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path: root/drivers/rtc
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Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-vr41xx.c28
1 files changed, 26 insertions, 2 deletions
diff --git a/drivers/rtc/rtc-vr41xx.c b/drivers/rtc/rtc-vr41xx.c
index e9f9c548946..af7596ef29e 100644
--- a/drivers/rtc/rtc-vr41xx.c
+++ b/drivers/rtc/rtc-vr41xx.c
@@ -97,6 +97,7 @@ static DEFINE_SPINLOCK(rtc_lock);
static char rtc_name[] = "RTC";
static unsigned long periodic_frequency;
static unsigned long periodic_count;
+static unsigned int alarm_enabled;
struct resource rtc_resource[2] = {
{ .name = rtc_name,
@@ -188,6 +189,7 @@ static int vr41xx_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
low = rtc1_read(ECMPLREG);
mid = rtc1_read(ECMPMREG);
high = rtc1_read(ECMPHREG);
+ wkalrm->enabled = alarm_enabled;
spin_unlock_irq(&rtc_lock);
@@ -206,10 +208,18 @@ static int vr41xx_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *wkalrm)
spin_lock_irq(&rtc_lock);
+ if (alarm_enabled)
+ disable_irq(ELAPSEDTIME_IRQ);
+
rtc1_write(ECMPLREG, (uint16_t)(alarm_sec << 15));
rtc1_write(ECMPMREG, (uint16_t)(alarm_sec >> 1));
rtc1_write(ECMPHREG, (uint16_t)(alarm_sec >> 17));
+ if (wkalrm->enabled)
+ enable_irq(ELAPSEDTIME_IRQ);
+
+ alarm_enabled = wkalrm->enabled;
+
spin_unlock_irq(&rtc_lock);
return 0;
@@ -221,10 +231,24 @@ static int vr41xx_rtc_ioctl(struct device *dev, unsigned int cmd, unsigned long
switch (cmd) {
case RTC_AIE_ON:
- enable_irq(ELAPSEDTIME_IRQ);
+ spin_lock_irq(&rtc_lock);
+
+ if (!alarm_enabled) {
+ enable_irq(ELAPSEDTIME_IRQ);
+ alarm_enabled = 1;
+ }
+
+ spin_unlock_irq(&rtc_lock);
break;
case RTC_AIE_OFF:
- disable_irq(ELAPSEDTIME_IRQ);
+ spin_lock_irq(&rtc_lock);
+
+ if (alarm_enabled) {
+ disable_irq(ELAPSEDTIME_IRQ);
+ alarm_enabled = 0;
+ }
+
+ spin_unlock_irq(&rtc_lock);
break;
case RTC_PIE_ON:
enable_irq(RTCLONG1_IRQ);