[PATCH 10/12] rtc: omap: enable wake-up from power off

Johan Hovold
2014-10-09T19:12:33Z

The ALARM interrupt must not be disabled during shutdown in order to be
able to power up the system using an RTC alarm.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
drivers/rtc/rtc-omap.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index b0319864dd42..8836c58901b5 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -670,7 +670,15 @@ static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume);

static void omap_rtc_shutdown(struct platform_device *pdev)
{
- rtc_write(0, OMAP_RTC_INTERRUPTS_REG);
+ u8 mask;
+
+ /*
+ * Keep the ALARM interrupt enabled to allow the system to power up on
+ * alarm events.
+ */
+ mask = rtc_read(OMAP_RTC_INTERRUPTS_REG);
+ mask &= OMAP_RTC_INTERRUPTS_IT_ALARM;
+ rtc_write(mask, OMAP_RTC_INTERRUPTS_REG);
}

MODULE_ALIAS("platform:omap_rtc");
--
2.0.4