[PATCH v2 4/5] rtc: s5m: Enable IRQ wake during suspend

[Krzysztof Kozlowski]

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@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
 drivers/rtc/rtc-s5m.c |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/rtc/rtc-s5m.c b/drivers/rtc/rtc-s5m.c
index 51471c1..ae8119d 100644
--- 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,
-- 
1.7.9.5

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