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authorJohan Hovold <johan@kernel.org>2014-12-11 02:53:16 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-11 04:41:14 +0300
commit8ad5c722d592ae1965195651965c02396b42fe1a (patch)
tree2da2c70ddd41d6d3eced2d484a194a03d83ef731 /drivers/rtc/rtc-omap.c
parent222a12fca6048249d9007f2a4c5fbcea532e8522 (diff)
downloadlinux-8ad5c722d592ae1965195651965c02396b42fe1a.tar.xz
rtc: omap: enable wake-up from power off
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> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Tony Lindgren <tony@atomide.com> Cc: Benot Cousson <bcousson@baylibre.com> Cc: Lokesh Vutla <lokeshvutla@ti.com> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Sekhar Nori <nsekhar@ti.com> Cc: Tero Kristo <t-kristo@ti.com> Cc: Keerthy J <j-keerthy@ti.com> Tested-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/rtc-omap.c')
-rw-r--r--drivers/rtc/rtc-omap.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/rtc/rtc-omap.c b/drivers/rtc/rtc-omap.c
index e83f51ae7f63..0dfb0404f867 100644
--- a/drivers/rtc/rtc-omap.c
+++ b/drivers/rtc/rtc-omap.c
@@ -694,8 +694,15 @@ 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 = {