rtc: omap: add device abstraction
authorJohan Hovold <johan@kernel.org>
Wed, 10 Dec 2014 23:52:55 +0000 (15:52 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Thu, 11 Dec 2014 01:41:13 +0000 (17:41 -0800)
Add struct omap_rtc to hold previously global data as well as the
IP-block feature flags.

Also convert the register-access macros to proper inline helper functions.

Signed-off-by: Johan Hovold <johan@kernel.org>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Benot Cousson <bcousson@baylibre.com>
Cc: Lokesh Vutla <lokeshvutla@ti.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Sekhar Nori <nsekhar@ti.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Keerthy J <j-keerthy@ti.com>
Tested-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
drivers/rtc/rtc-omap.c

index bdee29674589d6c2b8ae81e360e2df56affa44ab..1da610b8981f9b1b8f785379fe59f1e7ba1a06f0 100644 (file)
  */
 #define OMAP_RTC_HAS_32KCLK_EN         BIT(2)
 
-static void __iomem    *rtc_base;
+struct omap_rtc {
+       struct rtc_device *rtc;
+       void __iomem *base;
+       int irq_alarm;
+       int irq_timer;
+       u8 interrupts_reg;
+       unsigned long flags;
+};
 
-#define rtc_read(addr)         readb(rtc_base + (addr))
-#define rtc_write(val, addr)   writeb(val, rtc_base + (addr))
+static inline u8 rtc_read(struct omap_rtc *rtc, unsigned int reg)
+{
+       return readb(rtc->base + reg);
+}
 
-#define rtc_writel(val, addr)  writel(val, rtc_base + (addr))
+static inline void rtc_write(struct omap_rtc *rtc, unsigned int reg, u8 val)
+{
+       writeb(val, rtc->base + reg);
+}
 
+static inline void rtc_writel(struct omap_rtc *rtc, unsigned int reg, u32 val)
+{
+       writel(val, rtc->base + reg);
+}
 
 /* we rely on the rtc framework to handle locking (rtc->ops_lock),
  * so the only other requirement is that register accesses which
  * require BUSY to be clear are made with IRQs locally disabled
  */
-static void rtc_wait_not_busy(void)
+static void rtc_wait_not_busy(struct omap_rtc *rtc)
 {
        int     count = 0;
        u8      status;
 
        /* BUSY may stay active for 1/32768 second (~30 usec) */
        for (count = 0; count < 50; count++) {
-               status = rtc_read(OMAP_RTC_STATUS_REG);
+               status = rtc_read(rtc, OMAP_RTC_STATUS_REG);
                if ((status & (u8)OMAP_RTC_STATUS_BUSY) == 0)
                        break;
                udelay(1);
@@ -145,16 +161,17 @@ static void rtc_wait_not_busy(void)
        /* now we have ~15 usec to read/write various registers */
 }
 
-static irqreturn_t rtc_irq(int irq, void *rtc)
+static irqreturn_t rtc_irq(int irq, void *dev_id)
 {
+       struct omap_rtc         *rtc = dev_id;
        unsigned long           events = 0;
        u8                      irq_data;
 
-       irq_data = rtc_read(OMAP_RTC_STATUS_REG);
+       irq_data = rtc_read(rtc, OMAP_RTC_STATUS_REG);
 
        /* alarm irq? */
        if (irq_data & OMAP_RTC_STATUS_ALARM) {
-               rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
+               rtc_write(rtc, OMAP_RTC_STATUS_REG, OMAP_RTC_STATUS_ALARM);
                events |= RTC_IRQF | RTC_AF;
        }
 
@@ -162,23 +179,21 @@ static irqreturn_t rtc_irq(int irq, void *rtc)
        if (irq_data & OMAP_RTC_STATUS_1S_EVENT)
                events |= RTC_IRQF | RTC_UF;
 
-       rtc_update_irq(rtc, 1, events);
+       rtc_update_irq(rtc->rtc, 1, events);
 
        return IRQ_HANDLED;
 }
 
 static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
 {
+       struct omap_rtc *rtc = dev_get_drvdata(dev);
        u8 reg, irqwake_reg = 0;
-       struct platform_device *pdev = to_platform_device(dev);
-       const struct platform_device_id *id_entry =
-                                       platform_get_device_id(pdev);
 
        local_irq_disable();
-       rtc_wait_not_busy();
-       reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
-       if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
-               irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
+       rtc_wait_not_busy(rtc);
+       reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
+       if (rtc->flags & OMAP_RTC_HAS_IRQWAKEEN)
+               irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN);
 
        if (enabled) {
                reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
@@ -187,10 +202,10 @@ static int omap_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
                reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
                irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
        }
-       rtc_wait_not_busy();
-       rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
-       if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
-               rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
+       rtc_wait_not_busy(rtc);
+       rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg);
+       if (rtc->flags & OMAP_RTC_HAS_IRQWAKEEN)
+               rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg);
        local_irq_enable();
 
        return 0;
@@ -231,16 +246,18 @@ static void bcd2tm(struct rtc_time *tm)
 
 static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
 {
+       struct omap_rtc *rtc = dev_get_drvdata(dev);
+
        /* we don't report wday/yday/isdst ... */
        local_irq_disable();
-       rtc_wait_not_busy();
+       rtc_wait_not_busy(rtc);
 
-       tm->tm_sec = rtc_read(OMAP_RTC_SECONDS_REG);
-       tm->tm_min = rtc_read(OMAP_RTC_MINUTES_REG);
-       tm->tm_hour = rtc_read(OMAP_RTC_HOURS_REG);
-       tm->tm_mday = rtc_read(OMAP_RTC_DAYS_REG);
-       tm->tm_mon = rtc_read(OMAP_RTC_MONTHS_REG);
-       tm->tm_year = rtc_read(OMAP_RTC_YEARS_REG);
+       tm->tm_sec = rtc_read(rtc, OMAP_RTC_SECONDS_REG);
+       tm->tm_min = rtc_read(rtc, OMAP_RTC_MINUTES_REG);
+       tm->tm_hour = rtc_read(rtc, OMAP_RTC_HOURS_REG);
+       tm->tm_mday = rtc_read(rtc, OMAP_RTC_DAYS_REG);
+       tm->tm_mon = rtc_read(rtc, OMAP_RTC_MONTHS_REG);
+       tm->tm_year = rtc_read(rtc, OMAP_RTC_YEARS_REG);
 
        local_irq_enable();
 
@@ -250,17 +267,19 @@ static int omap_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
 static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
 {
+       struct omap_rtc *rtc = dev_get_drvdata(dev);
+
        if (tm2bcd(tm) < 0)
                return -EINVAL;
        local_irq_disable();
-       rtc_wait_not_busy();
+       rtc_wait_not_busy(rtc);
 
-       rtc_write(tm->tm_year, OMAP_RTC_YEARS_REG);
-       rtc_write(tm->tm_mon, OMAP_RTC_MONTHS_REG);
-       rtc_write(tm->tm_mday, OMAP_RTC_DAYS_REG);
-       rtc_write(tm->tm_hour, OMAP_RTC_HOURS_REG);
-       rtc_write(tm->tm_min, OMAP_RTC_MINUTES_REG);
-       rtc_write(tm->tm_sec, OMAP_RTC_SECONDS_REG);
+       rtc_write(rtc, OMAP_RTC_YEARS_REG, tm->tm_year);
+       rtc_write(rtc, OMAP_RTC_MONTHS_REG, tm->tm_mon);
+       rtc_write(rtc, OMAP_RTC_DAYS_REG, tm->tm_mday);
+       rtc_write(rtc, OMAP_RTC_HOURS_REG, tm->tm_hour);
+       rtc_write(rtc, OMAP_RTC_MINUTES_REG, tm->tm_min);
+       rtc_write(rtc, OMAP_RTC_SECONDS_REG, tm->tm_sec);
 
        local_irq_enable();
 
@@ -269,20 +288,22 @@ static int omap_rtc_set_time(struct device *dev, struct rtc_time *tm)
 
 static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 {
+       struct omap_rtc *rtc = dev_get_drvdata(dev);
+
        local_irq_disable();
-       rtc_wait_not_busy();
+       rtc_wait_not_busy(rtc);
 
-       alm->time.tm_sec = rtc_read(OMAP_RTC_ALARM_SECONDS_REG);
-       alm->time.tm_min = rtc_read(OMAP_RTC_ALARM_MINUTES_REG);
-       alm->time.tm_hour = rtc_read(OMAP_RTC_ALARM_HOURS_REG);
-       alm->time.tm_mday = rtc_read(OMAP_RTC_ALARM_DAYS_REG);
-       alm->time.tm_mon = rtc_read(OMAP_RTC_ALARM_MONTHS_REG);
-       alm->time.tm_year = rtc_read(OMAP_RTC_ALARM_YEARS_REG);
+       alm->time.tm_sec = rtc_read(rtc, OMAP_RTC_ALARM_SECONDS_REG);
+       alm->time.tm_min = rtc_read(rtc, OMAP_RTC_ALARM_MINUTES_REG);
+       alm->time.tm_hour = rtc_read(rtc, OMAP_RTC_ALARM_HOURS_REG);
+       alm->time.tm_mday = rtc_read(rtc, OMAP_RTC_ALARM_DAYS_REG);
+       alm->time.tm_mon = rtc_read(rtc, OMAP_RTC_ALARM_MONTHS_REG);
+       alm->time.tm_year = rtc_read(rtc, OMAP_RTC_ALARM_YEARS_REG);
 
        local_irq_enable();
 
        bcd2tm(&alm->time);
-       alm->enabled = !!(rtc_read(OMAP_RTC_INTERRUPTS_REG)
+       alm->enabled = !!(rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG)
                        & OMAP_RTC_INTERRUPTS_IT_ALARM);
 
        return 0;
@@ -290,27 +311,25 @@ static int omap_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
 
 static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
 {
+       struct omap_rtc *rtc = dev_get_drvdata(dev);
        u8 reg, irqwake_reg = 0;
-       struct platform_device *pdev = to_platform_device(dev);
-       const struct platform_device_id *id_entry =
-                                       platform_get_device_id(pdev);
 
        if (tm2bcd(&alm->time) < 0)
                return -EINVAL;
 
        local_irq_disable();
-       rtc_wait_not_busy();
+       rtc_wait_not_busy(rtc);
 
-       rtc_write(alm->time.tm_year, OMAP_RTC_ALARM_YEARS_REG);
-       rtc_write(alm->time.tm_mon, OMAP_RTC_ALARM_MONTHS_REG);
-       rtc_write(alm->time.tm_mday, OMAP_RTC_ALARM_DAYS_REG);
-       rtc_write(alm->time.tm_hour, OMAP_RTC_ALARM_HOURS_REG);
-       rtc_write(alm->time.tm_min, OMAP_RTC_ALARM_MINUTES_REG);
-       rtc_write(alm->time.tm_sec, OMAP_RTC_ALARM_SECONDS_REG);
+       rtc_write(rtc, OMAP_RTC_ALARM_YEARS_REG, alm->time.tm_year);
+       rtc_write(rtc, OMAP_RTC_ALARM_MONTHS_REG, alm->time.tm_mon);
+       rtc_write(rtc, OMAP_RTC_ALARM_DAYS_REG, alm->time.tm_mday);
+       rtc_write(rtc, OMAP_RTC_ALARM_HOURS_REG, alm->time.tm_hour);
+       rtc_write(rtc, OMAP_RTC_ALARM_MINUTES_REG, alm->time.tm_min);
+       rtc_write(rtc, OMAP_RTC_ALARM_SECONDS_REG, alm->time.tm_sec);
 
-       reg = rtc_read(OMAP_RTC_INTERRUPTS_REG);
-       if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
-               irqwake_reg = rtc_read(OMAP_RTC_IRQWAKEEN);
+       reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
+       if (rtc->flags & OMAP_RTC_HAS_IRQWAKEEN)
+               irqwake_reg = rtc_read(rtc, OMAP_RTC_IRQWAKEEN);
 
        if (alm->enabled) {
                reg |= OMAP_RTC_INTERRUPTS_IT_ALARM;
@@ -319,9 +338,9 @@ static int omap_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
                reg &= ~OMAP_RTC_INTERRUPTS_IT_ALARM;
                irqwake_reg &= ~OMAP_RTC_IRQWAKEEN_ALARM_WAKEEN;
        }
-       rtc_write(reg, OMAP_RTC_INTERRUPTS_REG);
-       if (id_entry->driver_data & OMAP_RTC_HAS_IRQWAKEEN)
-               rtc_write(irqwake_reg, OMAP_RTC_IRQWAKEEN);
+       rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, reg);
+       if (rtc->flags & OMAP_RTC_HAS_IRQWAKEEN)
+               rtc_write(rtc, OMAP_RTC_IRQWAKEEN, irqwake_reg);
 
        local_irq_enable();
 
@@ -336,9 +355,6 @@ static struct rtc_class_ops omap_rtc_ops = {
        .alarm_irq_enable = omap_rtc_alarm_irq_enable,
 };
 
-static int omap_rtc_alarm;
-static int omap_rtc_timer;
-
 #define        OMAP_RTC_DATA_AM3352_IDX        1
 #define        OMAP_RTC_DATA_DA830_IDX         2
 
@@ -372,13 +388,17 @@ MODULE_DEVICE_TABLE(of, omap_rtc_of_match);
 
 static int __init omap_rtc_probe(struct platform_device *pdev)
 {
+       struct omap_rtc         *rtc;
        struct resource         *res;
-       struct rtc_device       *rtc;
        u8                      reg, new_ctrl;
        const struct platform_device_id *id_entry;
        const struct of_device_id *of_id;
        int ret;
 
+       rtc = devm_kzalloc(&pdev->dev, sizeof(*rtc), GFP_KERNEL);
+       if (!rtc)
+               return -ENOMEM;
+
        of_id = of_match_device(omap_rtc_of_match, &pdev->dev);
        if (of_id)
                pdev->id_entry = of_id->data;
@@ -389,26 +409,30 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                return -ENODEV;
        }
 
-       omap_rtc_timer = platform_get_irq(pdev, 0);
-       if (omap_rtc_timer <= 0)
+       rtc->flags = id_entry->driver_data;
+
+       rtc->irq_timer = platform_get_irq(pdev, 0);
+       if (rtc->irq_timer <= 0)
                return -ENOENT;
 
-       omap_rtc_alarm = platform_get_irq(pdev, 1);
-       if (omap_rtc_alarm <= 0)
+       rtc->irq_alarm = platform_get_irq(pdev, 1);
+       if (rtc->irq_alarm <= 0)
                return -ENOENT;
 
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       rtc_base = devm_ioremap_resource(&pdev->dev, res);
-       if (IS_ERR(rtc_base))
-               return PTR_ERR(rtc_base);
+       rtc->base = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(rtc->base))
+               return PTR_ERR(rtc->base);
+
+       platform_set_drvdata(pdev, rtc);
 
        /* Enable the clock/module so that we can access the registers */
        pm_runtime_enable(&pdev->dev);
        pm_runtime_get_sync(&pdev->dev);
 
-       if (id_entry->driver_data & OMAP_RTC_HAS_KICKER) {
-               rtc_writel(KICK0_VALUE, OMAP_RTC_KICK0_REG);
-               rtc_writel(KICK1_VALUE, OMAP_RTC_KICK1_REG);
+       if (rtc->flags & OMAP_RTC_HAS_KICKER) {
+               rtc_writel(rtc, OMAP_RTC_KICK0_REG, KICK0_VALUE);
+               rtc_writel(rtc, OMAP_RTC_KICK1_REG, KICK1_VALUE);
        }
 
        /*
@@ -416,25 +440,26 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
         *
         * NOTE: ALARM2 is not cleared on AM3352 if rtc_write (writeb) is used
         */
-       rtc_writel(0, OMAP_RTC_INTERRUPTS_REG);
+       rtc_writel(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
 
        /* enable RTC functional clock */
-       if (id_entry->driver_data & OMAP_RTC_HAS_32KCLK_EN) {
-               reg = rtc_read(OMAP_RTC_OSC_REG);
-               rtc_writel(reg | OMAP_RTC_OSC_32KCLK_EN, OMAP_RTC_OSC_REG);
+       if (rtc->flags & OMAP_RTC_HAS_32KCLK_EN) {
+               reg = rtc_read(rtc, OMAP_RTC_OSC_REG);
+               rtc_writel(rtc, OMAP_RTC_OSC_REG,
+                               reg | OMAP_RTC_OSC_32KCLK_EN);
        }
 
        /* clear old status */
-       reg = rtc_read(OMAP_RTC_STATUS_REG);
+       reg = rtc_read(rtc, OMAP_RTC_STATUS_REG);
        if (reg & (u8) OMAP_RTC_STATUS_POWER_UP) {
                dev_info(&pdev->dev, "RTC power up reset detected\n");
-               rtc_write(OMAP_RTC_STATUS_POWER_UP, OMAP_RTC_STATUS_REG);
+               rtc_write(rtc, OMAP_RTC_STATUS_REG, OMAP_RTC_STATUS_POWER_UP);
        }
        if (reg & (u8) OMAP_RTC_STATUS_ALARM)
-               rtc_write(OMAP_RTC_STATUS_ALARM, OMAP_RTC_STATUS_REG);
+               rtc_write(rtc, OMAP_RTC_STATUS_REG, OMAP_RTC_STATUS_ALARM);
 
        /* On boards with split power, RTC_ON_NOFF won't reset the RTC */
-       reg = rtc_read(OMAP_RTC_CTRL_REG);
+       reg = rtc_read(rtc, OMAP_RTC_CTRL_REG);
        if (reg & (u8) OMAP_RTC_CTRL_STOP)
                dev_info(&pdev->dev, "already running\n");
 
@@ -460,27 +485,26 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
                dev_info(&pdev->dev, "split power mode\n");
 
        if (reg != new_ctrl)
-               rtc_write(new_ctrl, OMAP_RTC_CTRL_REG);
+               rtc_write(rtc, OMAP_RTC_CTRL_REG, new_ctrl);
 
        device_init_wakeup(&pdev->dev, true);
 
-       rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
+       rtc->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
                        &omap_rtc_ops, THIS_MODULE);
-       if (IS_ERR(rtc)) {
-               ret = PTR_ERR(rtc);
+       if (IS_ERR(rtc->rtc)) {
+               ret = PTR_ERR(rtc->rtc);
                goto err;
        }
-       platform_set_drvdata(pdev, rtc);
 
        /* handle periodic and alarm irqs */
-       ret = devm_request_irq(&pdev->dev, omap_rtc_timer, rtc_irq, 0,
-                       dev_name(&rtc->dev), rtc);
+       ret = devm_request_irq(&pdev->dev, rtc->irq_timer, rtc_irq, 0,
+                       dev_name(&rtc->rtc->dev), rtc);
        if (ret)
                goto err;
 
-       if (omap_rtc_timer != omap_rtc_alarm) {
-               ret = devm_request_irq(&pdev->dev, omap_rtc_alarm, rtc_irq, 0,
-                               dev_name(&rtc->dev), rtc);
+       if (rtc->irq_timer != rtc->irq_alarm) {
+               ret = devm_request_irq(&pdev->dev, rtc->irq_alarm, rtc_irq, 0,
+                               dev_name(&rtc->rtc->dev), rtc);
                if (ret)
                        goto err;
        }
@@ -489,8 +513,8 @@ static int __init omap_rtc_probe(struct platform_device *pdev)
 
 err:
        device_init_wakeup(&pdev->dev, false);
-       if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
-               rtc_writel(0, OMAP_RTC_KICK0_REG);
+       if (rtc->flags & OMAP_RTC_HAS_KICKER)
+               rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0);
        pm_runtime_put_sync(&pdev->dev);
        pm_runtime_disable(&pdev->dev);
 
@@ -499,16 +523,15 @@ err:
 
 static int __exit omap_rtc_remove(struct platform_device *pdev)
 {
-       const struct platform_device_id *id_entry =
-                               platform_get_device_id(pdev);
+       struct omap_rtc *rtc = platform_get_drvdata(pdev);
 
        device_init_wakeup(&pdev->dev, 0);
 
        /* leave rtc running, but disable irqs */
-       rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+       rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
 
-       if (id_entry->driver_data & OMAP_RTC_HAS_KICKER)
-               rtc_writel(0, OMAP_RTC_KICK0_REG);
+       if (rtc->flags & OMAP_RTC_HAS_KICKER)
+               rtc_writel(rtc, OMAP_RTC_KICK0_REG, 0);
 
        /* Disable the clock/module */
        pm_runtime_put_sync(&pdev->dev);
@@ -518,20 +541,20 @@ static int __exit omap_rtc_remove(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_PM_SLEEP
-static u8 irqstat;
-
 static int omap_rtc_suspend(struct device *dev)
 {
-       irqstat = rtc_read(OMAP_RTC_INTERRUPTS_REG);
+       struct omap_rtc *rtc = dev_get_drvdata(dev);
+
+       rtc->interrupts_reg = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG);
 
        /* FIXME the RTC alarm is not currently acting as a wakeup event
         * source on some platforms, and in fact this enable() call is just
         * saving a flag that's never used...
         */
        if (device_may_wakeup(dev))
-               enable_irq_wake(omap_rtc_alarm);
+               enable_irq_wake(rtc->irq_alarm);
        else
-               rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+               rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
 
        /* Disable the clock/module */
        pm_runtime_put_sync(dev);
@@ -541,13 +564,15 @@ static int omap_rtc_suspend(struct device *dev)
 
 static int omap_rtc_resume(struct device *dev)
 {
+       struct omap_rtc *rtc = dev_get_drvdata(dev);
+
        /* Enable the clock/module so that we can access the registers */
        pm_runtime_get_sync(dev);
 
        if (device_may_wakeup(dev))
-               disable_irq_wake(omap_rtc_alarm);
+               disable_irq_wake(rtc->irq_alarm);
        else
-               rtc_write(irqstat, OMAP_RTC_INTERRUPTS_REG);
+               rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, rtc->interrupts_reg);
 
        return 0;
 }
@@ -557,7 +582,9 @@ 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);
+       struct omap_rtc *rtc = platform_get_drvdata(pdev);
+
+       rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0);
 }
 
 MODULE_ALIAS("platform:omap_rtc");