rtc: rtc-sh: use set_irq_wake()

Modify the sh_rtc driver to use set_irq_wake() during suspend
and resume. These functions are used to enable the rtc interrupts
in the interrupt controller so the rtc can be used to wakeup the
system from suspend.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/drivers/rtc/rtc-sh.c b/drivers/rtc/rtc-sh.c
index 4898f7fe851..9b1ff12bf94 100644
--- a/drivers/rtc/rtc-sh.c
+++ b/drivers/rtc/rtc-sh.c
@@ -795,10 +795,46 @@ static int __devexit sh_rtc_remove(struct platform_device *pdev)
 
         return 0;
 }
+
+static void sh_rtc_set_irq_wake(struct device *dev, int enabled)
+{
+        struct platform_device *pdev = to_platform_device(dev);
+        struct sh_rtc *rtc = platform_get_drvdata(pdev);
+
+        set_irq_wake(rtc->periodic_irq, enabled);
+        if (rtc->carry_irq > 0) {
+                set_irq_wake(rtc->carry_irq, enabled);
+                set_irq_wake(rtc->alarm_irq, enabled);
+        }
+
+}
+
+static int sh_rtc_suspend(struct device *dev)
+{
+        if (device_may_wakeup(dev))
+                sh_rtc_set_irq_wake(dev, 1);
+
+        return 0;
+}
+
+static int sh_rtc_resume(struct device *dev)
+{
+        if (device_may_wakeup(dev))
+                sh_rtc_set_irq_wake(dev, 0);
+
+        return 0;
+}
+
+static struct dev_pm_ops sh_rtc_dev_pm_ops = {
+        .suspend = sh_rtc_suspend,
+        .resume = sh_rtc_resume,
+};
+
 static struct platform_driver sh_rtc_platform_driver = {
         .driver         = {
                 .name   = DRV_NAME,
                 .owner  = THIS_MODULE,
+                .pm     = &sh_rtc_dev_pm_ops,
         },
         .probe          = sh_rtc_probe,
         .remove         = __devexit_p(sh_rtc_remove),