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path: root/drivers/rtc/rtc-ab8500.c
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Diffstat (limited to 'drivers/rtc/rtc-ab8500.c')
-rw-r--r--drivers/rtc/rtc-ab8500.c42
1 files changed, 25 insertions, 17 deletions
diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
index 370889d0489..bf3c2f669c3 100644
--- a/drivers/rtc/rtc-ab8500.c
+++ b/drivers/rtc/rtc-ab8500.c
@@ -89,22 +89,17 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
if (retval < 0)
return retval;
- /* Early AB8500 chips will not clear the rtc read request bit */
- if (abx500_get_chip_id(dev) == 0) {
- usleep_range(1000, 1000);
- } else {
- /* Wait for some cycles after enabling the rtc read in ab8500 */
- while (time_before(jiffies, timeout)) {
- retval = abx500_get_register_interruptible(dev,
- AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value);
- if (retval < 0)
- return retval;
-
- if (!(value & RTC_READ_REQUEST))
- break;
-
- usleep_range(1000, 5000);
- }
+ /* Wait for some cycles after enabling the rtc read in ab8500 */
+ while (time_before(jiffies, timeout)) {
+ retval = abx500_get_register_interruptible(dev,
+ AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value);
+ if (retval < 0)
+ return retval;
+
+ if (!(value & RTC_READ_REQUEST))
+ break;
+
+ usleep_range(1000, 5000);
}
/* Read the Watchtime registers */
@@ -225,7 +220,8 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
{
int retval, i;
unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
- unsigned long mins, secs = 0;
+ unsigned long mins, secs = 0, cursec = 0;
+ struct rtc_time curtm;
if (alarm->time.tm_year < (AB8500_RTC_EPOCH - 1900)) {
dev_dbg(dev, "year should be equal to or greater than %d\n",
@@ -237,6 +233,18 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
rtc_tm_to_time(&alarm->time, &secs);
/*
+ * Check whether alarm is set less than 1min.
+ * Since our RTC doesn't support alarm resolution less than 1min,
+ * return -EINVAL, so UIE EMUL can take it up, incase of UIE_ON
+ */
+ ab8500_rtc_read_time(dev, &curtm); /* Read current time */
+ rtc_tm_to_time(&curtm, &cursec);
+ if ((secs - cursec) < 59) {
+ dev_dbg(dev, "Alarm less than 1 minute not supported\r\n");
+ return -EINVAL;
+ }
+
+ /*
* Convert it to the number of seconds since 01-01-2000 00:00:00, since
* we only have a small counter in the RTC.
*/