rtc: rtc-at91sam9: convert at91_rtc_driver to dev_pm_ops

Instead of using legacy suspend/resume methods, using newer dev_pm_ops
structure allows better control over power management.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 10 insertions, 13 deletions

diff --git a/drivers/rtc/rtc-at91sam9.c b/drivers/rtc/rtc-at91sam9.c
index 7b77c27e0955..b60a34cb145a 100644
--- a/drivers/rtc/rtc-at91sam9.c
+++ b/drivers/rtc/rtc-at91sam9.c
@@ -404,14 +404,13 @@ static void at91_rtc_shutdown(struct platform_device *pdev)
         rtt_writel(rtc, MR, mr & ~rtc->imr);
 }
 
-#ifdef CONFIG_PM
+#ifdef CONFIG_PM_SLEEP
 
 /* AT91SAM9 RTC Power management control */
 
-static int at91_rtc_suspend(struct platform_device *pdev,
-                                        pm_message_t state)
+static int at91_rtc_suspend(struct device *dev)
 {
-        struct sam9_rtc *rtc = platform_get_drvdata(pdev);
+        struct sam9_rtc *rtc = dev_get_drvdata(dev);
         u32             mr = rtt_readl(rtc, MR);
 
         /*
@@ -420,7 +419,7 @@ static int at91_rtc_suspend(struct platform_device *pdev,
          */
         rtc->imr = mr & (AT91_RTT_ALMIEN | AT91_RTT_RTTINCIEN);
         if (rtc->imr) {
-                if (device_may_wakeup(&pdev->dev) && (mr & AT91_RTT_ALMIEN)) {
+                if (device_may_wakeup(dev) && (mr & AT91_RTT_ALMIEN)) {
                         enable_irq_wake(rtc->irq);
                         /* don't let RTTINC cause wakeups */
                         if (mr & AT91_RTT_RTTINCIEN)
@@ -432,13 +431,13 @@ static int at91_rtc_suspend(struct platform_device *pdev,
         return 0;
 }
 
-static int at91_rtc_resume(struct platform_device *pdev)
+static int at91_rtc_resume(struct device *dev)
 {
-        struct sam9_rtc *rtc = platform_get_drvdata(pdev);
+        struct sam9_rtc *rtc = dev_get_drvdata(dev);
         u32             mr;
 
         if (rtc->imr) {
-                if (device_may_wakeup(&pdev->dev))
+                if (device_may_wakeup(dev))
                         disable_irq_wake(rtc->irq);
                 mr = rtt_readl(rtc, MR);
                 rtt_writel(rtc, MR, mr | rtc->imr);
@@ -446,20 +445,18 @@ static int at91_rtc_resume(struct platform_device *pdev)
 
         return 0;
 }
-#else
-#define at91_rtc_suspend        NULL
-#define at91_rtc_resume         NULL
 #endif
 
+static SIMPLE_DEV_PM_OPS(at91_rtc_pm_ops, at91_rtc_suspend, at91_rtc_resume);
+
 static struct platform_driver at91_rtc_driver = {
         .probe          = at91_rtc_probe,
         .remove         = at91_rtc_remove,
         .shutdown       = at91_rtc_shutdown,
-        .suspend        = at91_rtc_suspend,
-        .resume         = at91_rtc_resume,
         .driver         = {
                 .name   = "rtc-at91sam9",
                 .owner  = THIS_MODULE,
+                .pm     = &at91_rtc_pm_ops,
         },
 };