diff options
Diffstat (limited to 'drivers/rtc/rtc-ds1511.c')
| -rw-r--r-- | drivers/rtc/rtc-ds1511.c | 52 |
1 files changed, 23 insertions, 29 deletions
diff --git a/drivers/rtc/rtc-ds1511.c b/drivers/rtc/rtc-ds1511.c index 4ac8988d4124..b0dfdda2c8fc 100644 --- a/drivers/rtc/rtc-ds1511.c +++ b/drivers/rtc/rtc-ds1511.c @@ -178,35 +178,15 @@ static int ds1511_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm) return 0; } -/* - * write the alarm register settings - * - * we only have the use to interrupt every second, otherwise - * known as the update interrupt, or the interrupt if the whole - * date/hours/mins/secs matches. the ds1511 has many more - * permutations, but the kernel doesn't. - */ -static void ds1511_rtc_update_alarm(struct rtc_plat_data *pdata) +static void ds1511_rtc_alarm_enable(unsigned int enabled) { - unsigned long flags; - - spin_lock_irqsave(&pdata->lock, flags); - rtc_write(pdata->alrm_mday < 0 ? 0x80 : bin2bcd(pdata->alrm_mday) & 0x3f, - DS1511_AM4_DATE); - rtc_write(pdata->alrm_hour < 0 ? 0x80 : bin2bcd(pdata->alrm_hour) & 0x3f, - DS1511_AM3_HOUR); - rtc_write(pdata->alrm_min < 0 ? 0x80 : bin2bcd(pdata->alrm_min) & 0x7f, - DS1511_AM2_MIN); - rtc_write(pdata->alrm_sec < 0 ? 0x80 : bin2bcd(pdata->alrm_sec) & 0x7f, - DS1511_AM1_SEC); - rtc_write(rtc_read(DS1511_CONTROL_B) | (pdata->irqen ? DS1511_TIE : 0), DS1511_CONTROL_B); - rtc_read(DS1511_CONTROL_A); /* clear interrupts */ - spin_unlock_irqrestore(&pdata->lock, flags); + rtc_write(rtc_read(DS1511_CONTROL_B) | (enabled ? DS1511_TIE : 0), DS1511_CONTROL_B); } static int ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) { struct rtc_plat_data *pdata = dev_get_drvdata(dev); + unsigned long flags; if (pdata->irq <= 0) return -EINVAL; @@ -218,7 +198,20 @@ static int ds1511_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm) if (alrm->enabled) pdata->irqen |= RTC_AF; - ds1511_rtc_update_alarm(pdata); + spin_lock_irqsave(&pdata->lock, flags); + rtc_write(pdata->alrm_mday < 0 ? 0x80 : bin2bcd(pdata->alrm_mday) & 0x3f, + DS1511_AM4_DATE); + rtc_write(pdata->alrm_hour < 0 ? 0x80 : bin2bcd(pdata->alrm_hour) & 0x3f, + DS1511_AM3_HOUR); + rtc_write(pdata->alrm_min < 0 ? 0x80 : bin2bcd(pdata->alrm_min) & 0x7f, + DS1511_AM2_MIN); + rtc_write(pdata->alrm_sec < 0 ? 0x80 : bin2bcd(pdata->alrm_sec) & 0x7f, + DS1511_AM1_SEC); + ds1511_rtc_alarm_enable(alrm->enabled); + + rtc_read(DS1511_CONTROL_A); /* clear interrupts */ + spin_unlock_irqrestore(&pdata->lock, flags); + return 0; } @@ -258,14 +251,15 @@ static irqreturn_t ds1511_interrupt(int irq, void *dev_id) static int ds1511_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) { struct rtc_plat_data *pdata = dev_get_drvdata(dev); + unsigned long flags; if (pdata->irq <= 0) return -EINVAL; - if (enabled) - pdata->irqen |= RTC_AF; - else - pdata->irqen &= ~RTC_AF; - ds1511_rtc_update_alarm(pdata); + + spin_lock_irqsave(&pdata->lock, flags); + ds1511_rtc_alarm_enable(enabled); + spin_unlock_irqrestore(&pdata->lock, flags); + return 0; } |