL;
+        }
+
+        return 0;
+}
+
 static int as3711_backlight_probe(struct platform_device *pdev)
 {
         struct as3711_bl_pdata *pdata = dev_get_platdata(&pdev->dev);
@@ -267,11 +370,24 @@ static int as3711_backlight_probe(struct platform_device *pdev)
         unsigned int max_brightness;
         int ret;
 
-        if (!pdata || (!pdata->su1_fb && !pdata->su2_fb)) {
+        if (!pdata) {
                 dev_err(&pdev->dev, "No platform data, exiting...\n");
                 return -ENODEV;
         }
 
+        if (pdev->dev.parent->of_node) {
+                ret = as3711_backlight_parse_dt(&pdev->dev);
+                if (ret < 0) {
+                        dev_err(&pdev->dev, "DT parsing failed: %d\n", ret);
+                        return ret;
+                }
+        }
+
+        if (!pdata->su1_fb && !pdata->su2_fb) {
+                dev_err(&pdev->dev, "No framebuffer specified\n");
+                return -EINVAL;
+        }
+
         /*
          * Due to possible hardware damage I chose to block all modes,
          * unsupported on my hardware. Anyone, wishing to use any of those modes
diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
index de5e5e74e2a7..a60d6afca97c 100644
--- a/drivers/video/backlight/atmel-pwm-bl.c
+++ b/drivers/video/backlight/atmel-pwm-bl.c
@@ -118,7 +118,7 @@ static const struct backlight_ops atmel_pwm_bl_ops = {
         .update_status  = atmel_pwm_bl_set_intensity,
 };
 
-static int atmel_pwm_bl_probe(struct platform_device *pdev)
+static int __init atmel_pwm_bl_probe(struct platform_device *pdev)
 {
         struct backlight_properties props;
         const struct atmel_pwm_bl_platform_data *pdata;
@@ -225,17 +225,7 @@ static struct platform_driver atmel_pwm_bl_driver = {
         .remove = __exit_p(atmel_pwm_bl_remove),
 };
 
-static int __init atmel_pwm_bl_init(void)
-{
-        return platform_driver_probe(&atmel_pwm_bl_driver, atmel_pwm_bl_probe);
-}
-module_init(atmel_pwm_bl_init);
-
-static void __exit atmel_pwm_bl_exit(void)
-{
-        platform_driver_unregister(&atmel_pwm_bl_driver);
-}
-module_exit(atmel_pwm_bl_exit);
+module_platform_driver_probe(atmel_pwm_bl_driver, atmel_pwm_bl_probe);
 
 MODULE_AUTHOR("Hans-Christian egtvedt <hans-christian.egtvedt@atmel.com>");
 MODULE_DESCRIPTION("Atmel PWM backlight driver");
diff --git a/drivers/video/backlight/corgi_lcd.c b/drivers/video/backlight/corgi_lcd.c
index aa782f302983..c97867a717a7 100644
--- a/drivers/video/backlight/corgi_lcd.c
+++ b/drivers/video/backlight/corgi_lcd.c
@@ -457,10 +457,10 @@ static const struct backlight_ops corgi_bl_ops = {
         .update_status  = corgi_bl_update_status,
 };
 
-#ifdef CONFIG_PM
-static int corgi_lcd_suspend(struct spi_device *spi, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int corgi_lcd_suspend(struct device *dev)
 {
-        struct corgi_lcd *lcd = spi_get_drvdata(spi);
+        struct corgi_lcd *lcd = dev_get_drvdata(dev);
 
         corgibl_flags |= CORGIBL_SUSPENDED;
         corgi_bl_set_intensity(lcd, 0);
@@ -468,20 +468,19 @@ static int corgi_lcd_suspend(struct spi_device *spi, pm_message_t state)
         return 0;
 }
 
-static int corgi_lcd_resume(struct spi_device *spi)
+static int corgi_lcd_resume(struct device *dev)
 {
-        struct corgi_lcd *lcd = spi_get_drvdata(spi);
+        struct corgi_lcd *lcd = dev_get_drvdata(dev);
 
         corgibl_flags &= ~CORGIBL_SUSPENDED;
         corgi_lcd_set_power(lcd->lcd_dev, FB_BLANK_UNBLANK);
         backlight_update_status(lcd->bl_dev);
         return 0;
 }
-#else
-#define corgi_lcd_suspend       NULL
-#define corgi_lcd_resume        NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(corgi_lcd_pm_ops, corgi_lcd_suspend, corgi_lcd_resume);
+
 static int setup_gpio_backlight(struct corgi_lcd *lcd,
                                 struct corgi_lcd_platform_data *pdata)
 {
@@ -611,11 +610,10 @@ static struct spi_driver corgi_lcd_driver = {
         .driver         = {
                 .name   = "corgi-lcd",
                 .owner  = THIS_MODULE,
+                .pm     = &corgi_lcd_pm_ops,
         },
         .probe          = corgi_lcd_probe,
         .remove         = corgi_lcd_remove,
-        .suspend        = corgi_lcd_suspend,
-        .resume         = corgi_lcd_resume,
 };
 
 module_spi_driver(corgi_lcd_driver);
diff --git a/drivers/video/backlight/da903x_bl.c b/drivers/video/backlight/da903x_bl.c
index 8179cef0730f..67cadd30e273 100644
--- a/drivers/video/backlight/da903x_bl.c
+++ b/drivers/video/backlight/da903x_bl.c
@@ -88,16 +88,21 @@ static int da903x_backlight_update_status(struct backlight_device *bl)
         if (bl->props.fb_blank != FB_BLANK_UNBLANK)
                 brightness = 0;
 
+        if (bl->props.state & BL_CORE_SUSPENDED)
+                brightness = 0;
+
         return da903x_backlight_set(bl, brightness);
 }
 
 static int da903x_backlight_get_brightness(struct backlight_device *bl)
 {
         struct da903x_backlight_data *data = bl_get_data(bl);
+
         return data->current_brightness;
 }
 
 static const struct backlight_ops da903x_backlight_ops = {
+        .options        = BL_CORE_SUSPENDRESUME,
         .update_status  = da903x_backlight_update_status,
         .get_brightness = da903x_backlight_get_brightness,
 };
@@ -161,35 +166,10 @@ static int da903x_backlight_remove(struct platform_device *pdev)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int da903x_backlight_suspend(struct device *dev)
-{
-        struct backlight_device *bl = dev_get_drvdata(dev);
-
-        return da903x_backlight_set(bl, 0);
-}
-
-static int da903x_backlight_resume(struct device *dev)
-{
-        struct backlight_device *bl = dev_get_drvdata(dev);
-
-        backlight_update_status(bl);
-        return 0;
-}
-
-static const struct dev_pm_ops da903x_backlight_pm_ops = {
-        .suspend        = da903x_backlight_suspend,
-        .resume         = da903x_backlight_resume,
-};
-#endif
-
 static struct platform_driver da903x_backlight_driver = {
         .driver         = {
                 .name   = "da903x-backlight",
                 .owner  = THIS_MODULE,
-#ifdef CONFIG_PM
-                .pm     = &da903x_backlight_pm_ops,
-#endif
         },
         .probe          = da903x_backlight_probe,
         .remove         = da903x_backlight_remove,
diff --git a/drivers/video/backlight/ep93xx_bl.c b/drivers/video/backlight/ep93xx_bl.c
index ef3e21e8f825..33455821dd31 100644
--- a/drivers/video/backlight/ep93xx_bl.c
+++ b/drivers/video/backlight/ep93xx_bl.c
@@ -60,7 +60,7 @@ static const struct backlight_ops ep93xxbl_ops = {
         .get_brightness = ep93xxbl_get_brightness,
 };
 
-static int __init ep93xxbl_probe(struct platform_device *dev)
+static int ep93xxbl_probe(struct platform_device *dev)
 {
         struct ep93xxbl *ep93xxbl;
         struct backlight_device *bl;
@@ -115,35 +115,33 @@ static int ep93xxbl_remove(struct platform_device *dev)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int ep93xxbl_suspend(struct platform_device *dev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int ep93xxbl_suspend(struct device *dev)
 {
-        struct backlight_device *bl = platform_get_drvdata(dev);
+        struct backlight_device *bl = dev_get_drvdata(dev);
 
         return ep93xxbl_set(bl, 0);
 }
 
-static int ep93xxbl_resume(struct platform_device *dev)
+static int ep93xxbl_resume(struct device *dev)
 {
-        struct backlight_device *bl = platform_get_drvdata(dev);
+        struct backlight_device *bl = dev_get_drvdata(dev);
 
         backlight_update_status(bl);
         return 0;
 }
-#else
-#define ep93xxbl_suspend        NULL
-#define ep93xxbl_resume         NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(ep93xxbl_pm_ops, ep93xxbl_suspend, ep93xxbl_resume);
+
 static struct platform_driver ep93xxbl_driver = {
         .driver         = {
                 .name   = "ep93xx-bl",
                 .owner  = THIS_MODULE,
+                .pm     = &ep93xxbl_pm_ops,
         },
         .probe          = ep93xxbl_probe,
         .remove         = ep93xxbl_remove,
-        .suspend        = ep93xxbl_suspend,
-        .resume         = ep93xxbl_resume,
 };
 
 module_platform_driver(ep93xxbl_driver);
diff --git a/drivers/video/backlight/generic_bl.c b/drivers/video/backlight/generic_bl.c
index 0ae155be9c89..19e393b41438 100644
--- a/drivers/video/backlight/generic_bl.c
+++ b/drivers/video/backlight/generic_bl.c
@@ -9,8 +9,6 @@
  *
  */
 
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -108,7 +106,7 @@ static int genericbl_probe(struct platform_device *pdev)
 
         generic_backlight_device = bd;
 
-        pr_info("Generic Backlight Driver Initialized.\n");
+        dev_info(&pdev->dev, "Generic Backlight Driver Initialized.\n");
         return 0;
 }
 
@@ -122,7 +120,7 @@ static int genericbl_remove(struct platform_device *pdev)
 
         backlight_device_unregister(bd);
 
-        pr_info("Generic Backlight Driver Unloaded\n");
+        dev_info(&pdev->dev, "Generic Backlight Driver Unloaded\n");
         return 0;
 }
 
diff --git a/drivers/video/backlight/hp680_bl.c b/drivers/video/backlight/hp680_bl.c
index 5cefd73526f8..00076ecfe9b8 100644
--- a/drivers/video/backlight/hp680_bl.c
+++ b/drivers/video/backlight/hp680_bl.c
@@ -64,29 +64,28 @@ static void hp680bl_send_intensity(struct backlight_device *bd)
 }
 
 
-#ifdef CONFIG_PM
-static int hp680bl_suspend(struct platform_device *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int hp680bl_suspend(struct device *dev)
 {
-        struct backlight_device *bd = platform_get_drvdata(pdev);
+        struct backlight_device *bd = dev_get_drvdata(dev);
 
         hp680bl_suspended = 1;
         hp680bl_send_intensity(bd);
         return 0;
 }
 
-static int hp680bl_resume(struct platform_device *pdev)
+static int hp680bl_resume(struct device *dev)
 {
-        struct backlight_device *bd = platform_get_drvdata(pdev);
+        struct backlight_device *bd = dev_get_drvdata(dev);
 
         hp680bl_suspended = 0;
         hp680bl_send_intensity(bd);
         return 0;
 }
-#else
-#define hp680bl_suspend NULL
-#define hp680bl_resume  NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(hp680bl_pm_ops, hp680bl_suspend, hp680bl_resume);
+
 static int hp680bl_set_intensity(struct backlight_device *bd)
 {
         hp680bl_send_intensity(bd);
@@ -140,10 +139,9 @@ static int hp680bl_remove(struct platform_device *pdev)
 static struct platform_driver hp680bl_driver = {
         .probe          = hp680bl_probe,
         .remove         = hp680bl_remove,
-        .suspend        = hp680bl_suspend,
-        .resume         = hp680bl_resume,
         .driver         = {
                 .name   = "hp680-bl",
+                .pm     = &hp680bl_pm_ops,
         },
 };
 
diff --git a/drivers/video/backlight/ili922x.c b/drivers/video/backlight/ili922x.c
new file mode 100644
index 000000000000..d9f65c2d9b01
--- /dev/null
+++ b/drivers/video/backlight/ili922x.c
@@ -0,0 +1,555 @@
+/*
+ * (C) Copyright 2008
+ * Stefano Babic, DENX Software Engineering, sbabic@denx.de.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This driver implements a lcd device for the ILITEK 922x display
+ * controller. The interface to the display is SPI and the display's
+ * memory is cyclically updated over the RGB interface.
+ */
+
+#include <linux/fb.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/lcd.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/slab.h>
+#include <linux/spi/spi.h>
+#include <linux/string.h>
+
+/* Register offset, see manual section 8.2 */
+#define REG_START_OSCILLATION                   0x00
+#define REG_DRIVER_CODE_READ                    0x00
+#define REG_DRIVER_OUTPUT_CONTROL               0x01
+#define REG_LCD_AC_DRIVEING_CONTROL             0x02
+#define REG_ENTRY_MODE                          0x03
+#define REG_COMPARE_1                           0x04
+#define REG_COMPARE_2                           0x05
+#define REG_DISPLAY_CONTROL_1                   0x07
+#define REG_DISPLAY_CONTROL_2                   0x08
+#define REG_DISPLAY_CONTROL_3                   0x09
+#define REG_FRAME_CYCLE_CONTROL                 0x0B
+#define REG_EXT_INTF_CONTROL                    0x0C
+#define REG_POWER_CONTROL_1                     0x10
+#define REG_POWER_CONTROL_2                     0x11
+#define REG_POWER_CONTROL_3                     0x12
+#define REG_POWER_CONTROL_4                     0x13
+#define REG_RAM_ADDRESS_SET                     0x21
+#define REG_WRITE_DATA_TO_GRAM                  0x22
+#define REG_RAM_WRITE_MASK1                     0x23
+#define REG_RAM_WRITE_MASK2                     0x24
+#define REG_GAMMA_CONTROL_1                     0x30
+#define REG_GAMMA_CONTROL_2                     0x31
+#define REG_GAMMA_CONTROL_3                     0x32
+#define REG_GAMMA_CONTROL_4                     0x33
+#define REG_GAMMA_CONTROL_5                     0x34
+#define REG_GAMMA_CONTROL_6                     0x35
+#define REG_GAMMA_CONTROL_7                     0x36
+#define REG_GAMMA_CONTROL_8                     0x37
+#define REG_GAMMA_CONTROL_9                     0x38
+#define REG_GAMMA_CONTROL_10                    0x39
+#define REG_GATE_SCAN_CONTROL                   0x40
+#define REG_VERT_SCROLL_CONTROL                 0x41
+#define REG_FIRST_SCREEN_DRIVE_POS              0x42
+#define REG_SECOND_SCREEN_DRIVE_POS             0x43
+#define REG_RAM_ADDR_POS_H                      0x44
+#define REG_RAM_ADDR_POS_V                      0x45
+#define REG_OSCILLATOR_CONTROL                  0x4F
+#define REG_GPIO                                0x60
+#define REG_OTP_VCM_PROGRAMMING                 0x61
+#define REG_OTP_VCM_STATUS_ENABLE               0x62
+#define REG_OTP_PROGRAMMING_ID_KEY              0x65
+
+/*
+ * maximum frequency for register access
+ * (not for the GRAM access)
+ */
+#define ILITEK_MAX_FREQ_REG     4000000
+
+/*
+ * Device ID as found in the datasheet (supports 9221 and 9222)
+ */
+#define ILITEK_DEVICE_ID        0x9220
+#define ILITEK_DEVICE_ID_MASK   0xFFF0
+
+/* Last two bits in the START BYTE */
+#define START_RS_INDEX          0
+#define START_RS_REG            1
+#define START_RW_WRITE          0
+#define START_RW_READ           1
+
+/**
+ * START_BYTE(id, rs, rw)
+ *
+ * Set the start byte according to the required operation.
+ * The start byte is defined as:
+ *   ----------------------------------
+ *  | 0 | 1 | 1 | 1 | 0 | ID | RS | RW |
+ *   ----------------------------------
+ * @id: display's id as set by the manufacturer
+ * @rs: operation type bit, one of:
+ *        - START_RS_INDEX      set the index register
+ *        - START_RS_REG        write/read registers/GRAM
+ * @rw: read/write operation
+ *       - START_RW_WRITE       write
+ *       - START_RW_READ        read
+ */
+#define START_BYTE(id, rs, rw)  \
+        (0x70 | (((id) & 0x01) << 2) | (((rs) & 0x01) << 1) | ((rw) & 0x01))
+
+/**
+ * CHECK_FREQ_REG(spi_device s, spi_transfer x) - Check the frequency
+ *      for the SPI transfer. According to the datasheet, the controller
+ *      accept higher frequency for the GRAM transfer, but it requires
+ *      lower frequency when the registers are read/written.
+ *      The macro sets the frequency in the spi_transfer structure if
+ *      the frequency exceeds the maximum value.
+ */
+#define CHECK_FREQ_REG(s, x)    \
+        do {                    \
+                if (s->max_speed_hz > ILITEK_MAX_FREQ_REG)      \
+                        ((struct spi_transfer *)x)->speed_hz =  \
+                                        ILITEK_MAX_FREQ_REG;    \
+        } while (0)
+
+#define CMD_BUFSIZE             16
+
+#define POWER_IS_ON(pwr)        ((pwr) <= FB_BLANK_NORMAL)
+
+#define set_tx_byte(b)          (tx_invert ? ~(b) : b)
+
+/**
+ * ili922x_id - id as set by manufacturer
+ */
+static int ili922x_id = 1;
+module_param(ili922x_id, int, 0);
+
+static int tx_invert;
+module_param(tx_invert, int, 0);
+
+/**
+ * driver's private structure
+ */
+struct ili922x {
+        struct spi_device *spi;
+        struct lcd_device *ld;
+        int power;
+};
+
+/**
+ * ili922x_read_status - read status register from display
+ * @spi: spi device
+ * @rs:  output value
+ */
+static int ili922x_read_status(struct spi_device *spi, u16 *rs)
+{
+        struct spi_message msg;
+        struct spi_transfer xfer;
+        unsigned char tbuf[CMD_BUFSIZE];
+        unsigned char rbuf[CMD_BUFSIZE];
+        int ret, i;
+
+        memset(&xfer, 0, sizeof(struct spi_transfer));
+        spi_message_init(&msg);
+        xfer.tx_buf = tbuf;
+        xfer.rx_buf = rbuf;
+        xfer.cs_change = 1;
+        CHECK_FREQ_REG(spi, &xfer);
+
+        tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_INDEX,
+                                         START_RW_READ));
+        /*
+         * we need 4-byte xfer here due to invalid dummy byte
+         * received after start byte
+         */
+        for (i = 1; i < 4; i++)
+                tbuf[i] = set_tx_byte(0);       /* dummy */
+
+        xfer.bits_per_word = 8;
+        xfer.len = 4;
+        spi_message_add_tail(&xfer, &msg);
+        ret = spi_sync(spi, &msg);
+        if (ret < 0) {
+                dev_dbg(&spi->dev, "Error sending SPI message 0x%x", ret);
+                return ret;
+        }
+
+        *rs = (rbuf[2] << 8) + rbuf[3];
+        return 0;
+}
+
+/**
+ * ili922x_read - read register from display
+ * @spi: spi device
+ * @reg: offset of the register to be read
+ * @rx:  output value
+ */
+static int ili922x_read(struct spi_device *spi, u8 reg, u16 *rx)
+{
+        struct spi_message msg;
+        struct spi_transfer xfer_regindex, xfer_regvalue;
+        unsigned char tbuf[CMD_BUFSIZE];
+        unsigned char rbuf[CMD_BUFSIZE];
+        int ret, len = 0, send_bytes;
+
+        memset(&xfer_regindex, 0, sizeof(struct spi_transfer));
+        memset(&xfer_regvalue, 0, sizeof(struct spi_transfer));
+        spi_message_init(&msg);
+        xfer_regindex.tx_buf = tbuf;
+        xfer_regindex.rx_buf = rbuf;
+        xfer_regindex.cs_change = 1;
+        CHECK_FREQ_REG(spi, &xfer_regindex);
+
+        tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_INDEX,
+                                         START_RW_WRITE));
+        tbuf[1] = set_tx_byte(0);
+        tbuf[2] = set_tx_byte(reg);
+        xfer_regindex.bits_per_word = 8;
+        len = xfer_regindex.len = 3;
+        spi_message_add_tail(&xfer_regindex, &msg);
+
+        send_bytes = len;
+
+        tbuf[len++] = set_tx_byte(START_BYTE(ili922x_id, START_RS_REG,
+                                             START_RW_READ));
+        tbuf[len++] = set_tx_byte(0);
+        tbuf[len] = set_tx_byte(0);
+
+        xfer_regvalue.cs_change = 1;
+        xfer_regvalue.len = 3;
+        xfer_regvalue.tx_buf = &tbuf[send_bytes];
+        xfer_regvalue.rx_buf = &rbuf[send_bytes];
+        CHECK_FREQ_REG(spi, &xfer_regvalue);
+
+        spi_message_add_tail(&xfer_regvalue, &msg);
+        ret = spi_sync(spi, &msg);
+        if (ret < 0) {
+                dev_dbg(&spi->dev, "Error sending SPI message 0x%x", ret);
+                return ret;
+        }
+
+        *rx = (rbuf[1 + send_bytes] << 8) + rbuf[2 + send_bytes];
+        return 0;
+}
+
+/**
+ * ili922x_write - write a controller register
+ * @spi: struct spi_device *
+ * @reg: offset of the register to be written
+ * @value: value to be written
+ */
+static int ili922x_write(struct spi_device *spi, u8 reg, u16 value)
+{
+        struct spi_message msg;
+        struct spi_transfer xfer_regindex, xfer_regvalue;
+        unsigned char tbuf[CMD_BUFSIZE];
+        unsigned char rbuf[CMD_BUFSIZE];
+        int ret, len = 0;
+
+        memset(&xfer_regindex, 0, sizeof(struct spi_transfer));
+        memset(&xfer_regvalue, 0, sizeof(struct spi_transfer));
+
+        spi_message_init(&msg);
+        xfer_regindex.tx_buf = tbuf;
+        xfer_regindex.rx_buf = rbuf;
+        xfer_regindex.cs_change = 1;
+        CHECK_FREQ_REG(spi, &xfer_regindex);
+
+        tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_INDEX,
+                                         START_RW_WRITE));
+        tbuf[1] = set_tx_byte(0);
+        tbuf[2] = set_tx_byte(reg);
+        xfer_regindex.bits_per_word = 8;
+        xfer_regindex.len = 3;
+        spi_message_add_tail(&xfer_regindex, &msg);
+
+        ret = spi_sync(spi, &msg);
+
+        spi_message_init(&msg);
+        len = 0;
+        tbuf[0] = set_tx_byte(START_BYTE(ili922x_id, START_RS_REG,
+                                         START_RW_WRITE));
+        tbuf[1] = set_tx_byte((value & 0xFF00) >> 8);
+        tbuf[2] = set_tx_byte(value & 0x00FF);
+
+        xfer_regvalue.cs_change = 1;
+        xfer_regvalue.len = 3;
+        xfer_regvalue.tx_buf = tbuf;
+        xfer_regvalue.rx_buf = rbuf;
+        CHECK_FREQ_REG(spi, &xfer_regvalue);
+
+        spi_message_add_tail(&xfer_regvalue, &msg);
+
+        ret = spi_sync(spi, &msg);
+        if (ret < 0) {
+                dev_err(&spi->dev, "Error sending SPI message 0x%x", ret);
+                return ret;
+        }
+        return 0;
+}
+
+#ifdef DEBUG
+/**
+ * ili922x_reg_dump - dump all registers
+ */
+static void ili922x_reg_dump(struct spi_device *spi)
+{
+        u8 reg;
+        u16 rx;
+
+        dev_dbg(&spi->dev, "ILI922x configuration registers:\n");
+        for (reg = REG_START_OSCILLATION;
+             reg <= REG_OTP_PROGRAMMING_ID_KEY; reg++) {
+                ili922x_read(spi, reg, &rx);
+                dev_dbg(&spi->dev, "reg @ 0x%02X: 0x%04X\n", reg, rx);
+        }
+}
+#else
+static inline void ili922x_reg_dump(struct spi_device *spi) {}
+#endif
+
+/**
+ * set_write_to_gram_reg - initialize the display to write the GRAM
+ * @spi: spi device
+ */
+static void set_write_to_gram_reg(struct spi_device *spi)
+{
+        struct spi_message msg;
+        struct spi_transfer xfer;
+        unsigned char tbuf[CMD_BUFSIZE];
+
+        memset(&xfer, 0, sizeof(struct spi_transfer));
+
+        spi_message_init(&msg);
+        xfer.tx_buf = tbuf;
+        xfer.rx_buf = NULL;
+        xfer.cs_change = 1;
+
+        tbuf[0] = START_BYTE(ili922x_id, START_RS_INDEX, START_RW_WRITE);
+        tbuf[1] = 0;
+        tbuf[2] = REG_WRITE_DATA_TO_GRAM;
+
+        xfer.bits_per_word = 8;
+        xfer.len = 3;
+        spi_message_add_tail(&xfer, &msg);
+        spi_sync(spi, &msg);
+}
+
+/**
+ * ili922x_poweron - turn the display on
+ * @spi: spi device
+ *
+ * The sequence to turn on the display is taken from
+ * the datasheet and/or the example code provided by the
+ * manufacturer.
+ */
+static int ili922x_poweron(struct spi_device *spi)
+{
+        int ret;
+
+        /* Power on */
+        ret = ili922x_write(spi, REG_POWER_CONTROL_1, 0x0000);
+        usleep_range(10000, 10500);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_2, 0x0000);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_3, 0x0000);
+        msleep(40);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_4, 0x0000);
+        msleep(40);
+        /* register 0x56 is not documented in the datasheet */
+        ret += ili922x_write(spi, 0x56, 0x080F);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_1, 0x4240);
+        usleep_range(10000, 10500);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_2, 0x0000);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_3, 0x0014);
+        msleep(40);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_4, 0x1319);
+        msleep(40);
+
+        return ret;
+}
+
+/**
+ * ili922x_poweroff - turn the display off
+ * @spi: spi device
+ */
+static int ili922x_poweroff(struct spi_device *spi)
+{
+        int ret;
+
+        /* Power off */
+        ret = ili922x_write(spi, REG_POWER_CONTROL_1, 0x0000);
+        usleep_range(10000, 10500);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_2, 0x0000);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_3, 0x0000);
+        msleep(40);
+        ret += ili922x_write(spi, REG_POWER_CONTROL_4, 0x0000);
+        msleep(40);
+
+        return ret;
+}
+
+/**
+ * ili922x_display_init - initialize the display by setting
+ *                        the configuration registers
+ * @spi: spi device
+ */
+static void ili922x_display_init(struct spi_device *spi)
+{
+        ili922x_write(spi, REG_START_OSCILLATION, 1);
+        usleep_range(10000, 10500);
+        ili922x_write(spi, REG_DRIVER_OUTPUT_CONTROL, 0x691B);
+        ili922x_write(spi, REG_LCD_AC_DRIVEING_CONTROL, 0x0700);
+        ili922x_write(spi, REG_ENTRY_MODE, 0x1030);
+        ili922x_write(spi, REG_COMPARE_1, 0x0000);
+        ili922x_write(spi, REG_COMPARE_2, 0x0000);
+        ili922x_write(spi, REG_DISPLAY_CONTROL_1, 0x0037);
+        ili922x_write(spi, REG_DISPLAY_CONTROL_2, 0x0202);
+        ili922x_write(spi, REG_DISPLAY_CONTROL_3, 0x0000);
+        ili922x_write(spi, REG_FRAME_CYCLE_CONTROL, 0x0000);
+
+        /* Set RGB interface */
+        ili922x_write(spi, REG_EXT_INTF_CONTROL, 0x0110);
+
+        ili922x_poweron(spi);
+
+        ili922x_write(spi, REG_GAMMA_CONTROL_1, 0x0302);
+        ili922x_write(spi, REG_GAMMA_CONTROL_2, 0x0407);
+        ili922x_write(spi, REG_GAMMA_CONTROL_3, 0x0304);
+        ili922x_write(spi, REG_GAMMA_CONTROL_4, 0x0203);
+        ili922x_write(spi, REG_GAMMA_CONTROL_5, 0x0706);
+        ili922x_write(spi, REG_GAMMA_CONTROL_6, 0x0407);
+        ili922x_write(spi, REG_GAMMA_CONTROL_7, 0x0706);
+        ili922x_write(spi, REG_GAMMA_CONTROL_8, 0x0000);
+        ili922x_write(spi, REG_GAMMA_CONTROL_9, 0x0C06);
+        ili922x_write(spi, REG_GAMMA_CONTROL_10, 0x0F00);
+        ili922x_write(spi, REG_RAM_ADDRESS_SET, 0x0000);
+        ili922x_write(spi, REG_GATE_SCAN_CONTROL, 0x0000);
+        ili922x_write(spi, REG_VERT_SCROLL_CONTROL, 0x0000);
+        ili922x_write(spi, REG_FIRST_SCREEN_DRIVE_POS, 0xDB00);
+        ili922x_write(spi, REG_SECOND_SCREEN_DRIVE_POS, 0xDB00);
+        ili922x_write(spi, REG_RAM_ADDR_POS_H, 0xAF00);
+        ili922x_write(spi, REG_RAM_ADDR_POS_V, 0xDB00);
+        ili922x_reg_dump(spi);
+        set_write_to_gram_reg(spi);
+}
+
+static int ili922x_lcd_power(struct ili922x *lcd, int power)
+{
+        int ret = 0;
+
+        if (POWER_IS_ON(power) && !POWER_IS_ON(lcd->power))
+                ret = ili922x_poweron(lcd->spi);
+        else if (!POWER_IS_ON(power) && POWER_IS_ON(lcd->power))
+                ret = ili922x_poweroff(lcd->spi);
+
+        if (!ret)
+                lcd->power = power;
+
+        return ret;
+}
+
+static int ili922x_set_power(struct lcd_device *ld, int power)
+{
+        struct ili922x *ili = lcd_get_data(ld);
+
+        return ili922x_lcd_power(ili, power);
+}
+
+static int ili922x_get_power(struct lcd_device *ld)
+{
+        struct ili922x *ili = lcd_get_data(ld);
+
+        return ili->power;
+}
+
+static struct lcd_ops ili922x_ops = {
+        .get_power = ili922x_get_power,
+        .set_power = ili922x_set_power,
+};
+
+static int ili922x_probe(struct spi_device *spi)
+{
+        struct ili922x *ili;
+        struct lcd_device *lcd;
+        int ret;
+        u16 reg = 0;
+
+        ili = devm_kzalloc(&spi->dev, sizeof(*ili), GFP_KERNEL);
+        if (!ili) {
+                dev_err(&spi->dev, "cannot alloc priv data\n");
+                return -ENOMEM;
+        }
+
+        ili->spi = spi;
+        spi_set_drvdata(spi, ili);
+
+        /* check if the device is connected */
+        ret = ili922x_read(spi, REG_DRIVER_CODE_READ, &reg);
+        if (ret || ((reg & ILITEK_DEVICE_ID_MASK) != ILITEK_DEVICE_ID)) {
+                dev_err(&spi->dev,
+                        "no LCD found: Chip ID 0x%x, ret %d\n",
+                        reg, ret);
+                return -ENODEV;
+        } else {
+                dev_info(&spi->dev, "ILI%x found, SPI freq %d, mode %d\n",
+                         reg, spi->max_speed_hz, spi->mode);
+        }
+
+        ret = ili922x_read_status(spi, &reg);
+        if (ret) {
+                dev_err(&spi->dev, "reading RS failed...\n");
+                return ret;
+        } else
+                dev_dbg(&spi->dev, "status: 0x%x\n", reg);
+
+        ili922x_display_init(spi);
+
+        ili->power = FB_BLANK_POWERDOWN;
+
+        lcd = lcd_device_register("ili922xlcd", &spi->dev, ili,
+                                  &ili922x_ops);
+        if (IS_ERR(lcd)) {
+                dev_err(&spi->dev, "cannot register LCD\n");
+                return PTR_ERR(lcd);
+        }
+
+        ili->ld = lcd;
+        spi_set_drvdata(spi, ili);
+
+        ili922x_lcd_power(ili, FB_BLANK_UNBLANK);
+
+        return 0;
+}
+
+static int ili922x_remove(struct spi_device *spi)
+{
+        struct ili922x *ili = spi_get_drvdata(spi);
+
+        ili922x_poweroff(spi);
+        lcd_device_unregister(ili->ld);
+        return 0;
+}
+
+static struct spi_driver ili922x_driver = {
+        .driver = {
+                .name = "ili922x",
+                .owner = THIS_MODULE,
+        },
+        .probe = ili922x_probe,
+        .remove = ili922x_remove,
+};
+
+module_spi_driver(ili922x_driver);
+
+MODULE_AUTHOR("Stefano Babic <sbabic@denx.de>");
+MODULE_DESCRIPTION("ILI9221/9222 LCD driver");
+MODULE_LICENSE("GPL");
+MODULE_PARM_DESC(ili922x_id, "set controller identifier (default=1)");
+MODULE_PARM_DESC(tx_invert, "invert bytes before sending");
diff --git a/drivers/video/backlight/ili9320.c b/drivers/video/backlight/ili9320.c
index 1235bf9defc4..f8be90c5dedc 100644
--- a/drivers/video/backlight/ili9320.c
+++ b/drivers/video/backlight/ili9320.c
@@ -231,7 +231,7 @@ int ili9320_probe_spi(struct spi_device *spi,
         ili->power = FB_BLANK_POWERDOWN;
         ili->platdata = cfg;
 
-        dev_set_drvdata(&spi->dev, ili);
+        spi_set_drvdata(spi, ili);
 
         ili9320_setup_spi(ili, spi);
 
@@ -270,27 +270,21 @@ int ili9320_remove(struct ili9320 *ili)
 }
 EXPORT_SYMBOL_GPL(ili9320_remove);
 
-#ifdef CONFIG_PM
-int ili9320_suspend(struct ili9320 *lcd, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+int ili9320_suspend(struct ili9320 *lcd)
 {
         int ret;
 
-        dev_dbg(lcd->dev, "%s: event %d\n", __func__, state.event);
+        ret = ili9320_power(lcd, FB_BLANK_POWERDOWN);
 
-        if (state.event == PM_EVENT_SUSPEND) {
-                ret = ili9320_power(lcd, FB_BLANK_POWERDOWN);
-
-                if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) {
-                        ili9320_write(lcd, ILI9320_POWER1, lcd->power1 |
-                                      ILI9320_POWER1_SLP |
-                                      ILI9320_POWER1_DSTB);
-                        lcd->initialised = 0;
-                }
-
-                return ret;
+        if (lcd->platdata->suspend == ILI9320_SUSPEND_DEEP) {
+                ili9320_write(lcd, ILI9320_POWER1, lcd->power1 |
+                              ILI9320_POWER1_SLP |
+                              ILI9320_POWER1_DSTB);
+                lcd->initialised = 0;
         }
 
-        return 0;
+        return ret;
 }
 EXPORT_SYMBOL_GPL(ili9320_suspend);
 
diff --git a/drivers/video/backlight/ili9320.h b/drivers/video/backlight/ili9320.h
index e0db738f7bb9..42329e7aa9a8 100644
--- a/drivers/video/backlight/ili9320.h
+++ b/drivers/video/backlight/ili9320.h
@@ -76,5 +76,5 @@ extern void ili9320_shutdown(struct ili9320 *lcd);
 
 /* PM */
 
-extern int ili9320_suspend(struct ili9320 *lcd, pm_message_t state);
+extern int ili9320_suspend(struct ili9320 *lcd);
 extern int ili9320_resume(struct ili9320 *lcd);
diff --git a/drivers/video/backlight/jornada720_bl.c b/drivers/video/backlight/jornada720_bl.c
index fef6ce4fad71..3ccb89340f22 100644
--- a/drivers/video/backlight/jornada720_bl.c
+++ b/drivers/video/backlight/jornada720_bl.c
@@ -9,8 +9,6 @@
  *
  */
 
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
 #include <linux/backlight.h>
 #include <linux/device.h>
 #include <linux/fb.h>
@@ -40,11 +38,13 @@ static int jornada_bl_get_brightness(struct backlight_device *bd)
         ret = jornada_ssp_byte(GETBRIGHTNESS);
 
         if (jornada_ssp_byte(GETBRIGHTNESS) != TXDUMMY) {
-                pr_err("get brightness timeout\n");
+                dev_err(&bd->dev, "get brightness timeout\n");
                 jornada_ssp_end();
                 return -ETIMEDOUT;
-        } else /* exchange txdummy for value */
+        } else {
+                /* exchange txdummy for value */
                 ret = jornada_ssp_byte(TXDUMMY);
+        }
 
         jornada_ssp_end();
 
@@ -61,7 +61,7 @@ static int jornada_bl_update_status(struct backlight_device *bd)
         if ((bd->props.power != FB_BLANK_UNBLANK) || (bd->props.fb_blank != FB_BLANK_UNBLANK)) {
                 ret = jornada_ssp_byte(BRIGHTNESSOFF);
                 if (ret != TXDUMMY) {
-                        pr_info("brightness off timeout\n");
+                        dev_info(&bd->dev, "brightness off timeout\n");
                         /* turn off backlight */
                         PPSR &= ~PPC_LDD1;
                         PPDR |= PPC_LDD1;
@@ -72,7 +72,7 @@ static int jornada_bl_update_status(struct backlight_device *bd)
 
                 /* send command to our mcu */
                 if (jornada_ssp_byte(SETBRIGHTNESS) != TXDUMMY) {
-                        pr_info("failed to set brightness\n");
+                        dev_info(&bd->dev, "failed to set brightness\n");
                         ret = -ETIMEDOUT;
                         goto out;
                 }
@@ -86,7 +86,7 @@ static int jornada_bl_update_status(struct backlight_device *bd)
                  */
                 if (jornada_ssp_byte(BL_MAX_BRIGHT - bd->props.brightness)
                         != TXDUMMY) {
-                        pr_err("set brightness failed\n");
+                        dev_err(&bd->dev, "set brightness failed\n");
                         ret = -ETIMEDOUT;
                 }
 
@@ -120,7 +120,7 @@ static int jornada_bl_probe(struct platform_device *pdev)
 
         if (IS_ERR(bd)) {
                 ret = PTR_ERR(bd);
-                pr_err("failed to register device, err=%x\n", ret);
+                dev_err(&pdev->dev, "failed to register device, err=%x\n", ret);
                 return ret;
         }
 
@@ -134,7 +134,7 @@ static int jornada_bl_probe(struct platform_device *pdev)
         jornada_bl_update_status(bd);
 
         platform_set_drvdata(pdev, bd);
-        pr_info("HP Jornada 700 series backlight driver\n");
+        dev_info(&pdev->dev, "HP Jornada 700 series backlight driver\n");
 
         return 0;
 }
diff --git a/drivers/video/backlight/jornada720_lcd.c b/drivers/video/backlight/jornada720_lcd.c
index 635b30523fd5..b061413f1a65 100644
--- a/drivers/video/backlight/jornada720_lcd.c
+++ b/drivers/video/backlight/jornada720_lcd.c
@@ -9,8 +9,6 @@
  *
  */
 
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
 #include <linux/device.h>
 #include <linux/fb.h>
 #include <linux/kernel.h>
@@ -27,7 +25,7 @@
 #define LCD_MAX_CONTRAST        0xff
 #define LCD_DEF_CONTRAST        0x80
 
-static int jornada_lcd_get_power(struct lcd_device *dev)
+static int jornada_lcd_get_power(struct lcd_device *ld)
 {
         /* LDD2 in PPC = LCD POWER */
         if (PPSR & PPC_LDD2)
@@ -36,17 +34,17 @@ static int jornada_lcd_get_power(struct lcd_device *dev)
                 return FB_BLANK_POWERDOWN;      /* PW OFF */
 }
 
-static int jornada_lcd_get_contrast(struct lcd_device *dev)
+static int jornada_lcd_get_contrast(struct lcd_device *ld)
 {
         int ret;
 
-        if (jornada_lcd_get_power(dev) != FB_BLANK_UNBLANK)
+        if (jornada_lcd_get_power(ld) != FB_BLANK_UNBLANK)
                 return 0;
 
         jornada_ssp_start();
 
         if (jornada_ssp_byte(GETCONTRAST) != TXDUMMY) {
-                pr_err("get contrast failed\n");
+                dev_err(&ld->dev, "get contrast failed\n");
                 jornada_ssp_end();
                 return -ETIMEDOUT;
         } else {
@@ -56,7 +54,7 @@ static int jornada_lcd_get_contrast(struct lcd_device *dev)
         }
 }
 
-static int jornada_lcd_set_contrast(struct lcd_device *dev, int value)
+static int jornada_lcd_set_contrast(struct lcd_device *ld, int value)
 {
         int ret;
 
@@ -67,7 +65,7 @@ static int jornada_lcd_set_contrast(struct lcd_device *dev, int value)
 
         /* push the new value */
         if (jornada_ssp_byte(value) != TXDUMMY) {
-                pr_err("set contrast failed\n");
+                dev_err(&ld->dev, "set contrast failed\n");
                 jornada_ssp_end();
                 return -ETIMEDOUT;
         }
@@ -78,13 +76,14 @@ static int jornada_lcd_set_contrast(struct lcd_device *dev, int value)
         return 0;
 }
 
-static int jornada_lcd_set_power(struct lcd_device *dev, int power)
+static int jornada_lcd_set_power(struct lcd_device *ld, int power)
 {
         if (power != FB_BLANK_UNBLANK) {
                 PPSR &= ~PPC_LDD2;
                 PPDR |= PPC_LDD2;
-        } else
+        } else {
                 PPSR |= PPC_LDD2;
+        }
 
         return 0;
 }
@@ -105,7 +104,7 @@ static int jornada_lcd_probe(struct platform_device *pdev)
 
         if (IS_ERR(lcd_device)) {
                 ret = PTR_ERR(lcd_device);
-                pr_err("failed to register device\n");
+                dev_err(&pdev->dev, "failed to register device\n");
                 return ret;
         }
 
diff --git a/drivers/video/backlight/kb3886_bl.c b/drivers/video/backlight/kb3886_bl.c
index 6c5ed6b242cc..bca6ccc74dfb 100644
--- a/drivers/video/backlight/kb3886_bl.c
+++ b/drivers/video/backlight/kb3886_bl.c
@@ -106,29 +106,28 @@ static int kb3886bl_send_intensity(struct backlight_device *bd)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int kb3886bl_suspend(struct platform_device *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int kb3886bl_suspend(struct device *dev)
 {
-        struct backlight_device *bd = platform_get_drvdata(pdev);
+        struct backlight_device *bd = dev_get_drvdata(dev);
 
         kb3886bl_flags |= KB3886BL_SUSPENDED;
         backlight_update_status(bd);
         return 0;
 }
 
-static int kb3886bl_resume(struct platform_device *pdev)
+static int kb3886bl_resume(struct device *dev)
 {
-        struct backlight_device *bd = platform_get_drvdata(pdev);
+        struct backlight_device *bd = dev_get_drvdata(dev);
 
         kb3886bl_flags &= ~KB3886BL_SUSPENDED;
         backlight_update_status(bd);
         return 0;
 }
-#else
-#define kb3886bl_suspend        NULL
-#define kb3886bl_resume         NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(kb3886bl_pm_ops, kb3886bl_suspend, kb3886bl_resume);
+
 static int kb3886bl_get_intensity(struct backlight_device *bd)
 {
         return kb3886bl_intensity;
@@ -179,10 +178,9 @@ static int kb3886bl_remove(struct platform_device *pdev)
 static struct platform_driver kb3886bl_driver = {
         .probe          = kb3886bl_probe,
         .remove         = kb3886bl_remove,
-        .suspend        = kb3886bl_suspend,
-        .resume         = kb3886bl_resume,
         .driver         = {
                 .name   = "kb3886-bl",
+                .pm     = &kb3886bl_pm_ops,
         },
 };
 
diff --git a/drivers/video/backlight/l4f00242t03.c b/drivers/video/backlight/l4f00242t03.c
index fb6155771326..a35a38c709cf 100644
--- a/drivers/video/backlight/l4f00242t03.c
+++ b/drivers/video/backlight/l4f00242t03.c
@@ -51,14 +51,33 @@ static void l4f00242t03_lcd_init(struct spi_device *spi)
         struct l4f00242t03_pdata *pdata = spi->dev.platform_data;
         struct l4f00242t03_priv *priv = spi_get_drvdata(spi);
         const u16 cmd[] = { 0x36, param(0), 0x3A, param(0x60) };
+        int ret;
 
         dev_dbg(&spi->dev, "initializing LCD\n");
 
-        regulator_set_voltage(priv->io_reg, 1800000, 1800000);
-        regulator_enable(priv->io_reg);
+        ret = regulator_set_voltage(priv->io_reg, 1800000, 1800000);
+        if (ret) {
+                dev_err(&spi->dev, "failed to set the IO regulator voltage.\n");
+                return;
+        }
+        ret = regulator_enable(priv->io_reg);
+        if (ret) {
+                dev_err(&spi->dev, "failed to enable the IO regulator.\n");
+                return;
+        }
 
-        regulator_set_voltage(priv->core_reg, 2800000, 2800000);
-        regulator_enable(priv->core_reg);
+        ret = regulator_set_voltage(priv->core_reg, 2800000, 2800000);
+        if (ret) {
+                dev_err(&spi->dev, "failed to set the core regulator voltage.\n");
+                regulator_disable(priv->io_reg);
+                return;
+        }
+        ret = regulator_enable(priv->core_reg);
+        if (ret) {
+                dev_err(&spi->dev, "failed to enable the core regulator.\n");
+                regulator_disable(priv->io_reg);
+                return;
+        }
 
         l4f00242t03_reset(pdata->reset_gpio);
 
diff --git a/drivers/video/backlight/ld9040.c b/drivers/video/backlight/ld9040.c
index 1b642f5f381a..1e0a3093ce50 100644
--- a/drivers/video/backlight/ld9040.c
+++ b/drivers/video/backlight/ld9040.c
@@ -775,12 +775,12 @@ static int ld9040_remove(struct spi_device *spi)
         return 0;
 }
 
-#if defined(CONFIG_PM)
-static int ld9040_suspend(struct spi_device *spi, pm_message_t mesg)
+#ifdef CONFIG_PM_SLEEP
+static int ld9040_suspend(struct device *dev)
 {
-        struct ld9040 *lcd = spi_get_drvdata(spi);
+        struct ld9040 *lcd = dev_get_drvdata(dev);
 
-        dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
+        dev_dbg(dev, "lcd->power = %d\n", lcd->power);
 
         /*
          * when lcd panel is suspend, lcd panel becomes off
@@ -789,19 +789,18 @@ static int ld9040_suspend(struct spi_device *spi, pm_message_t mesg)
         return ld9040_power(lcd, FB_BLANK_POWERDOWN);
 }
 
-static int ld9040_resume(struct spi_device *spi)
+static int ld9040_resume(struct device *dev)
 {
-        struct ld9040 *lcd = spi_get_drvdata(spi);
+        struct ld9040 *lcd = dev_get_drvdata(dev);
 
         lcd->power = FB_BLANK_POWERDOWN;
 
         return ld9040_power(lcd, FB_BLANK_UNBLANK);
 }
-#else
-#define ld9040_suspend          NULL
-#define ld9040_resume           NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(ld9040_pm_ops, ld9040_suspend, ld9040_resume);
+
 /* Power down all displays on reboot, poweroff or halt. */
 static void ld9040_shutdown(struct spi_device *spi)
 {
@@ -814,12 +813,11 @@ static struct spi_driver ld9040_driver = {
         .driver = {
                 .name   = "ld9040",
                 .owner  = THIS_MODULE,
+                .pm     = &ld9040_pm_ops,
         },
         .probe          = ld9040_probe,
         .remove         = ld9040_remove,
         .shutdown       = ld9040_shutdown,
-        .suspend        = ld9040_suspend,
-        .resume         = ld9040_resume,
 };
 
 module_spi_driver(ld9040_driver);
diff --git a/drivers/video/backlight/lm3533_bl.c b/drivers/video/backlight/lm3533_bl.c
index 5d18d4d7f470..1d1dbfb789e3 100644
--- a/drivers/video/backlight/lm3533_bl.c
+++ b/drivers/video/backlight/lm3533_bl.c
@@ -368,29 +368,28 @@ static int lm3533_bl_remove(struct platform_device *pdev)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int lm3533_bl_suspend(struct platform_device *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int lm3533_bl_suspend(struct device *dev)
 {
-        struct lm3533_bl *bl = platform_get_drvdata(pdev);
+        struct lm3533_bl *bl = dev_get_drvdata(dev);
 
-        dev_dbg(&pdev->dev, "%s\n", __func__);
+        dev_dbg(dev, "%s\n", __func__);
 
         return lm3533_ctrlbank_disable(&bl->cb);
 }
 
-static int lm3533_bl_resume(struct platform_device *pdev)
+static int lm3533_bl_resume(struct device *dev)
 {
-        struct lm3533_bl *bl = platform_get_drvdata(pdev);
+        struct lm3533_bl *bl = dev_get_drvdata(dev);
 
-        dev_dbg(&pdev->dev, "%s\n", __func__);
+        dev_dbg(dev, "%s\n", __func__);
 
         return lm3533_ctrlbank_enable(&bl->cb);
 }
-#else
-#define lm3533_bl_suspend       NULL
-#define lm3533_bl_resume        NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(lm3533_bl_pm_ops, lm3533_bl_suspend, lm3533_bl_resume);
+
 static void lm3533_bl_shutdown(struct platform_device *pdev)
 {
         struct lm3533_bl *bl = platform_get_drvdata(pdev);
@@ -404,12 +403,11 @@ static struct platform_driver lm3533_bl_driver = {
         .driver = {
                 .name   = "lm3533-backlight",
                 .owner  = THIS_MODULE,
+                .pm     = &lm3533_bl_pm_ops,
         },
         .probe          = lm3533_bl_probe,
         .remove         = lm3533_bl_remove,
         .shutdown       = lm3533_bl_shutdown,
-        .suspend        = lm3533_bl_suspend,
-        .resume         = lm3533_bl_resume,
 };
 module_platform_driver(lm3533_bl_driver);
 
diff --git a/drivers/video/backlight/lms501kf03.c b/drivers/video/backlight/lms501kf03.c
index b43882abefaf..cf01b9ac8131 100644
--- a/drivers/video/backlight/lms501kf03.c
+++ b/drivers/video/backlight/lms501kf03.c
@@ -387,13 +387,12 @@ static int lms501kf03_remove(struct spi_device *spi)
         return 0;
 }
 
-#if defined(CONFIG_PM)
-
-static int lms501kf03_suspend(struct spi_device *spi, pm_message_t mesg)
+#ifdef CONFIG_PM_SLEEP
+static int lms501kf03_suspend(struct device *dev)
 {
-        struct lms501kf03 *lcd = spi_get_drvdata(spi);
+        struct lms501kf03 *lcd = dev_get_drvdata(dev);
 
-        dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
+        dev_dbg(dev, "lcd->power = %d\n", lcd->power);
 
         /*
          * when lcd panel is suspend, lcd panel becomes off
@@ -402,19 +401,19 @@ static int lms501kf03_suspend(struct spi_device *spi, pm_message_t mesg)
         return lms501kf03_power(lcd, FB_BLANK_POWERDOWN);
 }
 
-static int lms501kf03_resume(struct spi_device *spi)
+static int lms501kf03_resume(struct device *dev)
 {
-        struct lms501kf03 *lcd = spi_get_drvdata(spi);
+        struct lms501kf03 *lcd = dev_get_drvdata(dev);
 
         lcd->power = FB_BLANK_POWERDOWN;
 
         return lms501kf03_power(lcd, FB_BLANK_UNBLANK);
 }
-#else
-#define lms501kf03_suspend      NULL
-#define lms501kf03_resume       NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(lms501kf03_pm_ops, lms501kf03_suspend,
+                        lms501kf03_resume);
+
 static void lms501kf03_shutdown(struct spi_device *spi)
 {
         struct lms501kf03 *lcd = spi_get_drvdata(spi);
@@ -426,12 +425,11 @@ static struct spi_driver lms501kf03_driver = {
         .driver = {
                 .name   = "lms501kf03",
                 .owner  = THIS_MODULE,
+                .pm     = &lms501kf03_pm_ops,
         },
         .probe          = lms501kf03_probe,
         .remove         = lms501kf03_remove,
         .shutdown       = lms501kf03_shutdown,
-        .suspend        = lms501kf03_suspend,
-        .resume         = lms501kf03_resume,
 };
 
 module_spi_driver(lms501kf03_driver);
diff --git a/drivers/video/backlight/locomolcd.c b/drivers/video/backlight/locomolcd.c
index 146fea8aa431..6c3ec4259a60 100644
--- a/drivers/video/backlight/locomolcd.c
+++ b/drivers/video/backlight/locomolcd.c
@@ -157,25 +157,24 @@ static const struct backlight_ops locomobl_data = {
         .update_status  = locomolcd_set_intensity,
 };
 
-#ifdef CONFIG_PM
-static int locomolcd_suspend(struct locomo_dev *dev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int locomolcd_suspend(struct device *dev)
 {
         locomolcd_flags |= LOCOMOLCD_SUSPENDED;
         locomolcd_set_intensity(locomolcd_bl_device);
         return 0;
 }
 
-static int locomolcd_resume(struct locomo_dev *dev)
+static int locomolcd_resume(struct device *dev)
 {
         locomolcd_flags &= ~LOCOMOLCD_SUSPENDED;
         locomolcd_set_intensity(locomolcd_bl_device);
         return 0;
 }
-#else
-#define locomolcd_suspend       NULL
-#define locomolcd_resume        NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(locomolcd_pm_ops, locomolcd_suspend, locomolcd_resume);
+
 static int locomolcd_probe(struct locomo_dev *ldev)
 {
         struct backlight_properties props;
@@ -230,13 +229,12 @@ static int locomolcd_remove(struct locomo_dev *dev)
 
 static struct locomo_driver poodle_lcd_driver = {
         .drv = {
-                .name = "locomo-backlight",
+                .name   = "locomo-backlight",
+                .pm     = &locomolcd_pm_ops,
         },
         .devid  = LOCOMO_DEVID_BACKLIGHT,
         .probe  = locomolcd_probe,
         .remove = locomolcd_remove,
-        .suspend = locomolcd_suspend,
-        .resume = locomolcd_resume,
 };
 
 static int __init locomolcd_init(void)
diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c
index 7ae9ae6f4655..a0e1e02bdc2e 100644
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c
@@ -14,6 +14,7 @@
 #include <linux/i2c.h>
 #include <linux/backlight.h>
 #include <linux/err.h>
+#include <linux/of.h>
 #include <linux/platform_data/lp855x.h>
 #include <linux/pwm.h>
 
@@ -35,10 +36,14 @@
 #define LP8557_EPROM_START              0x10
 #define LP8557_EPROM_END                0x1E
 
-#define BUF_SIZE                20
 #define DEFAULT_BL_NAME         "lcd-backlight"
 #define MAX_BRIGHTNESS          255
 
+enum lp855x_brightness_ctrl_mode {
+        PWM_BASED = 1,
+        REGISTER_BASED,
+};
+
 struct lp855x;
 
 /*
@@ -58,6 +63,7 @@ struct lp855x_device_config {
 struct lp855x {
         const char *chipname;
         enum lp855x_chip_id chip_id;
+        enum lp855x_brightness_ctrl_mode mode;
         struct lp855x_device_config *cfg;
         struct i2c_client *client;
         struct backlight_device *bl;
@@ -187,7 +193,7 @@ static int lp855x_configure(struct lp855x *lp)
         if (ret)
                 goto err;
 
-        if (pd->load_new_rom_data && pd->size_program) {
+        if (pd->size_program > 0) {
                 for (i = 0; i < pd->size_program; i++) {
                         addr = pd->rom_data[i].addr;
                         val = pd->rom_data[i].val;
@@ -239,18 +245,17 @@ static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br)
 static int lp855x_bl_update_status(struct backlight_device *bl)
 {
         struct lp855x *lp = bl_get_data(bl);
-        enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode;
 
         if (bl->props.state & BL_CORE_SUSPENDED)
                 bl->props.brightness = 0;
 
-        if (mode == PWM_BASED) {
+        if (lp->mode == PWM_BASED) {
                 int br = bl->props.brightness;
                 int max_br = bl->props.max_brightness;
 
                 lp855x_pwm_ctrl(lp, br, max_br);
 
-        } else if (mode == REGISTER_BASED) {
+        } else if (lp->mode == REGISTER_BASED) {
                 u8 val = bl->props.brightness;
                 lp855x_write_byte(lp, lp->cfg->reg_brightness, val);
         }
@@ -274,7 +279,7 @@ static int lp855x_backlight_register(struct lp855x *lp)
         struct backlight_device *bl;
         struct backlight_properties props;
         struct lp855x_platform_data *pdata = lp->pdata;
-        char *name = pdata->name ? : DEFAULT_BL_NAME;
+        const char *name = pdata->name ? : DEFAULT_BL_NAME;
 
         props.type = BACKLIGHT_PLATFORM;
         props.max_brightness = MAX_BRIGHTNESS;
@@ -304,22 +309,21 @@ static ssize_t lp855x_get_chip_id(struct device *dev,
                                 struct device_attribute *attr, char *buf)
 {
         struct lp855x *lp = dev_get_drvdata(dev);
-        return scnprintf(buf, BUF_SIZE, "%s\n", lp->chipname);
+        return scnprintf(buf, PAGE_SIZE, "%s\n", lp->chipname);
 }
 
 static ssize_t lp855x_get_bl_ctl_mode(struct device *dev,
                                      struct device_attribute *attr, char *buf)
 {
         struct lp855x *lp = dev_get_drvdata(dev);
-        enum lp855x_brightness_ctrl_mode mode = lp->pdata->mode;
         char *strmode = NULL;
 
-        if (mode == PWM_BASED)
+        if (lp->mode == PWM_BASED)
                 strmode = "pwm based";
-        else if (mode == REGISTER_BASED)
+        else if (lp->mode == REGISTER_BASED)
                 strmode = "register based";
 
-        return scnprintf(buf, BUF_SIZE, "%s\n", strmode);
+        return scnprintf(buf, PAGE_SIZE, "%s\n", strmode);
 }
 
 static DEVICE_ATTR(chip_id, S_IRUGO, lp855x_get_chip_id, NULL);
@@ -335,16 +339,71 @@ static const struct attribute_group lp855x_attr_group = {
         .attrs = lp855x_attributes,
 };
 
+#ifdef CONFIG_OF
+static int lp855x_parse_dt(struct device *dev, struct device_node *node)
+{
+        struct lp855x_platform_data *pdata;
+        int rom_length;
+
+        if (!node) {
+                dev_err(dev, "no platform data\n");
+                return -EINVAL;
+        }
+
+        pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+        if (!pdata)
+                return -ENOMEM;
+
+        of_property_read_string(node, "bl-name", &pdata->name);
+        of_property_read_u8(node, "dev-ctrl", &pdata->device_control);
+        of_property_read_u8(node, "init-brt", &pdata->initial_brightness);
+        of_property_read_u32(node, "pwm-period", &pdata->period_ns);
+
+        /* Fill ROM platform data if defined */
+        rom_length = of_get_child_count(node);
+        if (rom_length > 0) {
+                struct lp855x_rom_data *rom;
+                struct device_node *child;
+                int i = 0;
+
+                rom = devm_kzalloc(dev, sizeof(*rom) * rom_length, GFP_KERNEL);
+                if (!rom)
+                        return -ENOMEM;
+
+                for_each_child_of_node(node, child) {
+                        of_property_read_u8(child, "rom-addr", &rom[i].addr);
+                        of_property_read_u8(child, "rom-val", &rom[i].val);
+                        i++;
+                }
+
+                pdata->size_program = rom_length;
+                pdata->rom_data = &rom[0];
+        }
+
+        dev->platform_data = pdata;
+
+        return 0;
+}
+#else
+static int lp855x_parse_dt(struct device *dev, struct device_node *node)
+{
+        return -EINVAL;
+}
+#endif
+
 static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 {
         struct lp855x *lp;
         struct lp855x_platform_data *pdata = cl->dev.platform_data;
-        enum lp855x_brightness_ctrl_mode mode;
+        struct device_node *node = cl->dev.of_node;
         int ret;
 
         if (!pdata) {
-                dev_err(&cl->dev, "no platform data supplied\n");
-                return -EINVAL;
+                ret = lp855x_parse_dt(&cl->dev, node);
+                if (ret < 0)
+                        return ret;
+
+                pdata = cl->dev.platform_data;
         }
 
         if (!i2c_check_functionality(cl->adapter, I2C_FUNC_SMBUS_I2C_BLOCK))
@@ -354,7 +413,11 @@ static int lp855x_probe(struct i2c_client *cl, const struct i2c_device_id *id)
         if (!lp)
                 return -ENOMEM;
 
-        mode = pdata->mode;
+        if (pdata->period_ns > 0)
+                lp->mode = PWM_BASED;
+        else
+                lp->mode = REGISTER_BASED;
+
         lp->client = cl;
         lp->dev = &cl->dev;
         lp->pdata = pdata;
@@ -402,6 +465,17 @@ static int lp855x_remove(struct i2c_client *cl)
         return 0;
 }
 
+static const struct of_device_id lp855x_dt_ids[] = {
+        { .compatible = "ti,lp8550", },
+        { .compatible = "ti,lp8551", },
+        { .compatible = "ti,lp8552", },
+        { .compatible = "ti,lp8553", },
+        { .compatible = "ti,lp8556", },
+        { .compatible = "ti,lp8557", },
+        { }
+};
+MODULE_DEVICE_TABLE(of, lp855x_dt_ids);
+
 static const struct i2c_device_id lp855x_ids[] = {
         {"lp8550", LP8550},
         {"lp8551", LP8551},
@@ -416,6 +490,7 @@ MODULE_DEVICE_TABLE(i2c, lp855x_ids);
 static struct i2c_driver lp855x_driver = {
         .driver = {
                    .name = "lp855x",
+                   .of_match_table = of_match_ptr(lp855x_dt_ids),
                    },
         .probe = lp855x_probe,
         .remove = lp855x_remove,
diff --git a/drivers/video/backlight/ltv350qv.c b/drivers/video/backlight/ltv350qv.c
index c0b4b8f2de98..ed1b39268131 100644
--- a/drivers/video/backlight/ltv350qv.c
+++ b/drivers/video/backlight/ltv350qv.c
@@ -271,25 +271,24 @@ static int ltv350qv_remove(struct spi_device *spi)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int ltv350qv_suspend(struct spi_device *spi, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int ltv350qv_suspend(struct device *dev)
 {
-        struct ltv350qv *lcd = spi_get_drvdata(spi);
+        struct ltv350qv *lcd = dev_get_drvdata(dev);
 
         return ltv350qv_power(lcd, FB_BLANK_POWERDOWN);
 }
 
-static int ltv350qv_resume(struct spi_device *spi)
+static int ltv350qv_resume(struct device *dev)
 {
-        struct ltv350qv *lcd = spi_get_drvdata(spi);
+        struct ltv350qv *lcd = dev_get_drvdata(dev);
 
         return ltv350qv_power(lcd, FB_BLANK_UNBLANK);
 }
-#else
-#define ltv350qv_suspend        NULL
-#define ltv350qv_resume         NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(ltv350qv_pm_ops, ltv350qv_suspend, ltv350qv_resume);
+
 /* Power down all displays on reboot, poweroff or halt */
 static void ltv350qv_shutdown(struct spi_device *spi)
 {
@@ -302,13 +301,12 @@ static struct spi_driver ltv350qv_driver = {
         .driver = {
                 .name           = "ltv350qv",
                 .owner          = THIS_MODULE,
+                .pm             = &ltv350qv_pm_ops,
         },
 
         .probe          = ltv350qv_probe,
         .remove         = ltv350qv_remove,
         .shutdown       = ltv350qv_shutdown,
-        .suspend        = ltv350qv_suspend,
-        .resume         = ltv350qv_resume,
 };
 
 module_spi_driver(ltv350qv_driver);
diff --git a/drivers/video/backlight/omap1_bl.c b/drivers/video/backlight/omap1_bl.c
index 627110163067..812e22e35cab 100644
--- a/drivers/video/backlight/omap1_bl.c
+++ b/drivers/video/backlight/omap1_bl.c
@@ -18,8 +18,6 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  */
 
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
@@ -73,27 +71,24 @@ static void omapbl_blank(struct omap_backlight *bl, int mode)
         }
 }
 
-#ifdef CONFIG_PM
-static int omapbl_suspend(struct platform_device *pdev, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int omapbl_suspend(struct device *dev)
 {
-        struct backlight_device *dev = platform_get_drvdata(pdev);
-        struct omap_backlight *bl = bl_get_data(dev);
+        struct backlight_device *bl_dev = dev_get_drvdata(dev);
+        struct omap_backlight *bl = bl_get_data(bl_dev);
 
         omapbl_blank(bl, FB_BLANK_POWERDOWN);
         return 0;
 }
 
-static int omapbl_resume(struct platform_device *pdev)
+static int omapbl_resume(struct device *dev)
 {
-        struct backlight_device *dev = platform_get_drvdata(pdev);
-        struct omap_backlight *bl = bl_get_data(dev);
+        struct backlight_device *bl_dev = dev_get_drvdata(dev);
+        struct omap_backlight *bl = bl_get_data(bl_dev);
 
         omapbl_blank(bl, bl->powermode);
         return 0;
 }
-#else
-#define omapbl_suspend  NULL
-#define omapbl_resume   NULL
 #endif
 
 static int omapbl_set_power(struct backlight_device *dev, int state)
@@ -170,7 +165,7 @@ static int omapbl_probe(struct platform_device *pdev)
         dev->props.brightness = pdata->default_intensity;
         omapbl_update_status(dev);
 
-        pr_info("OMAP LCD backlight initialised\n");
+        dev_info(&pdev->dev, "OMAP LCD backlight initialised\n");
 
         return 0;
 }
@@ -184,13 +179,14 @@ static int omapbl_remove(struct platform_device *pdev)
         return 0;
 }
 
+static SIMPLE_DEV_PM_OPS(omapbl_pm_ops, omapbl_suspend, omapbl_resume);
+
 static struct platform_driver omapbl_driver = {
         .probe          = omapbl_probe,
         .remove         = omapbl_remove,
-        .suspend        = omapbl_suspend,
-        .resume         = omapbl_resume,
         .driver         = {
                 .name   = "omap-bl",
+                .pm     = &omapbl_pm_ops,
         },
 };
 
diff --git a/drivers/video/backlight/platform_lcd.c b/drivers/video/backlight/platform_lcd.c
index 17a6b83f97af..056836706708 100644
--- a/drivers/video/backlight/platform_lcd.c
+++ b/drivers/video/backlight/platform_lcd.c
@@ -86,6 +86,12 @@ static int platform_lcd_probe(struct platform_device *pdev)
                 return -EINVAL;
         }
 
+        if (pdata->probe) {
+                err = pdata->probe(pdata);
+                if (err)
+                        return err;
+        }
+
         plcd = devm_kzalloc(&pdev->dev, sizeof(struct platform_lcd),
                             GFP_KERNEL);
         if (!plcd) {
@@ -121,7 +127,7 @@ static int platform_lcd_remove(struct platform_device *pdev)
         return 0;
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 static int platform_lcd_suspend(struct device *dev)
 {
         struct platform_lcd *plcd = dev_get_drvdata(dev);
@@ -141,10 +147,10 @@ static int platform_lcd_resume(struct device *dev)
 
         return 0;
 }
+#endif
 
 static SIMPLE_DEV_PM_OPS(platform_lcd_pm_ops, platform_lcd_suspend,
                         platform_lcd_resume);
-#endif
 
 #ifdef CONFIG_OF
 static const struct of_device_id platform_lcd_of_match[] = {
@@ -158,9 +164,7 @@ static struct platform_driver platform_lcd_driver = {
         .driver         = {
                 .name   = "platform-lcd",
                 .owner  = THIS_MODULE,
-#ifdef CONFIG_PM
                 .pm     = &platform_lcd_pm_ops,
-#endif
                 .of_match_table = of_match_ptr(platform_lcd_of_match),
         },
         .probe          = platform_lcd_probe,
diff --git a/drivers/video/backlight/s6e63m0.c b/drivers/video/backlight/s6e63m0.c
index 9c2677f0ef7d..b37bb1854bf4 100644
--- a/drivers/video/backlight/s6e63m0.c
+++ b/drivers/video/backlight/s6e63m0.c
@@ -817,12 +817,12 @@ static int s6e63m0_remove(struct spi_device *spi)
         return 0;
 }
 
-#if defined(CONFIG_PM)
-static int s6e63m0_suspend(struct spi_device *spi, pm_message_t mesg)
+#ifdef CONFIG_PM_SLEEP
+static int s6e63m0_suspend(struct device *dev)
 {
-        struct s6e63m0 *lcd = spi_get_drvdata(spi);
+        struct s6e63m0 *lcd = dev_get_drvdata(dev);
 
-        dev_dbg(&spi->dev, "lcd->power = %d\n", lcd->power);
+        dev_dbg(dev, "lcd->power = %d\n", lcd->power);
 
         /*
          * when lcd panel is suspend, lcd panel becomes off
@@ -831,19 +831,18 @@ static int s6e63m0_suspend(struct spi_device *spi, pm_message_t mesg)
         return s6e63m0_power(lcd, FB_BLANK_POWERDOWN);
 }
 
-static int s6e63m0_resume(struct spi_device *spi)
+static int s6e63m0_resume(struct device *dev)
 {
-        struct s6e63m0 *lcd = spi_get_drvdata(spi);
+        struct s6e63m0 *lcd = dev_get_drvdata(dev);
 
         lcd->power = FB_BLANK_POWERDOWN;
 
         return s6e63m0_power(lcd, FB_BLANK_UNBLANK);
 }
-#else
-#define s6e63m0_suspend         NULL
-#define s6e63m0_resume          NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(s6e63m0_pm_ops, s6e63m0_suspend, s6e63m0_resume);
+
 /* Power down all displays on reboot, poweroff or halt. */
 static void s6e63m0_shutdown(struct spi_device *spi)
 {
@@ -856,12 +855,11 @@ static struct spi_driver s6e63m0_driver = {
         .driver = {
                 .name   = "s6e63m0",
                 .owner  = THIS_MODULE,
+                .pm     = &s6e63m0_pm_ops,
         },
         .probe          = s6e63m0_probe,
         .remove         = s6e63m0_remove,
         .shutdown       = s6e63m0_shutdown,
-        .suspend        = s6e63m0_suspend,
-        .resume         = s6e63m0_resume,
 };
 
 module_spi_driver(s6e63m0_driver);
diff --git a/drivers/video/backlight/tdo24m.c b/drivers/video/backlight/tdo24m.c
index 00162085eec0..18cdf466d50a 100644
--- a/drivers/video/backlight/tdo24m.c
+++ b/drivers/video/backlight/tdo24m.c
@@ -412,25 +412,24 @@ static int tdo24m_remove(struct spi_device *spi)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int tdo24m_suspend(struct spi_device *spi, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int tdo24m_suspend(struct device *dev)
 {
-        struct tdo24m *lcd = spi_get_drvdata(spi);
+        struct tdo24m *lcd = dev_get_drvdata(dev);
 
         return tdo24m_power(lcd, FB_BLANK_POWERDOWN);
 }
 
-static int tdo24m_resume(struct spi_device *spi)
+static int tdo24m_resume(struct device *dev)
 {
-        struct tdo24m *lcd = spi_get_drvdata(spi);
+        struct tdo24m *lcd = dev_get_drvdata(dev);
 
         return tdo24m_power(lcd, FB_BLANK_UNBLANK);
 }
-#else
-#define tdo24m_suspend  NULL
-#define tdo24m_resume   NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(tdo24m_pm_ops, tdo24m_suspend, tdo24m_resume);
+
 /* Power down all displays on reboot, poweroff or halt */
 static void tdo24m_shutdown(struct spi_device *spi)
 {
@@ -443,12 +442,11 @@ static struct spi_driver tdo24m_driver = {
         .driver = {
                 .name           = "tdo24m",
                 .owner          = THIS_MODULE,
+                .pm             = &tdo24m_pm_ops,
         },
         .probe          = tdo24m_probe,
         .remove         = tdo24m_remove,
         .shutdown       = tdo24m_shutdown,
-        .suspend        = tdo24m_suspend,
-        .resume         = tdo24m_resume,
 };
 
 module_spi_driver(tdo24m_driver);
diff --git a/drivers/video/backlight/tosa_bl.c b/drivers/video/backlight/tosa_bl.c
index 2326fa810c59..9df66ac68b34 100644
--- a/drivers/video/backlight/tosa_bl.c
+++ b/drivers/video/backlight/tosa_bl.c
@@ -134,28 +134,27 @@ static int tosa_bl_remove(struct i2c_client *client)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int tosa_bl_suspend(struct i2c_client *client, pm_message_t pm)
+#ifdef CONFIG_PM_SLEEP
+static int tosa_bl_suspend(struct device *dev)
 {
-        struct tosa_bl_data *data = i2c_get_clientdata(client);
+        struct tosa_bl_data *data = dev_get_drvdata(dev);
 
         tosa_bl_set_backlight(data, 0);
 
         return 0;
 }
 
-static int tosa_bl_resume(struct i2c_client *client)
+static int tosa_bl_resume(struct device *dev)
 {
-        struct tosa_bl_data *data = i2c_get_clientdata(client);
+        struct tosa_bl_data *data = dev_get_drvdata(dev);
 
         backlight_update_status(data->bl);
         return 0;
 }
-#else
-#define tosa_bl_suspend NULL
-#define tosa_bl_resume NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(tosa_bl_pm_ops, tosa_bl_suspend, tosa_bl_resume);
+
 static const struct i2c_device_id tosa_bl_id[] = {
         { "tosa-bl", 0 },
         { },
@@ -165,11 +164,10 @@ static struct i2c_driver tosa_bl_driver = {
         .driver = {
                 .name           = "tosa-bl",
                 .owner          = THIS_MODULE,
+                .pm             = &tosa_bl_pm_ops,
         },
         .probe          = tosa_bl_probe,
         .remove         = tosa_bl_remove,
-        .suspend        = tosa_bl_suspend,
-        .resume         = tosa_bl_resume,
         .id_table       = tosa_bl_id,
 };
 
diff --git a/drivers/video/backlight/tosa_lcd.c b/drivers/video/backlight/tosa_lcd.c
index 666fe2593ea4..bf081573e5b5 100644
--- a/drivers/video/backlight/tosa_lcd.c
+++ b/drivers/video/backlight/tosa_lcd.c
@@ -240,19 +240,19 @@ static int tosa_lcd_remove(struct spi_device *spi)
         return 0;
 }
 
-#ifdef CONFIG_PM
-static int tosa_lcd_suspend(struct spi_device *spi, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int tosa_lcd_suspend(struct device *dev)
 {
-        struct tosa_lcd_data *data = spi_get_drvdata(spi);
+        struct tosa_lcd_data *data = dev_get_drvdata(dev);
 
         tosa_lcd_tg_off(data);
 
         return 0;
 }
 
-static int tosa_lcd_resume(struct spi_device *spi)
+static int tosa_lcd_resume(struct device *dev)
 {
-        struct tosa_lcd_data *data = spi_get_drvdata(spi);
+        struct tosa_lcd_data *data = dev_get_drvdata(dev);
 
         tosa_lcd_tg_init(data);
         if (POWER_IS_ON(data->lcd_power))
@@ -262,20 +262,18 @@ static int tosa_lcd_resume(struct spi_device *spi)
 
         return 0;
 }
-#else
-#define tosa_lcd_suspend        NULL
-#define tosa_lcd_resume NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(tosa_lcd_pm_ops, tosa_lcd_suspend, tosa_lcd_resume);
+
 static struct spi_driver tosa_lcd_driver = {
         .driver = {
                 .name           = "tosa-lcd",
                 .owner          = THIS_MODULE,
+                .pm             = &tosa_lcd_pm_ops,
         },
         .probe          = tosa_lcd_probe,
         .remove         = tosa_lcd_remove,
-        .suspend        = tosa_lcd_suspend,
-        .resume         = tosa_lcd_resume,
 };
 
 module_spi_driver(tosa_lcd_driver);
diff --git a/drivers/video/backlight/tps65217_bl.c b/drivers/video/backlight/tps65217_bl.c
index 70881633b45a..05782312aeb3 100644
--- a/drivers/video/backlight/tps65217_bl.c
+++ b/drivers/video/backlight/tps65217_bl.c
@@ -245,6 +245,18 @@ tps65217_bl_parse_dt(struct platform_device *pdev)
                 }
         }
 
+        if (!of_property_read_u32(node, "default-brightness", &val)) {
+                if (val < 0 ||
+                        val > 100) {
+                        dev_err(&pdev->dev,
+                                "invalid 'default-brightness' value in the device tree\n");
+                        err = ERR_PTR(-EINVAL);
+                        goto err;
+                }
+
+                pdata->dft_brightness = val;
+        }
+
         of_node_put(node);
 
         return pdata;
@@ -311,7 +323,8 @@ static int tps65217_bl_probe(struct platform_device *pdev)
                 return PTR_ERR(tps65217_bl->bl);
         }
 
-        tps65217_bl->bl->props.brightness = 0;
+        tps65217_bl->bl->props.brightness = pdata->dft_brightness;
+        backlight_update_status(tps65217_bl->bl);
         platform_set_drvdata(pdev, tps65217_bl);
 
         return 0;
diff --git a/drivers/video/backlight/vgg2432a4.c b/drivers/video/backlight/vgg2432a4.c
index 84d582f591dc..d538947a67d3 100644
--- a/drivers/video/backlight/vgg2432a4.c
+++ b/drivers/video/backlight/vgg2432a4.c
@@ -205,18 +205,15 @@ static int vgg2432a4_lcd_init(struct ili9320 *lcd,
         return ret;
 }
 
-#ifdef CONFIG_PM
-static int vgg2432a4_suspend(struct spi_device *spi, pm_message_t state)
+#ifdef CONFIG_PM_SLEEP
+static int vgg2432a4_suspend(struct device *dev)
 {
-        return ili9320_suspend(spi_get_drvdata(spi), state);
+        return ili9320_suspend(dev_get_drvdata(dev));
 }
-static int vgg2432a4_resume(struct spi_device *spi)
+static int vgg2432a4_resume(struct device *dev)
 {
-        return ili9320_resume(spi_get_drvdata(spi));
+        return ili9320_resume(dev_get_drvdata(dev));
 }
-#else
-#define vgg2432a4_suspend       NULL
-#define vgg2432a4_resume        NULL
 #endif
 
 static struct ili9320_client vgg2432a4_client = {
@@ -249,16 +246,17 @@ static void vgg2432a4_shutdown(struct spi_device *spi)
         ili9320_shutdown(spi_get_drvdata(spi));
 }
 
+static SIMPLE_DEV_PM_OPS(vgg2432a4_pm_ops, vgg2432a4_suspend, vgg2432a4_resume);
+
 static struct spi_driver vgg2432a4_driver = {
         .driver = {
                 .name           = "VGG2432A4",
                 .owner          = THIS_MODULE,
+                .pm             = &vgg2432a4_pm_ops,
         },
         .probe          = vgg2432a4_probe,
         .remove         = vgg2432a4_remove,
         .shutdown       = vgg2432a4_shutdown,
-        .suspend        = vgg2432a4_suspend,
-        .resume         = vgg2432a4_resume,
 };
 
 module_spi_driver(vgg2432a4_driver);
diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c
index d4284458377e..e328a61b64ba 100644
--- a/drivers/video/uvesafb.c
+++ b/drivers/video/uvesafb.c
@@ -166,7 +166,7 @@ static int uvesafb_exec(struct uvesafb_ktask *task)
         memcpy(&m->id, &uvesafb_cn_id, sizeof(m->id));
         m->seq = seq;
         m->len = len;
-        m->ack = random32();
+        m->ack = prandom_u32();
 
         /* uvesafb_task structure */
         memcpy(m + 1, &task->t, sizeof(task->t));