diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-ab8500.c | 53 |
1 files changed, 4 insertions, 49 deletions
diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c index e97015e5c63e..2e2671b84ab0 100644 --- a/drivers/rtc/rtc-ab8500.c +++ b/drivers/rtc/rtc-ab8500.c @@ -46,7 +46,6 @@ #define RTC_STATUS_DATA 0x01 #define COUNTS_PER_SEC (0xF000 / 60) -#define AB8500_RTC_EPOCH 2000 static const u8 ab8500_rtc_time_regs[] = { AB8500_RTC_WATCH_TMIN_HI_REG, AB8500_RTC_WATCH_TMIN_MID_REG, @@ -59,23 +58,6 @@ static const u8 ab8500_rtc_alarm_regs[] = { AB8500_RTC_ALRM_MIN_LOW_REG }; -/* Calculate the seconds from 1970 to 01-01-2000 00:00:00 */ -static unsigned long get_elapsed_seconds(int year) -{ - unsigned long secs; - struct rtc_time tm = { - .tm_year = year - 1900, - .tm_mday = 1, - }; - - /* - * This function calculates secs from 1970 and not from - * 1900, even if we supply the offset from year 1900. - */ - rtc_tm_to_time(&tm, &secs); - return secs; -} - static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm) { unsigned long timeout = jiffies + HZ; @@ -118,9 +100,6 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm) secs = secs / COUNTS_PER_SEC; secs = secs + (mins * 60); - /* Add back the initially subtracted number of seconds */ - secs += get_elapsed_seconds(AB8500_RTC_EPOCH); - rtc_time_to_tm(secs, tm); return 0; } @@ -131,21 +110,8 @@ static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm) unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)]; unsigned long no_secs, no_mins, secs = 0; - if (tm->tm_year < (AB8500_RTC_EPOCH - 1900)) { - dev_dbg(dev, "year should be equal to or greater than %d\n", - AB8500_RTC_EPOCH); - return -EINVAL; - } - - /* Get the number of seconds since 1970 */ rtc_tm_to_time(tm, &secs); - /* - * Convert it to the number of seconds since 01-01-2000 00:00:00, since - * we only have a small counter in the RTC. - */ - secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); - no_mins = secs / 60; no_secs = secs % 60; @@ -202,9 +168,6 @@ static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm) mins = (buf[0] << 16) | (buf[1] << 8) | (buf[2]); secs = mins * 60; - /* Add back the initially subtracted number of seconds */ - secs += get_elapsed_seconds(AB8500_RTC_EPOCH); - rtc_time_to_tm(secs, &alarm->time); return rtc_valid_tm(&alarm->time); @@ -224,12 +187,6 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) 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", - AB8500_RTC_EPOCH); - return -EINVAL; - } - /* Get the number of seconds since 1970 */ rtc_tm_to_time(&alarm->time, &secs); @@ -245,12 +202,6 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm) 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. - */ - secs -= get_elapsed_seconds(AB8500_RTC_EPOCH); - mins = secs / 60; buf[2] = mins & 0xFF; @@ -445,6 +396,10 @@ static int ab8500_rtc_probe(struct platform_device *pdev) rtc->uie_unsupported = 1; + rtc->range_max = (1ULL << 24) * 60 - 1; // 24-bit minutes + 59 secs + rtc->start_secs = RTC_TIMESTAMP_BEGIN_2000; + rtc->set_start_time = true; + err = rtc_add_group(rtc, &ab8500_rtc_sysfs_files); if (err) return err; |