Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull ARM SoC platform updates from Arnd Bergmann:
 "This release brings up a new platform based on the old ARM9 core: the
  Nuvoton NPCM is used as a baseboard management controller, competing
  with the better known ASpeed AST2xx series.

  Another important change is the addition of ARMv7-A based chips in
  mach-stm32. The older parts in this platform are ARMv7-M based
  microcontrollers, now they are expanding to general-purpose workloads.

  The other changes are the usual defconfig updates to enable additional
  drivers, lesser bugfixes. The largest updates as often are the ongoing
  OMAP cleanups, but we also have a number of changes for the older PXA
  and davinci platforms this time.

  For the Renesas shmobile/r-car platform, some new infrastructure is
  needed to make the watchdog work correctly.

  Supporting Multiprocessing on Allwinner A80 required a significant
  amount of new code, but is not doing anything unexpected"

* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (179 commits)
  arm: npcm: modify configuration for the NPCM7xx BMC.
  MAINTAINERS: update entry for ARM/berlin
  ARM: omap2: fix am43xx build without L2X0
  ARM: davinci: da8xx: simplify CFGCHIP regmap_config
  ARM: davinci: da8xx: fix oops in USB PHY driver due to stack allocated platform_data
  ARM: multi_v7_defconfig: add NXP FlexCAN IP support
  ARM: multi_v7_defconfig: enable thermal driver for i.MX devices
  ARM: multi_v7_defconfig: add RN5T618 PMIC family support
  ARM: multi_v7_defconfig: add NXP graphics drivers
  ARM: multi_v7_defconfig: add GPMI NAND controller support
  ARM: multi_v7_defconfig: add OCOTP driver for NXP SoCs
  ARM: multi_v7_defconfig: configure I2C driver built-in
  arm64: defconfig: add CONFIG_UNIPHIER_THERMAL and CONFIG_SNI_AVE
  ARM: imx: fix imx6sll-only build
  ARM: imx: select ARM_CPU_SUSPEND for CPU_IDLE as well
  ARM: mxs_defconfig: Re-sync defconfig
  ARM: imx_v4_v5_defconfig: Use the generic fsl-asoc-card driver
  ARM: imx_v4_v5_defconfig: Re-sync defconfig
  arm64: defconfig: enable stmmac ethernet to defconfig
  ARM: EXYNOS: Simplify code in coupled CPU idle hot path
  ...

3 files changed, 1004 insertions, 0 deletions

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 6021a5af21da..9ee2888275c1 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -21,6 +21,9 @@ config CLKEVT_I8253
 config I8253_LOCK
         bool
 
+config OMAP_DM_TIMER
+        bool
+
 config CLKBLD_I8253
         def_bool y if CLKSRC_I8253 || CLKEVT_I8253 || I8253_LOCK
 
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index f0cb07637a65..e8e76dfef00b 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_EM_TIMER_STI)	+= em_sti.o
 obj-$(CONFIG_CLKBLD_I8253)      += i8253.o
 obj-$(CONFIG_CLKSRC_MMIO)       += mmio.o
 obj-$(CONFIG_DIGICOLOR_TIMER)   += timer-digicolor.o
+obj-$(CONFIG_OMAP_DM_TIMER)     += timer-ti-dm.o
 obj-$(CONFIG_DW_APB_TIMER)      += dw_apb_timer.o
 obj-$(CONFIG_DW_APB_TIMER_OF)   += dw_apb_timer_of.o
 obj-$(CONFIG_FTTMR010_TIMER)    += timer-fttmr010.o
diff --git a/drivers/clocksource/timer-ti-dm.c b/drivers/clocksource/timer-ti-dm.c
new file mode 100644
index 000000000000..4cce6b224b87
--- /dev/null
+++ b/drivers/clocksource/timer-ti-dm.c
@@ -0,0 +1,1000 @@
+/*
+ * linux/arch/arm/plat-omap/dmtimer.c
+ *
+ * OMAP Dual-Mode Timers
+ *
+ * Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
+ * Tarun Kanti DebBarma <tarun.kanti@ti.com>
+ * Thara Gopinath <thara@ti.com>
+ *
+ * dmtimer adaptation to platform_driver.
+ *
+ * Copyright (C) 2005 Nokia Corporation
+ * OMAP2 support by Juha Yrjola
+ * API improvements and OMAP2 clock framework support by Timo Teras
+ *
+ * Copyright (C) 2009 Texas Instruments
+ * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * 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 SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
+ * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * 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.,
+ * 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
+#include <linux/module.h>
+#include <linux/io.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/pm_runtime.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/platform_data/dmtimer-omap.h>
+
+#include <clocksource/timer-ti-dm.h>
+
+static u32 omap_reserved_systimers;
+static LIST_HEAD(omap_timer_list);
+static DEFINE_SPINLOCK(dm_timer_lock);
+
+enum {
+        REQUEST_ANY = 0,
+        REQUEST_BY_ID,
+        REQUEST_BY_CAP,
+        REQUEST_BY_NODE,
+};
+
+/**
+ * omap_dm_timer_read_reg - read timer registers in posted and non-posted mode
+ * @timer:      timer pointer over which read operation to perform
+ * @reg:        lowest byte holds the register offset
+ *
+ * The posted mode bit is encoded in reg. Note that in posted mode write
+ * pending bit must be checked. Otherwise a read of a non completed write
+ * will produce an error.
+ */
+static inline u32 omap_dm_timer_read_reg(struct omap_dm_timer *timer, u32 reg)
+{
+        WARN_ON((reg & 0xff) < _OMAP_TIMER_WAKEUP_EN_OFFSET);
+        return __omap_dm_timer_read(timer, reg, timer->posted);
+}
+
+/**
+ * omap_dm_timer_write_reg - write timer registers in posted and non-posted mode
+ * @timer:      timer pointer over which write operation is to perform
+ * @reg:        lowest byte holds the register offset
+ * @value:      data to write into the register
+ *
+ * The posted mode bit is encoded in reg. Note that in posted mode the write
+ * pending bit must be checked. Otherwise a write on a register which has a
+ * pending write will be lost.
+ */
+static void omap_dm_timer_write_reg(struct omap_dm_timer *timer, u32 reg,
+                                                u32 value)
+{
+        WARN_ON((reg & 0xff) < _OMAP_TIMER_WAKEUP_EN_OFFSET);
+        __omap_dm_timer_write(timer, reg, value, timer->posted);
+}
+
+static void omap_timer_restore_context(struct omap_dm_timer *timer)
+{
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG,
+                                timer->context.twer);
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG,
+                                timer->context.tcrr);
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG,
+                                timer->context.tldr);
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG,
+                                timer->context.tmar);
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG,
+                                timer->context.tsicr);
+        writel_relaxed(timer->context.tier, timer->irq_ena);
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG,
+                                timer->context.tclr);
+}
+
+static int omap_dm_timer_reset(struct omap_dm_timer *timer)
+{
+        u32 l, timeout = 100000;
+
+        if (timer->revision != 1)
+                return -EINVAL;
+
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_IF_CTRL_REG, 0x06);
+
+        do {
+                l = __omap_dm_timer_read(timer,
+                                         OMAP_TIMER_V1_SYS_STAT_OFFSET, 0);
+        } while (!l && timeout--);
+
+        if (!timeout) {
+                dev_err(&timer->pdev->dev, "Timer failed to reset\n");
+                return -ETIMEDOUT;
+        }
+
+        /* Configure timer for smart-idle mode */
+        l = __omap_dm_timer_read(timer, OMAP_TIMER_OCP_CFG_OFFSET, 0);
+        l |= 0x2 << 0x3;
+        __omap_dm_timer_write(timer, OMAP_TIMER_OCP_CFG_OFFSET, l, 0);
+
+        timer->posted = 0;
+
+        return 0;
+}
+
+static int omap_dm_timer_of_set_source(struct omap_dm_timer *timer)
+{
+        int ret;
+        struct clk *parent;
+
+        /*
+         * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
+         * do not call clk_get() for these devices.
+         */
+        if (!timer->fclk)
+                return -ENODEV;
+
+        parent = clk_get(&timer->pdev->dev, NULL);
+        if (IS_ERR(parent))
+                return -ENODEV;
+
+        ret = clk_set_parent(timer->fclk, parent);
+        if (ret < 0)
+                pr_err("%s: failed to set parent\n", __func__);
+
+        clk_put(parent);
+
+        return ret;
+}
+
+static int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
+{
+        int ret;
+        const char *parent_name;
+        struct clk *parent;
+        struct dmtimer_platform_data *pdata;
+
+        if (unlikely(!timer) || IS_ERR(timer->fclk))
+                return -EINVAL;
+
+        switch (source) {
+        case OMAP_TIMER_SRC_SYS_CLK:
+                parent_name = "timer_sys_ck";
+                break;
+        case OMAP_TIMER_SRC_32_KHZ:
+                parent_name = "timer_32k_ck";
+                break;
+        case OMAP_TIMER_SRC_EXT_CLK:
+                parent_name = "timer_ext_ck";
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        pdata = timer->pdev->dev.platform_data;
+
+        /*
+         * FIXME: Used for OMAP1 devices only because they do not currently
+         * use the clock framework to set the parent clock. To be removed
+         * once OMAP1 migrated to using clock framework for dmtimers
+         */
+        if (pdata && pdata->set_timer_src)
+                return pdata->set_timer_src(timer->pdev, source);
+
+#if defined(CONFIG_COMMON_CLK)
+        /* Check if the clock has configurable parents */
+        if (clk_hw_get_num_parents(__clk_get_hw(timer->fclk)) < 2)
+                return 0;
+#endif
+
+        parent = clk_get(&timer->pdev->dev, parent_name);
+        if (IS_ERR(parent)) {
+                pr_err("%s: %s not found\n", __func__, parent_name);
+                return -EINVAL;
+        }
+
+        ret = clk_set_parent(timer->fclk, parent);
+        if (ret < 0)
+                pr_err("%s: failed to set %s as parent\n", __func__,
+                        parent_name);
+
+        clk_put(parent);
+
+        return ret;
+}
+
+static void omap_dm_timer_enable(struct omap_dm_timer *timer)
+{
+        int c;
+
+        pm_runtime_get_sync(&timer->pdev->dev);
+
+        if (!(timer->capability & OMAP_TIMER_ALWON)) {
+                if (timer->get_context_loss_count) {
+                        c = timer->get_context_loss_count(&timer->pdev->dev);
+                        if (c != timer->ctx_loss_count) {
+                                omap_timer_restore_context(timer);
+                                timer->ctx_loss_count = c;
+                        }
+                } else {
+                        omap_timer_restore_context(timer);
+                }
+        }
+}
+
+static void omap_dm_timer_disable(struct omap_dm_timer *timer)
+{
+        pm_runtime_put_sync(&timer->pdev->dev);
+}
+
+static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
+{
+        int rc;
+
+        /*
+         * FIXME: OMAP1 devices do not use the clock framework for dmtimers so
+         * do not call clk_get() for these devices.
+         */
+        if (!(timer->capability & OMAP_TIMER_NEEDS_RESET)) {
+                timer->fclk = clk_get(&timer->pdev->dev, "fck");
+                if (WARN_ON_ONCE(IS_ERR(timer->fclk))) {
+                        dev_err(&timer->pdev->dev, ": No fclk handle.\n");
+                        return -EINVAL;
+                }
+        }
+
+        omap_dm_timer_enable(timer);
+
+        if (timer->capability & OMAP_TIMER_NEEDS_RESET) {
+                rc = omap_dm_timer_reset(timer);
+                if (rc) {
+                        omap_dm_timer_disable(timer);
+                        return rc;
+                }
+        }
+
+        __omap_dm_timer_enable_posted(timer);
+        omap_dm_timer_disable(timer);
+
+        rc = omap_dm_timer_of_set_source(timer);
+        if (rc == -ENODEV)
+                return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
+
+        return rc;
+}
+
+static inline u32 omap_dm_timer_reserved_systimer(int id)
+{
+        return (omap_reserved_systimers & (1 << (id - 1))) ? 1 : 0;
+}
+
+int omap_dm_timer_reserve_systimer(int id)
+{
+        if (omap_dm_timer_reserved_systimer(id))
+                return -ENODEV;
+
+        omap_reserved_systimers |= (1 << (id - 1));
+
+        return 0;
+}
+
+static struct omap_dm_timer *_omap_dm_timer_request(int req_type, void *data)
+{
+        struct omap_dm_timer *timer = NULL, *t;
+        struct device_node *np = NULL;
+        unsigned long flags;
+        u32 cap = 0;
+        int id = 0;
+
+        switch (req_type) {
+        case REQUEST_BY_ID:
+                id = *(int *)data;
+                break;
+        case REQUEST_BY_CAP:
+                cap = *(u32 *)data;
+                break;
+        case REQUEST_BY_NODE:
+                np = (struct device_node *)data;
+                break;
+        default:
+                /* REQUEST_ANY */
+                break;
+        }
+
+        spin_lock_irqsave(&dm_timer_lock, flags);
+        list_for_each_entry(t, &omap_timer_list, node) {
+                if (t->reserved)
+                        continue;
+
+                switch (req_type) {
+                case REQUEST_BY_ID:
+                        if (id == t->pdev->id) {
+                                timer = t;
+                                timer->reserved = 1;
+                                goto found;
+                        }
+                        break;
+                case REQUEST_BY_CAP:
+                        if (cap == (t->capability & cap)) {
+                                /*
+                                 * If timer is not NULL, we have already found
+                                 * one timer. But it was not an exact match
+                                 * because it had more capabilities than what
+                                 * was required. Therefore, unreserve the last
+                                 * timer found and see if this one is a better
+                                 * match.
+                                 */
+                                if (timer)
+                                        timer->reserved = 0;
+                                timer = t;
+                                timer->reserved = 1;
+
+                                /* Exit loop early if we find an exact match */
+                                if (t->capability == cap)
+                                        goto found;
+                        }
+                        break;
+                case REQUEST_BY_NODE:
+                        if (np == t->pdev->dev.of_node) {
+                                timer = t;
+                                timer->reserved = 1;
+                                goto found;
+                        }
+                        break;
+                default:
+                        /* REQUEST_ANY */
+                        timer = t;
+                        timer->reserved = 1;
+                        goto found;
+                }
+        }
+found:
+        spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+        if (timer && omap_dm_timer_prepare(timer)) {
+                timer->reserved = 0;
+                timer = NULL;
+        }
+
+        if (!timer)
+                pr_debug("%s: timer request failed!\n", __func__);
+
+        return timer;
+}
+
+static struct omap_dm_timer *omap_dm_timer_request(void)
+{
+        return _omap_dm_timer_request(REQUEST_ANY, NULL);
+}
+
+static struct omap_dm_timer *omap_dm_timer_request_specific(int id)
+{
+        /* Requesting timer by ID is not supported when device tree is used */
+        if (of_have_populated_dt()) {
+                pr_warn("%s: Please use omap_dm_timer_request_by_node()\n",
+                        __func__);
+                return NULL;
+        }
+
+        return _omap_dm_timer_request(REQUEST_BY_ID, &id);
+}
+
+/**
+ * omap_dm_timer_request_by_cap - Request a timer by capability
+ * @cap:        Bit mask of capabilities to match
+ *
+ * Find a timer based upon capabilities bit mask. Callers of this function
+ * should use the definitions found in the plat/dmtimer.h file under the
+ * comment "timer capabilities used in hwmod database". Returns pointer to
+ * timer handle on success and a NULL pointer on failure.
+ */
+struct omap_dm_timer *omap_dm_timer_request_by_cap(u32 cap)
+{
+        return _omap_dm_timer_request(REQUEST_BY_CAP, &cap);
+}
+
+/**
+ * omap_dm_timer_request_by_node - Request a timer by device-tree node
+ * @np:         Pointer to device-tree timer node
+ *
+ * Request a timer based upon a device node pointer. Returns pointer to
+ * timer handle on success and a NULL pointer on failure.
+ */
+static struct omap_dm_timer *omap_dm_timer_request_by_node(struct device_node *np)
+{
+        if (!np)
+                return NULL;
+
+        return _omap_dm_timer_request(REQUEST_BY_NODE, np);
+}
+
+static int omap_dm_timer_free(struct omap_dm_timer *timer)
+{
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        clk_put(timer->fclk);
+
+        WARN_ON(!timer->reserved);
+        timer->reserved = 0;
+        return 0;
+}
+
+int omap_dm_timer_get_irq(struct omap_dm_timer *timer)
+{
+        if (timer)
+                return timer->irq;
+        return -EINVAL;
+}
+
+#if defined(CONFIG_ARCH_OMAP1)
+#include <mach/hardware.h>
+
+static struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
+{
+        return NULL;
+}
+
+/**
+ * omap_dm_timer_modify_idlect_mask - Check if any running timers use ARMXOR
+ * @inputmask: current value of idlect mask
+ */
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
+{
+        int i = 0;
+        struct omap_dm_timer *timer = NULL;
+        unsigned long flags;
+
+        /* If ARMXOR cannot be idled this function call is unnecessary */
+        if (!(inputmask & (1 << 1)))
+                return inputmask;
+
+        /* If any active timer is using ARMXOR return modified mask */
+        spin_lock_irqsave(&dm_timer_lock, flags);
+        list_for_each_entry(timer, &omap_timer_list, node) {
+                u32 l;
+
+                l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+                if (l & OMAP_TIMER_CTRL_ST) {
+                        if (((omap_readl(MOD_CONF_CTRL_1) >> (i * 2)) & 0x03) == 0)
+                                inputmask &= ~(1 << 1);
+                        else
+                                inputmask &= ~(1 << 2);
+                }
+                i++;
+        }
+        spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+        return inputmask;
+}
+
+#else
+
+static struct clk *omap_dm_timer_get_fclk(struct omap_dm_timer *timer)
+{
+        if (timer && !IS_ERR(timer->fclk))
+                return timer->fclk;
+        return NULL;
+}
+
+__u32 omap_dm_timer_modify_idlect_mask(__u32 inputmask)
+{
+        BUG();
+
+        return 0;
+}
+
+#endif
+
+int omap_dm_timer_trigger(struct omap_dm_timer *timer)
+{
+        if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+                pr_err("%s: timer not available or enabled.\n", __func__);
+                return -EINVAL;
+        }
+
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
+        return 0;
+}
+
+static int omap_dm_timer_start(struct omap_dm_timer *timer)
+{
+        u32 l;
+
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        omap_dm_timer_enable(timer);
+
+        l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+        if (!(l & OMAP_TIMER_CTRL_ST)) {
+                l |= OMAP_TIMER_CTRL_ST;
+                omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+        }
+
+        /* Save the context */
+        timer->context.tclr = l;
+        return 0;
+}
+
+static int omap_dm_timer_stop(struct omap_dm_timer *timer)
+{
+        unsigned long rate = 0;
+
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        if (!(timer->capability & OMAP_TIMER_NEEDS_RESET))
+                rate = clk_get_rate(timer->fclk);
+
+        __omap_dm_timer_stop(timer, timer->posted, rate);
+
+        /*
+         * Since the register values are computed and written within
+         * __omap_dm_timer_stop, we need to use read to retrieve the
+         * context.
+         */
+        timer->context.tclr =
+                        omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+        omap_dm_timer_disable(timer);
+        return 0;
+}
+
+static int omap_dm_timer_set_load(struct omap_dm_timer *timer, int autoreload,
+                                  unsigned int load)
+{
+        u32 l;
+
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        omap_dm_timer_enable(timer);
+        l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+        if (autoreload)
+                l |= OMAP_TIMER_CTRL_AR;
+        else
+                l &= ~OMAP_TIMER_CTRL_AR;
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
+
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_TRIGGER_REG, 0);
+        /* Save the context */
+        timer->context.tclr = l;
+        timer->context.tldr = load;
+        omap_dm_timer_disable(timer);
+        return 0;
+}
+
+/* Optimized set_load which removes costly spin wait in timer_start */
+int omap_dm_timer_set_load_start(struct omap_dm_timer *timer, int autoreload,
+                            unsigned int load)
+{
+        u32 l;
+
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        omap_dm_timer_enable(timer);
+
+        l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+        if (autoreload) {
+                l |= OMAP_TIMER_CTRL_AR;
+                omap_dm_timer_write_reg(timer, OMAP_TIMER_LOAD_REG, load);
+        } else {
+                l &= ~OMAP_TIMER_CTRL_AR;
+        }
+        l |= OMAP_TIMER_CTRL_ST;
+
+        __omap_dm_timer_load_start(timer, l, load, timer->posted);
+
+        /* Save the context */
+        timer->context.tclr = l;
+        timer->context.tldr = load;
+        timer->context.tcrr = load;
+        return 0;
+}
+static int omap_dm_timer_set_match(struct omap_dm_timer *timer, int enable,
+                                   unsigned int match)
+{
+        u32 l;
+
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        omap_dm_timer_enable(timer);
+        l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+        if (enable)
+                l |= OMAP_TIMER_CTRL_CE;
+        else
+                l &= ~OMAP_TIMER_CTRL_CE;
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_MATCH_REG, match);
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+
+        /* Save the context */
+        timer->context.tclr = l;
+        timer->context.tmar = match;
+        omap_dm_timer_disable(timer);
+        return 0;
+}
+
+static int omap_dm_timer_set_pwm(struct omap_dm_timer *timer, int def_on,
+                                 int toggle, int trigger)
+{
+        u32 l;
+
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        omap_dm_timer_enable(timer);
+        l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+        l &= ~(OMAP_TIMER_CTRL_GPOCFG | OMAP_TIMER_CTRL_SCPWM |
+               OMAP_TIMER_CTRL_PT | (0x03 << 10));
+        if (def_on)
+                l |= OMAP_TIMER_CTRL_SCPWM;
+        if (toggle)
+                l |= OMAP_TIMER_CTRL_PT;
+        l |= trigger << 10;
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+
+        /* Save the context */
+        timer->context.tclr = l;
+        omap_dm_timer_disable(timer);
+        return 0;
+}
+
+static int omap_dm_timer_set_prescaler(struct omap_dm_timer *timer,
+                                        int prescaler)
+{
+        u32 l;
+
+        if (unlikely(!timer) || prescaler < -1 || prescaler > 7)
+                return -EINVAL;
+
+        omap_dm_timer_enable(timer);
+        l = omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG);
+        l &= ~(OMAP_TIMER_CTRL_PRE | (0x07 << 2));
+        if (prescaler >= 0) {
+                l |= OMAP_TIMER_CTRL_PRE;
+                l |= prescaler << 2;
+        }
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_CTRL_REG, l);
+
+        /* Save the context */
+        timer->context.tclr = l;
+        omap_dm_timer_disable(timer);
+        return 0;
+}
+
+static int omap_dm_timer_set_int_enable(struct omap_dm_timer *timer,
+                                        unsigned int value)
+{
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        omap_dm_timer_enable(timer);
+        __omap_dm_timer_int_enable(timer, value);
+
+        /* Save the context */
+        timer->context.tier = value;
+        timer->context.twer = value;
+        omap_dm_timer_disable(timer);
+        return 0;
+}
+
+/**
+ * omap_dm_timer_set_int_disable - disable timer interrupts
+ * @timer:      pointer to timer handle
+ * @mask:       bit mask of interrupts to be disabled
+ *
+ * Disables the specified timer interrupts for a timer.
+ */
+static int omap_dm_timer_set_int_disable(struct omap_dm_timer *timer, u32 mask)
+{
+        u32 l = mask;
+
+        if (unlikely(!timer))
+                return -EINVAL;
+
+        omap_dm_timer_enable(timer);
+
+        if (timer->revision == 1)
+                l = readl_relaxed(timer->irq_ena) & ~mask;
+
+        writel_relaxed(l, timer->irq_dis);
+        l = omap_dm_timer_read_reg(timer, OMAP_TIMER_WAKEUP_EN_REG) & ~mask;
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_WAKEUP_EN_REG, l);
+
+        /* Save the context */
+        timer->context.tier &= ~mask;
+        timer->context.twer &= ~mask;
+        omap_dm_timer_disable(timer);
+        return 0;
+}
+
+static unsigned int omap_dm_timer_read_status(struct omap_dm_timer *timer)
+{
+        unsigned int l;
+
+        if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+                pr_err("%s: timer not available or enabled.\n", __func__);
+                return 0;
+        }
+
+        l = readl_relaxed(timer->irq_stat);
+
+        return l;
+}
+
+static int omap_dm_timer_write_status(struct omap_dm_timer *timer, unsigned int value)
+{
+        if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev)))
+                return -EINVAL;
+
+        __omap_dm_timer_write_status(timer, value);
+
+        return 0;
+}
+
+static unsigned int omap_dm_timer_read_counter(struct omap_dm_timer *timer)
+{
+        if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+                pr_err("%s: timer not iavailable or enabled.\n", __func__);
+                return 0;
+        }
+
+        return __omap_dm_timer_read_counter(timer, timer->posted);
+}
+
+static int omap_dm_timer_write_counter(struct omap_dm_timer *timer, unsigned int value)
+{
+        if (unlikely(!timer || pm_runtime_suspended(&timer->pdev->dev))) {
+                pr_err("%s: timer not available or enabled.\n", __func__);
+                return -EINVAL;
+        }
+
+        omap_dm_timer_write_reg(timer, OMAP_TIMER_COUNTER_REG, value);
+
+        /* Save the context */
+        timer->context.tcrr = value;
+        return 0;
+}
+
+int omap_dm_timers_active(void)
+{
+        struct omap_dm_timer *timer;
+
+        list_for_each_entry(timer, &omap_timer_list, node) {
+                if (!timer->reserved)
+                        continue;
+
+                if (omap_dm_timer_read_reg(timer, OMAP_TIMER_CTRL_REG) &
+                    OMAP_TIMER_CTRL_ST) {
+                        return 1;
+                }
+        }
+        return 0;
+}
+
+static const struct of_device_id omap_timer_match[];
+
+/**
+ * omap_dm_timer_probe - probe function called for every registered device
+ * @pdev:       pointer to current timer platform device
+ *
+ * Called by driver framework at the end of device registration for all
+ * timer devices.
+ */
+static int omap_dm_timer_probe(struct platform_device *pdev)
+{
+        unsigned long flags;
+        struct omap_dm_timer *timer;
+        struct resource *mem, *irq;
+        struct device *dev = &pdev->dev;
+        const struct dmtimer_platform_data *pdata;
+        int ret;
+
+        pdata = of_device_get_match_data(dev);
+        if (!pdata)
+                pdata = dev_get_platdata(dev);
+        else
+                dev->platform_data = (void *)pdata;
+
+        if (!pdata) {
+                dev_err(dev, "%s: no platform data.\n", __func__);
+                return -ENODEV;
+        }
+
+        irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+        if (unlikely(!irq)) {
+                dev_err(dev, "%s: no IRQ resource.\n", __func__);
+                return -ENODEV;
+        }
+
+        mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (unlikely(!mem)) {
+                dev_err(dev, "%s: no memory resource.\n", __func__);
+                return -ENODEV;
+        }
+
+        timer = devm_kzalloc(dev, sizeof(*timer), GFP_KERNEL);
+        if (!timer)
+                return  -ENOMEM;
+
+        timer->fclk = ERR_PTR(-ENODEV);
+        timer->io_base = devm_ioremap_resource(dev, mem);
+        if (IS_ERR(timer->io_base))
+                return PTR_ERR(timer->io_base);
+
+        if (dev->of_node) {
+                if (of_find_property(dev->of_node, "ti,timer-alwon", NULL))
+                        timer->capability |= OMAP_TIMER_ALWON;
+                if (of_find_property(dev->of_node, "ti,timer-dsp", NULL))
+                        timer->capability |= OMAP_TIMER_HAS_DSP_IRQ;
+                if (of_find_property(dev->of_node, "ti,timer-pwm", NULL))
+                        timer->capability |= OMAP_TIMER_HAS_PWM;
+                if (of_find_property(dev->of_node, "ti,timer-secure", NULL))
+                        timer->capability |= OMAP_TIMER_SECURE;
+        } else {
+                timer->id = pdev->id;
+                timer->capability = pdata->timer_capability;
+                timer->reserved = omap_dm_timer_reserved_systimer(timer->id);
+                timer->get_context_loss_count = pdata->get_context_loss_count;
+        }
+
+        if (pdata)
+                timer->errata = pdata->timer_errata;
+
+        timer->irq = irq->start;
+        timer->pdev = pdev;
+
+        pm_runtime_enable(dev);
+        pm_runtime_irq_safe(dev);
+
+        if (!timer->reserved) {
+                ret = pm_runtime_get_sync(dev);
+                if (ret < 0) {
+                        dev_err(dev, "%s: pm_runtime_get_sync failed!\n",
+                                __func__);
+                        goto err_get_sync;
+                }
+                __omap_dm_timer_init_regs(timer);
+                pm_runtime_put(dev);
+        }
+
+        /* add the timer element to the list */
+        spin_lock_irqsave(&dm_timer_lock, flags);
+        list_add_tail(&timer->node, &omap_timer_list);
+        spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+        dev_dbg(dev, "Device Probed.\n");
+
+        return 0;
+
+err_get_sync:
+        pm_runtime_put_noidle(dev);
+        pm_runtime_disable(dev);
+        return ret;
+}
+
+/**
+ * omap_dm_timer_remove - cleanup a registered timer device
+ * @pdev:       pointer to current timer platform device
+ *
+ * Called by driver framework whenever a timer device is unregistered.
+ * In addition to freeing platform resources it also deletes the timer
+ * entry from the local list.
+ */
+static int omap_dm_timer_remove(struct platform_device *pdev)
+{
+        struct omap_dm_timer *timer;
+        unsigned long flags;
+        int ret = -EINVAL;
+
+        spin_lock_irqsave(&dm_timer_lock, flags);
+        list_for_each_entry(timer, &omap_timer_list, node)
+                if (!strcmp(dev_name(&timer->pdev->dev),
+                            dev_name(&pdev->dev))) {
+                        list_del(&timer->node);
+                        ret = 0;
+                        break;
+                }
+        spin_unlock_irqrestore(&dm_timer_lock, flags);
+
+        pm_runtime_disable(&pdev->dev);
+
+        return ret;
+}
+
+const static struct omap_dm_timer_ops dmtimer_ops = {
+        .request_by_node = omap_dm_timer_request_by_node,
+        .request_specific = omap_dm_timer_request_specific,
+        .request = omap_dm_timer_request,
+        .set_source = omap_dm_timer_set_source,
+        .get_irq = omap_dm_timer_get_irq,
+        .set_int_enable = omap_dm_timer_set_int_enable,
+        .set_int_disable = omap_dm_timer_set_int_disable,
+        .free = omap_dm_timer_free,
+        .enable = omap_dm_timer_enable,
+        .disable = omap_dm_timer_disable,
+        .get_fclk = omap_dm_timer_get_fclk,
+        .start = omap_dm_timer_start,
+        .stop = omap_dm_timer_stop,
+        .set_load = omap_dm_timer_set_load,
+        .set_match = omap_dm_timer_set_match,
+        .set_pwm = omap_dm_timer_set_pwm,
+        .set_prescaler = omap_dm_timer_set_prescaler,
+        .read_counter = omap_dm_timer_read_counter,
+        .write_counter = omap_dm_timer_write_counter,
+        .read_status = omap_dm_timer_read_status,
+        .write_status = omap_dm_timer_write_status,
+};
+
+static const struct dmtimer_platform_data omap3plus_pdata = {
+        .timer_errata = OMAP_TIMER_ERRATA_I103_I767,
+        .timer_ops = &dmtimer_ops,
+};
+
+static const struct of_device_id omap_timer_match[] = {
+        {
+                .compatible = "ti,omap2420-timer",
+        },
+        {
+                .compatible = "ti,omap3430-timer",
+                .data = &omap3plus_pdata,
+        },
+        {
+                .compatible = "ti,omap4430-timer",
+                .data = &omap3plus_pdata,
+        },
+        {
+                .compatible = "ti,omap5430-timer",
+                .data = &omap3plus_pdata,
+        },
+        {
+                .compatible = "ti,am335x-timer",
+                .data = &omap3plus_pdata,
+        },
+        {
+                .compatible = "ti,am335x-timer-1ms",
+                .data = &omap3plus_pdata,
+        },
+        {
+                .compatible = "ti,dm816-timer",
+                .data = &omap3plus_pdata,
+        },
+        {},
+};
+MODULE_DEVICE_TABLE(of, omap_timer_match);
+
+static struct platform_driver omap_dm_timer_driver = {
+        .probe  = omap_dm_timer_probe,
+        .remove = omap_dm_timer_remove,
+        .driver = {
+                .name   = "omap_timer",
+                .of_match_table = of_match_ptr(omap_timer_match),
+        },
+};
+
+early_platform_init("earlytimer", &omap_dm_timer_driver);
+module_platform_driver(omap_dm_timer_driver);
+
+MODULE_DESCRIPTION("OMAP Dual-Mode Timer Driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRIVER_NAME);
+MODULE_AUTHOR("Texas Instruments Inc");