linux-kernel - [PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to suspending

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Date:	Mon, 12 Oct 2015 09:17:57 +0800
From:	Wenyou Yang <wenyou.yang@...el.com>
To:	Alessandro Zummo <a.zummo@...ertech.it>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
CC:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Ludovic Desroches <ludovic.desroches@...el.com>,
	<rtc-linux@...glegroups.com>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Wenyou Yang <wenyou.yang@...el.com>
Subject: [PATCH] rtc: at91rm9200: clear RTC alarm status flag prior to suspending

This patch is to clear the RTC alarm status flag prior to suspending
to avoid the erroneous wake-up activity.

Signed-off-by: Wenyou Yang <wenyou.yang@...el.com>
---

 drivers/rtc/rtc-at91rm9200.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/rtc/rtc-at91rm9200.c b/drivers/rtc/rtc-at91rm9200.c
index cb62e21..b60fd47 100644
--- a/drivers/rtc/rtc-at91rm9200.c
+++ b/drivers/rtc/rtc-at91rm9200.c
@@ -495,6 +495,8 @@ static int at91_rtc_suspend(struct device *dev)
 	/* this IRQ is shared with DBGU and other hardware which isn't
 	 * necessarily doing PM like we are...
 	 */
+	at91_rtc_write(AT91_RTC_SCCR, AT91_RTC_ALARM);
+
 	at91_rtc_imr = at91_rtc_read_imr()
 			& (AT91_RTC_ALARM|AT91_RTC_SECEV);
 	if (at91_rtc_imr) {
-- 
1.7.9.5

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