rtc: s5m: enable IRQ wake during suspend

Add PM suspend/resume ops to rtc-s5m driver and enable IRQ wake during
suspend so the RTC would act like a wake up source.  This allows waking
up from suspend to RAM on RTC alarm interrupt.

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Mark Brown <broonie@linaro.org>
Acked-by: Sangbeom Kim <sbkim73@samsung.com>
Cc: Samuel Ortiz <sameo@linux.intel.com>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
index 977b40cd32a77808edf5305bf08cb57d0ee747ee..0ba56b7cb3823d61b88ae442f73841bd6b014d05 100644 (file)
--- a/drivers/rtc/rtc-s5m.c
+++ b/drivers/rtc/rtc-s5m.c
@@ -639,6 +639,30 @@ static void s5m_rtc_shutdown(struct platform_device *pdev)
        s5m_rtc_enable_smpl(info, false);
 }
 
+static int s5m_rtc_resume(struct device *dev)
+{
+       struct s5m_rtc_info *info = dev_get_drvdata(dev);
+       int ret = 0;
+
+       if (device_may_wakeup(dev))
+               ret = disable_irq_wake(info->irq);
+
+       return ret;
+}
+
+static int s5m_rtc_suspend(struct device *dev)
+{
+       struct s5m_rtc_info *info = dev_get_drvdata(dev);
+       int ret = 0;
+
+       if (device_may_wakeup(dev))
+               ret = enable_irq_wake(info->irq);
+
+       return ret;
+}
+
+static SIMPLE_DEV_PM_OPS(s5m_rtc_pm_ops, s5m_rtc_suspend, s5m_rtc_resume);
+
 static const struct platform_device_id s5m_rtc_id[] = {
        { "s5m-rtc", 0 },
 };
@@ -647,6 +671,7 @@ static struct platform_driver s5m_rtc_driver = {
        .driver         = {
                .name   = "s5m-rtc",
                .owner  = THIS_MODULE,
+               .pm     = &s5m_rtc_pm_ops,
        },
        .probe          = s5m_rtc_probe,
        .shutdown       = s5m_rtc_shutdown,