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authorWerner Almesberger <werner@openmoko.org>2009-10-06 02:02:09 +0400
committerPaul Fertser <fercerpav@gmail.com>2009-10-07 19:06:59 +0400
commit13cf28420add5afe68feb59dde5ef2f3c512cb17 (patch)
tree17c15bbd514e3b49f264fbff236cd18b999f2df8 /drivers
parentf1763f03f915a694754c8b618ed29193c67b71e8 (diff)
rtc: pcf50633: manage RTC alarm "pending" flag
This patch adds setting and clearing of the "pending" flag of the RTC alarm. The semantics follow the UEFI specification 2.2 available at http://www.uefi.org/specs/, i.e., the "pending" flag is cleared by disabling the alarm, but not by any other condition (such as the passing of time, a successful wakeup, or setting of a new alarm.) Signed-off-by: Werner Almesberger <werner@openmoko.org> Signed-off-by: Paul Fertser <fercerpav@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/rtc/rtc-pcf50633.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-pcf50633.c b/drivers/rtc/rtc-pcf50633.c
index 33a10c47260..8669815a17b 100644
--- a/drivers/rtc/rtc-pcf50633.c
+++ b/drivers/rtc/rtc-pcf50633.c
@@ -58,6 +58,7 @@ struct pcf50633_time {
struct pcf50633_rtc {
int alarm_enabled;
int second_enabled;
+ int alarm_pending;
struct pcf50633 *pcf;
struct rtc_device *rtc_dev;
@@ -209,6 +210,7 @@ static int pcf50633_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
rtc = dev_get_drvdata(dev);
alrm->enabled = rtc->alarm_enabled;
+ alrm->pending = rtc->alarm_pending;
ret = pcf50633_read_block(rtc->pcf, PCF50633_REG_RTCSCA,
PCF50633_TI_EXTENT, &pcf_tm.time[0]);
@@ -244,6 +246,8 @@ static int pcf50633_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
/* Returns 0 on success */
ret = pcf50633_write_block(rtc->pcf, PCF50633_REG_RTCSCA,
PCF50633_TI_EXTENT, &pcf_tm.time[0]);
+ if (!alrm->enabled)
+ rtc->alarm_pending = 0;
if (!alarm_masked || alrm->enabled)
pcf50633_irq_unmask(rtc->pcf, PCF50633_IRQ_ALARM);
@@ -268,6 +272,7 @@ static void pcf50633_rtc_irq(int irq, void *data)
switch (irq) {
case PCF50633_IRQ_ALARM:
rtc_update_irq(rtc->rtc_dev, 1, RTC_AF | RTC_IRQF);
+ rtc->alarm_pending = 1;
break;
case PCF50633_IRQ_SECOND:
rtc_update_irq(rtc->rtc_dev, 1, RTC_UF | RTC_IRQF);