17 files changed, 555 insertions, 106 deletions

diff --git a/drivers/rtc/Kconfig b/drivers/rtc/Kconfig
index 08cbdb900a18..fabc99a75c65 100644
--- a/drivers/rtc/Kconfig
+++ b/drivers/rtc/Kconfig
@@ -135,6 +135,16 @@ config RTC_DRV_88PM860X
           This driver can also be built as a module. If so, the module
           will be called rtc-88pm860x.
 
+config RTC_DRV_88PM80X
+        tristate "Marvell 88PM80x"
+        depends on RTC_CLASS && I2C && MFD_88PM800
+        help
+          If you say yes here you get support for RTC function in Marvell
+          88PM80x chips.
+
+          This driver can also be built as a module. If so, the module
+          will be called rtc-88pm80x.
+
 config RTC_DRV_DS1307
         tristate "Dallas/Maxim DS1307/37/38/39/40, ST M41T00, EPSON RX-8025"
         help
@@ -694,6 +704,7 @@ config RTC_DRV_AB3100
 config RTC_DRV_AB8500
         tristate "ST-Ericsson AB8500 RTC"
         depends on AB8500_CORE
+        select RTC_INTF_DEV_UIE_EMUL
         help
           Select this to enable the ST-Ericsson AB8500 power management IC RTC
           support. This chip contains a battery- and capacitor-backed RTC.
diff --git a/drivers/rtc/Makefile b/drivers/rtc/Makefile
index 2973921c30d8..0d5b2b66f90d 100644
--- a/drivers/rtc/Makefile
+++ b/drivers/rtc/Makefile
@@ -16,6 +16,7 @@ rtc-core-$(CONFIG_RTC_INTF_SYSFS) += rtc-sysfs.o
 # Keep the list ordered.
 
 obj-$(CONFIG_RTC_DRV_88PM860X)  += rtc-88pm860x.o
+obj-$(CONFIG_RTC_DRV_88PM80X)   += rtc-88pm80x.o
 obj-$(CONFIG_RTC_DRV_AB3100)    += rtc-ab3100.o
 obj-$(CONFIG_RTC_DRV_AB8500)    += rtc-ab8500.o
 obj-$(CONFIG_RTC_DRV_AT32AP700X)+= rtc-at32ap700x.o
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index eb415bd76494..9592b936b71b 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -582,6 +582,7 @@ enum hrtimer_restart rtc_pie_update_irq(struct hrtimer *timer)
 void rtc_update_irq(struct rtc_device *rtc,
                 unsigned long num, unsigned long events)
 {
+        pm_stay_awake(rtc->dev.parent);
         schedule_work(&rtc->irqwork);
 }
 EXPORT_SYMBOL_GPL(rtc_update_irq);
@@ -844,6 +845,7 @@ void rtc_timer_do_work(struct work_struct *work)
 
         mutex_lock(&rtc->ops_lock);
 again:
+        pm_relax(rtc->dev.parent);
         __rtc_read_time(rtc, &tm);
         now = rtc_tm_to_ktime(tm);
         while ((next = timerqueue_getnext(&rtc->timerqueue))) {
diff --git a/drivers/rtc/rtc-88pm80x.c b/drivers/rtc/rtc-88pm80x.c
new file mode 100644
index 000000000000..6367984e0565
--- /dev/null
+++ b/drivers/rtc/rtc-88pm80x.c
@@ -0,0 +1,369 @@
+/*
+ * Real Time Clock driver for Marvell 88PM80x PMIC
+ *
+ * Copyright (c) 2012 Marvell International Ltd.
+ *  Wenzeng Chen<wzch@marvell.com>
+ *  Qiao Zhou <zhouqiao@marvell.com>
+ *
+ * This file is subject to the terms and conditions of the GNU General
+ * Public License. See the file "COPYING" in the main directory of this
+ * archive for more details.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/88pm80x.h>
+#include <linux/rtc.h>
+
+#define PM800_RTC_COUNTER1              (0xD1)
+#define PM800_RTC_COUNTER2              (0xD2)
+#define PM800_RTC_COUNTER3              (0xD3)
+#define PM800_RTC_COUNTER4              (0xD4)
+#define PM800_RTC_EXPIRE1_1             (0xD5)
+#define PM800_RTC_EXPIRE1_2             (0xD6)
+#define PM800_RTC_EXPIRE1_3             (0xD7)
+#define PM800_RTC_EXPIRE1_4             (0xD8)
+#define PM800_RTC_TRIM1                 (0xD9)
+#define PM800_RTC_TRIM2                 (0xDA)
+#define PM800_RTC_TRIM3                 (0xDB)
+#define PM800_RTC_TRIM4                 (0xDC)
+#define PM800_RTC_EXPIRE2_1             (0xDD)
+#define PM800_RTC_EXPIRE2_2             (0xDE)
+#define PM800_RTC_EXPIRE2_3             (0xDF)
+#define PM800_RTC_EXPIRE2_4             (0xE0)
+
+#define PM800_POWER_DOWN_LOG1   (0xE5)
+#define PM800_POWER_DOWN_LOG2   (0xE6)
+
+struct pm80x_rtc_info {
+        struct pm80x_chip *chip;
+        struct regmap *map;
+        struct rtc_device *rtc_dev;
+        struct device *dev;
+        struct delayed_work calib_work;
+
+        int irq;
+        int vrtc;
+};
+
+static irqreturn_t rtc_update_handler(int irq, void *data)
+{
+        struct pm80x_rtc_info *info = (struct pm80x_rtc_info *)data;
+        int mask;
+
+        mask = PM800_ALARM | PM800_ALARM_WAKEUP;
+        regmap_update_bits(info->map, PM800_RTC_CONTROL, mask | PM800_ALARM1_EN,
+                           mask);
+        rtc_update_irq(info->rtc_dev, 1, RTC_AF);
+        return IRQ_HANDLED;
+}
+
+static int pm80x_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
+{
+        struct pm80x_rtc_info *info = dev_get_drvdata(dev);
+
+        if (enabled)
+                regmap_update_bits(info->map, PM800_RTC_CONTROL,
+                                   PM800_ALARM1_EN, PM800_ALARM1_EN);
+        else
+                regmap_update_bits(info->map, PM800_RTC_CONTROL,
+                                   PM800_ALARM1_EN, 0);
+        return 0;
+}
+
+/*
+ * Calculate the next alarm time given the requested alarm time mask
+ * and the current time.
+ */
+static void rtc_next_alarm_time(struct rtc_time *next, struct rtc_time *now,
+                                struct rtc_time *alrm)
+{
+        unsigned long next_time;
+        unsigned long now_time;
+
+        next->tm_year = now->tm_year;
+        next->tm_mon = now->tm_mon;
+        next->tm_mday = now->tm_mday;
+        next->tm_hour = alrm->tm_hour;
+        next->tm_min = alrm->tm_min;
+        next->tm_sec = alrm->tm_sec;
+
+        rtc_tm_to_time(now, &now_time);
+        rtc_tm_to_time(next, &next_time);
+
+        if (next_time < now_time) {
+                /* Advance one day */
+                next_time += 60 * 60 * 24;
+                rtc_time_to_tm(next_time, next);
+        }
+}
+
+static int pm80x_rtc_read_time(struct device *dev, struct rtc_time *tm)
+{
+        struct pm80x_rtc_info *info = dev_get_drvdata(dev);
+        unsigned char buf[4];
+        unsigned long ticks, base, data;
+        regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
+        base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+        dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
+
+        /* load 32-bit read-only counter */
+        regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
+        data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+        ticks = base + data;
+        dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
+                base, data, ticks);
+        rtc_time_to_tm(ticks, tm);
+        return 0;
+}
+
+static int pm80x_rtc_set_time(struct device *dev, struct rtc_time *tm)
+{
+        struct pm80x_rtc_info *info = dev_get_drvdata(dev);
+        unsigned char buf[4];
+        unsigned long ticks, base, data;
+        if ((tm->tm_year < 70) || (tm->tm_year > 138)) {
+                dev_dbg(info->dev,
+                        "Set time %d out of range. Please set time between 1970 to 2038.\n",
+                        1900 + tm->tm_year);
+                return -EINVAL;
+        }
+        rtc_tm_to_time(tm, &ticks);
+
+        /* load 32-bit read-only counter */
+        regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
+        data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+        base = ticks - data;
+        dev_dbg(info->dev, "set base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
+                base, data, ticks);
+        buf[0] = base & 0xFF;
+        buf[1] = (base >> 8) & 0xFF;
+        buf[2] = (base >> 16) & 0xFF;
+        buf[3] = (base >> 24) & 0xFF;
+        regmap_raw_write(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
+
+        return 0;
+}
+
+static int pm80x_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+        struct pm80x_rtc_info *info = dev_get_drvdata(dev);
+        unsigned char buf[4];
+        unsigned long ticks, base, data;
+        int ret;
+
+        regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
+        base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+        dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
+
+        regmap_raw_read(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
+        data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+        ticks = base + data;
+        dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
+                base, data, ticks);
+
+        rtc_time_to_tm(ticks, &alrm->time);
+        regmap_read(info->map, PM800_RTC_CONTROL, &ret);
+        alrm->enabled = (ret & PM800_ALARM1_EN) ? 1 : 0;
+        alrm->pending = (ret & (PM800_ALARM | PM800_ALARM_WAKEUP)) ? 1 : 0;
+        return 0;
+}
+
+static int pm80x_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+{
+        struct pm80x_rtc_info *info = dev_get_drvdata(dev);
+        struct rtc_time now_tm, alarm_tm;
+        unsigned long ticks, base, data;
+        unsigned char buf[4];
+        int mask;
+
+        regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_ALARM1_EN, 0);
+
+        regmap_raw_read(info->map, PM800_RTC_EXPIRE2_1, buf, 4);
+        base = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+        dev_dbg(info->dev, "%x-%x-%x-%x\n", buf[0], buf[1], buf[2], buf[3]);
+
+        /* load 32-bit read-only counter */
+        regmap_raw_read(info->map, PM800_RTC_COUNTER1, buf, 4);
+        data = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+        ticks = base + data;
+        dev_dbg(info->dev, "get base:0x%lx, RO count:0x%lx, ticks:0x%lx\n",
+                base, data, ticks);
+
+        rtc_time_to_tm(ticks, &now_tm);
+        dev_dbg(info->dev, "%s, now time : %lu\n", __func__, ticks);
+        rtc_next_alarm_time(&alarm_tm, &now_tm, &alrm->time);
+        /* get new ticks for alarm in 24 hours */
+        rtc_tm_to_time(&alarm_tm, &ticks);
+        dev_dbg(info->dev, "%s, alarm time: %lu\n", __func__, ticks);
+        data = ticks - base;
+
+        buf[0] = data & 0xff;
+        buf[1] = (data >> 8) & 0xff;
+        buf[2] = (data >> 16) & 0xff;
+        buf[3] = (data >> 24) & 0xff;
+        regmap_raw_write(info->map, PM800_RTC_EXPIRE1_1, buf, 4);
+        if (alrm->enabled) {
+                mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN;
+                regmap_update_bits(info->map, PM800_RTC_CONTROL, mask, mask);
+        } else {
+                mask = PM800_ALARM | PM800_ALARM_WAKEUP | PM800_ALARM1_EN;
+                regmap_update_bits(info->map, PM800_RTC_CONTROL, mask,
+                                   PM800_ALARM | PM800_ALARM_WAKEUP);
+        }
+        return 0;
+}
+
+static const struct rtc_class_ops pm80x_rtc_ops = {
+        .read_time = pm80x_rtc_read_time,
+        .set_time = pm80x_rtc_set_time,
+        .read_alarm = pm80x_rtc_read_alarm,
+        .set_alarm = pm80x_rtc_set_alarm,
+        .alarm_irq_enable = pm80x_rtc_alarm_irq_enable,
+};
+
+#ifdef CONFIG_PM
+static int pm80x_rtc_suspend(struct device *dev)
+{
+        return pm80x_dev_suspend(dev);
+}
+
+static int pm80x_rtc_resume(struct device *dev)
+{
+        return pm80x_dev_resume(dev);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(pm80x_rtc_pm_ops, pm80x_rtc_suspend, pm80x_rtc_resume);
+
+static int __devinit pm80x_rtc_probe(struct platform_device *pdev)
+{
+        struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
+        struct pm80x_platform_data *pm80x_pdata;
+        struct pm80x_rtc_pdata *pdata = NULL;
+        struct pm80x_rtc_info *info;
+        struct rtc_time tm;
+        unsigned long ticks = 0;
+        int ret;
+
+        pdata = pdev->dev.platform_data;
+        if (pdata == NULL)
+                dev_warn(&pdev->dev, "No platform data!\n");
+
+        info =
+            devm_kzalloc(&pdev->dev, sizeof(struct pm80x_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;
+        }
+
+        info->chip = chip;
+        info->map = chip->regmap;
+        if (!info->map) {
+                dev_err(&pdev->dev, "no regmap!\n");
+                ret = -EINVAL;
+                goto out;
+        }
+
+        info->dev = &pdev->dev;
+        dev_set_drvdata(&pdev->dev, info);
+
+        ret = pm80x_request_irq(chip, info->irq, 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;
+        }
+
+        ret = pm80x_rtc_read_time(&pdev->dev, &tm);
+        if (ret < 0) {
+                dev_err(&pdev->dev, "Failed to read initial time.\n");
+                goto out_rtc;
+        }
+        if ((tm.tm_year < 70) || (tm.tm_year > 138)) {
+                tm.tm_year = 70;
+                tm.tm_mon = 0;
+                tm.tm_mday = 1;
+                tm.tm_hour = 0;
+                tm.tm_min = 0;
+                tm.tm_sec = 0;
+                ret = pm80x_rtc_set_time(&pdev->dev, &tm);
+                if (ret < 0) {
+                        dev_err(&pdev->dev, "Failed to set initial time.\n");
+                        goto out_rtc;
+                }
+        }
+        rtc_tm_to_time(&tm, &ticks);
+
+        info->rtc_dev = rtc_device_register("88pm80x-rtc", &pdev->dev,
+                                            &pm80x_rtc_ops, THIS_MODULE);
+        if (IS_ERR(info->rtc_dev)) {
+                ret = PTR_ERR(info->rtc_dev);
+                dev_err(&pdev->dev, "Failed to register RTC device: %d\n", ret);
+                goto out_rtc;
+        }
+        /*
+         * enable internal XO instead of internal 3.25MHz clock since it can
+         * free running in PMIC power-down state.
+         */
+        regmap_update_bits(info->map, PM800_RTC_CONTROL, PM800_RTC1_USE_XO,
+                           PM800_RTC1_USE_XO);
+
+        if (pdev->dev.parent->platform_data) {
+                pm80x_pdata = pdev->dev.parent->platform_data;
+                pdata = pm80x_pdata->rtc;
+                if (pdata)
+                        info->rtc_dev->dev.platform_data = &pdata->rtc_wakeup;
+        }
+
+        device_init_wakeup(&pdev->dev, 1);
+
+        return 0;
+out_rtc:
+        pm80x_free_irq(chip, info->irq, info);
+out:
+        return ret;
+}
+
+static int __devexit 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;
+}
+
+static struct platform_driver pm80x_rtc_driver = {
+        .driver = {
+                   .name = "88pm80x-rtc",
+                   .owner = THIS_MODULE,
+                   .pm = &pm80x_rtc_pm_ops,
+                   },
+        .probe = pm80x_rtc_probe,
+        .remove = __devexit_p(pm80x_rtc_remove),
+};
+
+module_platform_driver(pm80x_rtc_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Marvell 88PM80x RTC driver");
+MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
+MODULE_ALIAS("platform:88pm80x-rtc");
diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
index 370889d0489b..bf3c2f669c3c 100644
--- a/drivers/rtc/rtc-ab8500.c
+++ b/drivers/rtc/rtc-ab8500.c
@@ -89,22 +89,17 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
         if (retval < 0)
                 return retval;
 
-        /* Early AB8500 chips will not clear the rtc read request bit */
-        if (abx500_get_chip_id(dev) == 0) {
-                usleep_range(1000, 1000);
-        } else {
-                /* Wait for some cycles after enabling the rtc read in ab8500 */
-                while (time_before(jiffies, timeout)) {
-                        retval = abx500_get_register_interruptible(dev,
-                                AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value);
-                        if (retval < 0)
-                                return retval;
-
-                        if (!(value & RTC_READ_REQUEST))
-                                break;
-
-                        usleep_range(1000, 5000);
-                }
+        /* Wait for some cycles after enabling the rtc read in ab8500 */
+        while (time_before(jiffies, timeout)) {
+                retval = abx500_get_register_interruptible(dev,
+                        AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value);
+                if (retval < 0)
+                        return retval;
+
+                if (!(value & RTC_READ_REQUEST))
+                        break;
+
+                usleep_range(1000, 5000);
         }
 
         /* Read the Watchtime registers */
@@ -225,7 +220,8 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
         int retval, i;
         unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
-        unsigned long mins, secs = 0;
+        unsigned long mins, secs = 0, cursec = 0;
+        struct rtc_time curtm;
 
         if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) {
                 dev_dbg(dev, "year should be equal to or greater than %d\n",
@@ -237,6 +233,18 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
         rtc_tm_to_time(&alarm->time, &secs);
 
         /*
+         * Check whether alarm is set less than 1min.
+         * Since our RTC doesn't support alarm resolution less than 1min,
+         * return -EINVAL, so UIE EMUL can take it up, incase of UIE_ON
+         */
+        ab8500_rtc_read_time(dev, &curtm); /* Read current time */
+        rtc_tm_to_time(&curtm, &cursec);
+        if ((secs - cursec) < 59) {
+                dev_dbg(dev, "Alarm less than 1 minute not supported\r\n");
+                return -EINVAL;
+        }
+
+        /*
          * Convert it to the number of seconds since 01-01-2000 00:00:00, since
          * we only have a small counter in the RTC.
          */
diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index dc474bc6522d..fca9790c7de7 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -27,6 +27,7 @@
 #include <linux/interrupt.h>
 #include <linux/ioctl.h>
 #include <linux/completion.h>
+#include <linux/io.h>
 
 #include <asm/uaccess.h>
 
diff --git a/drivers/rtc/rtc-coh901331.c b/drivers/rtc/rtc-coh901331.c
index a5b8a0c4ea84..76b2156d3c62 100644
--- a/drivers/rtc/rtc-coh901331.c
+++ b/drivers/rtc/rtc-coh901331.c
@@ -155,13 +155,10 @@ static int __exit coh901331_remove(struct platform_device *pdev)
         struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
 
         if (rtap) {
-                free_irq(rtap->irq, rtap);
                 rtc_device_unregister(rtap->rtc);
+                clk_unprepare(rtap->clk);
                 clk_put(rtap->clk);
-                iounmap(rtap->virtbase);
-                release_mem_region(rtap->phybase, rtap->physize);
                 platform_set_drvdata(pdev, NULL);
-                kfree(rtap);
         }
 
         return 0;
@@ -174,49 +171,43 @@ static int __init coh901331_probe(struct platform_device *pdev)
         struct coh901331_port *rtap;
         struct resource *res;
 
-        rtap = kzalloc(sizeof(struct coh901331_port), GFP_KERNEL);
+        rtap = devm_kzalloc(&pdev->dev,
+                            sizeof(struct coh901331_port), GFP_KERNEL);
         if (!rtap)
                 return -ENOMEM;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-        if (!res) {
-                ret = -ENOENT;
-                goto out_no_resource;
-        }
+        if (!res)
+                return -ENOENT;
+
         rtap->phybase = res->start;
         rtap->physize = resource_size(res);
 
-        if (request_mem_region(rtap->phybase, rtap->physize,
-                               "rtc-coh901331") == NULL) {
-                ret = -EBUSY;
-                goto out_no_memregion;
-        }
+        if (devm_request_mem_region(&pdev->dev, rtap->phybase, rtap->physize,
+                                    "rtc-coh901331") == NULL)
+                return -EBUSY;
 
-        rtap->virtbase = ioremap(rtap->phybase, rtap->physize);
-        if (!rtap->virtbase) {
-                ret = -ENOMEM;
-                goto out_no_remap;
-        }
+        rtap->virtbase = devm_ioremap(&pdev->dev, rtap->phybase, rtap->physize);
+        if (!rtap->virtbase)
+                return -ENOMEM;
 
         rtap->irq = platform_get_irq(pdev, 0);
-        if (request_irq(rtap->irq, coh901331_interrupt, 0,
-                        "RTC COH 901 331 Alarm", rtap)) {
-                ret = -EIO;
-                goto out_no_irq;
-        }
+        if (devm_request_irq(&pdev->dev, rtap->irq, coh901331_interrupt, 0,
+                             "RTC COH 901 331 Alarm", rtap))
+                return -EIO;
 
         rtap->clk = clk_get(&pdev->dev, NULL);
         if (IS_ERR(rtap->clk)) {
                 ret = PTR_ERR(rtap->clk);
                 dev_err(&pdev->dev, "could not get clock\n");
-                goto out_no_clk;
+                return ret;
         }
 
         /* We enable/disable the clock only to assure it works */
-        ret = clk_enable(rtap->clk);
+        ret = clk_prepare_enable(rtap->clk);
         if (ret) {
                 dev_err(&pdev->dev, "could not enable clock\n");
-                goto out_no_clk_enable;
+                goto out_no_clk_prepenable;
         }
         clk_disable(rtap->clk);
 
@@ -232,18 +223,9 @@ static int __init coh901331_probe(struct platform_device *pdev)
 
  out_no_rtc:
         platform_set_drvdata(pdev, NULL);
- out_no_clk_enable:
+        clk_unprepare(rtap->clk);
+ out_no_clk_prepenable:
         clk_put(rtap->clk);
- out_no_clk:
-        free_irq(rtap->irq, rtap);
- out_no_irq:
-        iounmap(rtap->virtbase);
- out_no_remap:
-        platform_set_drvdata(pdev, NULL);
- out_no_memregion:
-        release_mem_region(rtap->phybase, SZ_4K);
- out_no_resource:
-        kfree(rtap);
         return ret;
 }
 
@@ -265,6 +247,7 @@ static int coh901331_suspend(struct platform_device *pdev, pm_message_t state)
                 writel(0, rtap->virtbase + COH901331_IRQ_MASK);
                 clk_disable(rtap->clk);
         }
+        clk_unprepare(rtap->clk);
         return 0;
 }
 
@@ -272,6 +255,7 @@ static int coh901331_resume(struct platform_device *pdev)
 {
         struct coh901331_port *rtap = dev_get_drvdata(&pdev->dev);
 
+        clk_prepare(rtap->clk);
         if (device_may_wakeup(&pdev->dev)) {
                 disable_irq_wake(rtap->irq);
         } else {
@@ -293,6 +277,7 @@ static void coh901331_shutdown(struct platform_device *pdev)
         clk_enable(rtap->clk);
         writel(0, rtap->virtbase + COH901331_IRQ_MASK);
         clk_disable(rtap->clk);
+        clk_unprepare(rtap->clk);
 }
 
 static struct platform_driver coh901331_driver = {
diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c
index da6ab5291a41..78070255bd3f 100644
--- a/drivers/rtc/rtc-da9052.c
+++ b/drivers/rtc/rtc-da9052.c
@@ -245,7 +245,7 @@ static int __devinit da9052_rtc_probe(struct platform_device *pdev)
                                    "ALM", rtc);
         if (ret != 0) {
                 rtc_err(rtc->da9052, "irq registration failed: %d\n", ret);
-                goto err_mem;
+                return ret;
         }
 
         rtc->rtc = rtc_device_register(pdev->name, &pdev->dev,
@@ -259,8 +259,6 @@ static int __devinit da9052_rtc_probe(struct platform_device *pdev)
 
 err_free_irq:
         free_irq(rtc->irq, rtc);
-err_mem:
-        devm_kfree(&pdev->dev, rtc);
         return ret;
 }
 
@@ -271,7 +269,6 @@ static int __devexit da9052_rtc_remove(struct platform_device *pdev)
         rtc_device_unregister(rtc->rtc);
         free_irq(rtc->irq, rtc);
         platform_set_drvdata(pdev, NULL);
-        devm_kfree(&pdev->dev, rtc);
 
         return 0;
 }
diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c
index 1459055a83aa..34e4349611db 100644
--- a/drivers/rtc/rtc-max8925.c
+++ b/drivers/rtc/rtc-max8925.c
@@ -69,6 +69,7 @@ struct max8925_rtc_info {
         struct max8925_chip     *chip;
         struct i2c_client       *rtc;
         struct device           *dev;
+        int                     irq;
 };
 
 static irqreturn_t rtc_update_handler(int irq, void *data)
@@ -250,7 +251,7 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
 {
         struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
         struct max8925_rtc_info *info;
-        int irq, ret;
+        int ret;
 
         info = kzalloc(sizeof(struct max8925_rtc_info), GFP_KERNEL);
         if (!info)
@@ -258,13 +259,13 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
         info->chip = chip;
         info->rtc = chip->rtc;
         info->dev = &pdev->dev;
-        irq = chip->irq_base + MAX8925_IRQ_RTC_ALARM0;
+        info->irq = platform_get_irq(pdev, 0);
 
-        ret = request_threaded_irq(irq, NULL, rtc_update_handler,
+        ret = request_threaded_irq(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",
-                        irq, ret);
+                        info->irq, ret);
                 goto out_irq;
         }
 
@@ -285,7 +286,7 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
         return 0;
 out_rtc:
         platform_set_drvdata(pdev, NULL);
-        free_irq(chip->irq_base + MAX8925_IRQ_RTC_ALARM0, info);
+        free_irq(info->irq, info);
 out_irq:
         kfree(info);
         return ret;
@@ -296,7 +297,7 @@ static int __devexit max8925_rtc_remove(struct platform_device *pdev)
         struct max8925_rtc_info *info = platform_get_drvdata(pdev);
 
         if (info) {
-                free_irq(info->chip->irq_base + MAX8925_IRQ_RTC_ALARM0, info);
+                free_irq(info->irq, info);
                 rtc_device_unregister(info->rtc_dev);
                 kfree(info);
         }
diff --git a/drivers/rtc/rtc-mc13xxx.c b/drivers/rtc/rtc-mc13xxx.c
index 546f6850bffb..2643d8874925 100644
--- a/drivers/rtc/rtc-mc13xxx.c
+++ b/drivers/rtc/rtc-mc13xxx.c
@@ -404,9 +404,12 @@ static const struct platform_device_id mc13xxx_rtc_idtable[] = {
                 .name = "mc13783-rtc",
         }, {
                 .name = "mc13892-rtc",
+        }, {
+                .name = "mc34708-rtc",
         },
-        { }
+        { /* sentinel */ }
 };
+MODULE_DEVICE_TABLE(platform, mc13xxx_rtc_idtable);
 
 static struct platform_driver mc13xxx_rtc_driver = {
         .id_table = mc13xxx_rtc_idtable,
@@ -432,4 +435,3 @@ module_exit(mc13xxx_rtc_exit);
 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 MODULE_DESCRIPTION("RTC driver for Freescale MC13XXX PMIC");
 MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/rtc/rtc-mv.c b/drivers/rtc/rtc-mv.c
index b2185f4255aa..ebc1649d45d6 100644
--- a/drivers/rtc/rtc-mv.c
+++ b/drivers/rtc/rtc-mv.c
@@ -297,7 +297,7 @@ static int __exit mv_rtc_remove(struct platform_device *pdev)
 
 #ifdef CONFIG_OF
 static struct of_device_id rtc_mv_of_match_table[] = {
-        { .compatible = "mrvl,orion-rtc", },
+        { .compatible = "marvell,orion-rtc", },
         {}
 };
 #endif
diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index 97a3284bb7c6..c2fe426a6ef2 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -19,6 +19,7 @@
 #include <linux/rtc.h>
 #include <linux/slab.h>
 #include <linux/module.h>
+#include <linux/of.h>
 
 #define DRV_VERSION "0.4.3"
 
@@ -285,9 +286,19 @@ static const struct i2c_device_id pcf8563_id[] = {
 };
 MODULE_DEVICE_TABLE(i2c, pcf8563_id);
 
+#ifdef CONFIG_OF
+static const struct of_device_id pcf8563_of_match[] __devinitconst = {
+        { .compatible = "nxp,pcf8563" },
+        {}
+};
+MODULE_DEVICE_TABLE(of, pcf8563_of_match);
+#endif
+
 static struct i2c_driver pcf8563_driver = {
         .driver         = {
                 .name   = "rtc-pcf8563",
+                .owner  = THIS_MODULE,
+                .of_match_table = of_match_ptr(pcf8563_of_match),
         },
         .probe          = pcf8563_probe,
         .remove         = pcf8563_remove,
diff --git a/drivers/rtc/rtc-pl031.c b/drivers/rtc/rtc-pl031.c
index cc0533994f6e..08378e3cc21c 100644
--- a/drivers/rtc/rtc-pl031.c
+++ b/drivers/rtc/rtc-pl031.c
@@ -68,11 +68,26 @@
 
 #define RTC_TIMER_FREQ 32768
 
+/**
+ * struct pl031_vendor_data - per-vendor variations
+ * @ops: the vendor-specific operations used on this silicon version
+ * @clockwatch: if this is an ST Microelectronics silicon version with a
+ *      clockwatch function
+ * @st_weekday: if this is an ST Microelectronics silicon version that need
+ *      the weekday fix
+ * @irqflags: special IRQ flags per variant
+ */
+struct pl031_vendor_data {
+        struct rtc_class_ops ops;
+        bool clockwatch;
+        bool st_weekday;
+        unsigned long irqflags;
+};
+
 struct pl031_local {
+        struct pl031_vendor_data *vendor;
         struct rtc_device *rtc;
         void __iomem *base;
-        u8 hw_designer;
-        u8 hw_revision:4;
 };
 
 static int pl031_alarm_irq_enable(struct device *dev,
@@ -303,7 +318,8 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
 {
         int ret;
         struct pl031_local *ldata;
-        struct rtc_class_ops *ops = id->data;
+        struct pl031_vendor_data *vendor = id->data;
+        struct rtc_class_ops *ops = &vendor->ops;
         unsigned long time;
 
         ret = amba_request_regions(adev, NULL);
@@ -315,6 +331,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
                 ret = -ENOMEM;
                 goto out;
         }
+        ldata->vendor = vendor;
 
         ldata->base = ioremap(adev->res.start, resource_size(&adev->res));
 
@@ -325,14 +342,11 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
 
         amba_set_drvdata(adev, ldata);
 
-        ldata->hw_designer = amba_manf(adev);
-        ldata->hw_revision = amba_rev(adev);
-
-        dev_dbg(&adev->dev, "designer ID = 0x%02x\n", ldata->hw_designer);
-        dev_dbg(&adev->dev, "revision = 0x%01x\n", ldata->hw_revision);
+        dev_dbg(&adev->dev, "designer ID = 0x%02x\n", amba_manf(adev));
+        dev_dbg(&adev->dev, "revision = 0x%01x\n", amba_rev(adev));
 
         /* Enable the clockwatch on ST Variants */
-        if (ldata->hw_designer == AMBA_VENDOR_ST)
+        if (vendor->clockwatch)
                 writel(readl(ldata->base + RTC_CR) | RTC_CR_CWEN,
                        ldata->base + RTC_CR);
 
@@ -340,7 +354,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
          * On ST PL031 variants, the RTC reset value does not provide correct
          * weekday for 2000-01-01. Correct the erroneous sunday to saturday.
          */
-        if (ldata->hw_designer == AMBA_VENDOR_ST) {
+        if (vendor->st_weekday) {
                 if (readl(ldata->base + RTC_YDR) == 0x2000) {
                         time = readl(ldata->base + RTC_DR);
                         if ((time &
@@ -361,7 +375,7 @@ static int pl031_probe(struct amba_device *adev, const struct amba_id *id)
         }
 
         if (request_irq(adev->irq[0], pl031_interrupt,
-                        0, "rtc-pl031", ldata)) {
+                        vendor->irqflags, "rtc-pl031", ldata)) {
                 ret = -EIO;
                 goto out_no_irq;
         }
@@ -383,48 +397,65 @@ err_req:
 }
 
 /* Operations for the original ARM version */
-static struct rtc_class_ops arm_pl031_ops = {
-        .read_time = pl031_read_time,
-        .set_time = pl031_set_time,
-        .read_alarm = pl031_read_alarm,
-        .set_alarm = pl031_set_alarm,
-        .alarm_irq_enable = pl031_alarm_irq_enable,
+static struct pl031_vendor_data arm_pl031 = {
+        .ops = {
+                .read_time = pl031_read_time,
+                .set_time = pl031_set_time,
+                .read_alarm = pl031_read_alarm,
+                .set_alarm = pl031_set_alarm,
+                .alarm_irq_enable = pl031_alarm_irq_enable,
+        },
+        .irqflags = IRQF_NO_SUSPEND,
 };
 
 /* The First ST derivative */
-static struct rtc_class_ops stv1_pl031_ops = {
-        .read_time = pl031_read_time,
-        .set_time = pl031_set_time,
-        .read_alarm = pl031_read_alarm,
-        .set_alarm = pl031_set_alarm,
-        .alarm_irq_enable = pl031_alarm_irq_enable,
+static struct pl031_vendor_data stv1_pl031 = {
+        .ops = {
+                .read_time = pl031_read_time,
+                .set_time = pl031_set_time,
+                .read_alarm = pl031_read_alarm,
+                .set_alarm = pl031_set_alarm,
+                .alarm_irq_enable = pl031_alarm_irq_enable,
+        },
+        .clockwatch = true,
+        .st_weekday = true,
+        .irqflags = IRQF_NO_SUSPEND,
 };
 
 /* And the second ST derivative */
-static struct rtc_class_ops stv2_pl031_ops = {
-        .read_time = pl031_stv2_read_time,
-        .set_time = pl031_stv2_set_time,
-        .read_alarm = pl031_stv2_read_alarm,
-        .set_alarm = pl031_stv2_set_alarm,
-        .alarm_irq_enable = pl031_alarm_irq_enable,
+static struct pl031_vendor_data stv2_pl031 = {
+        .ops = {
+                .read_time = pl031_stv2_read_time,
+                .set_time = pl031_stv2_set_time,
+                .read_alarm = pl031_stv2_read_alarm,
+                .set_alarm = pl031_stv2_set_alarm,
+                .alarm_irq_enable = pl031_alarm_irq_enable,
+        },
+        .clockwatch = true,
+        .st_weekday = true,
+        /*
+         * This variant shares the IRQ with another block and must not
+         * suspend that IRQ line.
+         */
+        .irqflags = IRQF_SHARED | IRQF_NO_SUSPEND,
 };
 
 static struct amba_id pl031_ids[] = {
         {
                 .id = 0x00041031,
                 .mask = 0x000fffff,
-                .data = &arm_pl031_ops,
+                .data = &arm_pl031,
         },
         /* ST Micro variants */
         {
                 .id = 0x00180031,
                 .mask = 0x00ffffff,
-                .data = &stv1_pl031_ops,
+                .data = &stv1_pl031,
         },
         {
                 .id = 0x00280031,
                 .mask = 0x00ffffff,
-                .data = &stv2_pl031_ops,
+                .data = &stv2_pl031,
         },
         {0, 0},
 };
diff --git a/drivers/rtc/rtc-r9701.c b/drivers/rtc/rtc-r9701.c
index 33b6ba0afa0d..2c183ebff715 100644
--- a/drivers/rtc/rtc-r9701.c
+++ b/drivers/rtc/rtc-r9701.c
@@ -138,8 +138,7 @@ static int __devinit r9701_probe(struct spi_device *spi)
          * contain invalid values. If so, try to write a default date:
          * 2000/1/1 00:00:00
          */
-        r9701_get_datetime(&spi->dev, &dt);
-        if (rtc_valid_tm(&dt)) {
+        if (r9701_get_datetime(&spi->dev, &dt)) {
                 dev_info(&spi->dev, "trying to repair invalid date/time\n");
                 dt.tm_sec  = 0;
                 dt.tm_min  = 0;
@@ -148,7 +147,8 @@ static int __devinit r9701_probe(struct spi_device *spi)
                 dt.tm_mon  = 0;
                 dt.tm_year = 100;
 
-                if (r9701_set_datetime(&spi->dev, &dt)) {
+                if (r9701_set_datetime(&spi->dev, &dt) ||
+                                r9701_get_datetime(&spi->dev, &dt)) {
                         dev_err(&spi->dev, "cannot repair RTC register\n");
                         return -ENODEV;
                 }
diff --git a/drivers/rtc/rtc-s3c.c b/drivers/rtc/rtc-s3c.c
index 7e6af0b22f17..bfbd92c8d1c9 100644
--- a/drivers/rtc/rtc-s3c.c
+++ b/drivers/rtc/rtc-s3c.c
@@ -26,10 +26,10 @@
 #include <linux/log2.h>
 #include <linux/slab.h>
 #include <linux/of.h>
+#include <linux/uaccess.h>
+#include <linux/io.h>
 
 #include <mach/hardware.h>
-#include <asm/uaccess.h>
-#include <asm/io.h>
 #include <asm/irq.h>
 #include <plat/regs-rtc.h>
 
diff --git a/drivers/rtc/rtc-stmp3xxx.c b/drivers/rtc/rtc-stmp3xxx.c
index 10287865e330..739ef55694f4 100644
--- a/drivers/rtc/rtc-stmp3xxx.c
+++ b/drivers/rtc/rtc-stmp3xxx.c
@@ -25,6 +25,7 @@
 #include <linux/interrupt.h>
 #include <linux/rtc.h>
 #include <linux/slab.h>
+#include <linux/of_device.h>
 
 #include <mach/common.h>
 
@@ -265,6 +266,12 @@ static int stmp3xxx_rtc_resume(struct platform_device *dev)
 #define stmp3xxx_rtc_resume     NULL
 #endif
 
+static const struct of_device_id rtc_dt_ids[] = {
+        { .compatible = "fsl,stmp3xxx-rtc", },
+        { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, rtc_dt_ids);
+
 static struct platform_driver stmp3xxx_rtcdrv = {
         .probe          = stmp3xxx_rtc_probe,
         .remove         = stmp3xxx_rtc_remove,
@@ -273,6 +280,7 @@ static struct platform_driver stmp3xxx_rtcdrv = {
         .driver         = {
                 .name   = "stmp3xxx-rtc",
                 .owner  = THIS_MODULE,
+                .of_match_table = rtc_dt_ids,
         },
 };
 
diff --git a/drivers/rtc/rtc-wm831x.c b/drivers/rtc/rtc-wm831x.c
index 59c6245e0421..ea5c6f857ca5 100644
--- a/drivers/rtc/rtc-wm831x.c
+++ b/drivers/rtc/rtc-wm831x.c
@@ -24,7 +24,7 @@
 #include <linux/mfd/wm831x/core.h>
 #include <linux/delay.h>
 #include <linux/platform_device.h>
-
+#include <linux/random.h>
 
 /*
  * R16416 (0x4020) - RTC Write Counter
@@ -96,6 +96,26 @@ struct wm831x_rtc {
         unsigned int alarm_enabled:1;
 };
 
+static void wm831x_rtc_add_randomness(struct wm831x *wm831x)
+{
+        int ret;
+        u16 reg;
+
+        /*
+         * The write counter contains a pseudo-random number which is
+         * regenerated every time we set the RTC so it should be a
+         * useful per-system source of entropy.
+         */
+        ret = wm831x_reg_read(wm831x, WM831X_RTC_WRITE_COUNTER);
+        if (ret >= 0) {
+                reg = ret;
+                add_device_randomness(&reg, sizeof(reg));
+        } else {
+                dev_warn(wm831x->dev, "Failed to read RTC write counter: %d\n",
+                         ret);
+        }
+}
+
 /*
  * Read current time and date in RTC
  */
@@ -431,6 +451,8 @@ static int wm831x_rtc_probe(struct platform_device *pdev)
                         alm_irq, ret);
         }
 
+        wm831x_rtc_add_randomness(wm831x);
+
         return 0;
 
 err: