| From | Johan Hovold <> | Subject | [PATCH 10/12] rtc: omap: enable wake-up from power off | Date | Thu, 9 Oct 2014 21:06:32 +0200 |
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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
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