rtc: max8925: Add function to work as wakeup source

Signed-off-by: Kevin Liu <kliu5@marvell.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-max8925.c b/drivers/rtc/rtc-max8925.c
index 3bc046f427e0..b281baead658 100644
--- a/drivers/rtc/rtc-max8925.c
+++ b/drivers/rtc/rtc-max8925.c
@@ -261,6 +261,8 @@ static int __devinit max8925_rtc_probe(struct platform_device *pdev)
         /* XXX - isn't this redundant? */
         platform_set_drvdata(pdev, info);
 
+        device_init_wakeup(&pdev->dev, 1);
+
         info->rtc_dev = rtc_device_register("max8925-rtc", &pdev->dev,
                                         &max8925_rtc_ops, THIS_MODULE);
         ret = PTR_ERR(info->rtc_dev);
@@ -290,10 +292,34 @@ static int __devexit max8925_rtc_remove(struct platform_device *pdev)
         return 0;
 }
 
+#ifdef CONFIG_PM_SLEEP
+static int max8925_rtc_suspend(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
+
+        if (device_may_wakeup(dev))
+                chip->wakeup_flag |= 1 << MAX8925_IRQ_RTC_ALARM0;
+        return 0;
+}
+static int max8925_rtc_resume(struct device *dev)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct max8925_chip *chip = dev_get_drvdata(pdev->dev.parent);
+
+        if (device_may_wakeup(dev))
+                chip->wakeup_flag &= ~(1 << MAX8925_IRQ_RTC_ALARM0);
+        return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(max8925_rtc_pm_ops, max8925_rtc_suspend, max8925_rtc_resume);
+
 static struct platform_driver max8925_rtc_driver = {
         .driver         = {
                 .name   = "max8925-rtc",
                 .owner  = THIS_MODULE,
+                .pm     = &max8925_rtc_pm_ops,
         },
         .probe          = max8925_rtc_probe,
         .remove         = __devexit_p(max8925_rtc_remove),