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[3/6,RFC] rtc: rtc-cmos: Add pm_stay_awake/pm_relax calls around IRQ

Message ID 1316827963-13122-4-git-send-email-john.stultz@linaro.org
State RFC
Headers show

Commit Message

John Stultz Sept. 24, 2011, 1:32 a.m. UTC 
Flag the rtc-cmos IRQ event as a wakeup event using pm_stay_awake
and pm_relax()

Signed-off-by: John Stultz <john.stultz@linaro.org>
---
 drivers/rtc/rtc-cmos.c |   13 +++++++++++--
 1 files changed, 11 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/rtc/rtc-cmos.c b/drivers/rtc/rtc-cmos.c
index 05beb6c..1cc4688 100644
--- a/drivers/rtc/rtc-cmos.c
+++ b/drivers/rtc/rtc-cmos.c
@@ -538,11 +538,15 @@  static struct bin_attribute nvram = {
 
 static struct cmos_rtc	cmos_rtc;
 
+static struct wakeup_source *rtc_cmos_wakelock;
+
 static irqreturn_t cmos_interrupt(int irq, void *p)
 {
 	u8		irqstat;
 	u8		rtc_control;
 
+	__pm_stay_awake(rtc_cmos_wakelock);
+
 	spin_lock(&rtc_lock);
 
 	/* When the HPET interrupt handler calls us, the interrupt
@@ -573,9 +577,12 @@  static irqreturn_t cmos_interrupt(int irq, void *p)
 
 	if (is_intr(irqstat)) {
 		rtc_update_irq(p, 1, irqstat);
+		__pm_relax(rtc_cmos_wakelock);
 		return IRQ_HANDLED;
-	} else
-		return IRQ_NONE;
+	}
+
+	__pm_relax(rtc_cmos_wakelock);
+	return IRQ_NONE;
 }
 
 #ifdef	CONFIG_PNP
@@ -1153,6 +1160,8 @@  static int __init cmos_init(void)
 {
 	int retval = 0;
 
+	rtc_cmos_wakelock = wakeup_source_register("rtc_cmos");
+
 #ifdef	CONFIG_PNP
 	retval = pnp_register_driver(&cmos_pnp_driver);
 	if (retval == 0)