[PATCH v2 16/20] rtc: omap: enable wake-up from power off
From: johan@kernel.org (Johan Hovold)
Date: 2014-10-21 17:51:08
Also in:
linux-devicetree, linux-omap, lkml
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
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 | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index f6c93f877857..cb5ef3c845d1 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c@@ -687,8 +687,15 @@ static SIMPLE_DEV_PM_OPS(omap_rtc_pm_ops, omap_rtc_suspend, omap_rtc_resume); static void omap_rtc_shutdown(struct platform_device *pdev) { struct omap_rtc *rtc = platform_get_drvdata(pdev); + u8 mask; - rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, 0); + /* + * Keep the ALARM interrupt enabled to allow the system to power up on + * alarm events. + */ + mask = rtc_read(rtc, OMAP_RTC_INTERRUPTS_REG); + mask &= OMAP_RTC_INTERRUPTS_IT_ALARM; + rtc_write(rtc, OMAP_RTC_INTERRUPTS_REG, mask); } static struct platform_driver omap_rtc_driver = {
--
2.0.4