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| author | Yauhen Kharuzhy <jekhor@gmail.com> | 2012-01-10 15:10:32 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-01-10 16:30:52 -0800 |
| commit | 7287be1d0ac8c82999b67c2a33517c6ec9cfdbe7 (patch) | |
| tree | 7ed79d428bec700c2288c83cf3d685f87aa7019a /drivers/rtc/rtc-mxc.c | |
| parent | b43c1ea4d622b6951377de92edfb219d893e23ef (diff) | |
| download | talos-obmc-linux-7287be1d0ac8c82999b67c2a33517c6ec9cfdbe7.tar.gz talos-obmc-linux-7287be1d0ac8c82999b67c2a33517c6ec9cfdbe7.zip | |
drivers/rtc/rtc-mxc.c: fix setting time for MX1 SoC
There is no way to track year in the i.MX1 RTC: Days Counter register is
9-bit wide only. Attempt to save date after 1970-01-01 plus 512 days
causes endless loop in mxc_rtc_set_mmss(). Fix this by resetting year to
1970.
[akpm@linux-foundation.org: use conventional comment layout]
Signed-off-by: Yauhen Kharuzhy <jekhor@gmail.com>
Cc: Daniel Mack <daniel@caiaq.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/rtc-mxc.c')
| -rw-r--r-- | drivers/rtc/rtc-mxc.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c index 39e41fbdf08b..11b7b614fc8d 100644 --- a/drivers/rtc/rtc-mxc.c +++ b/drivers/rtc/rtc-mxc.c @@ -290,6 +290,17 @@ static int mxc_rtc_read_time(struct device *dev, struct rtc_time *tm) */ static int mxc_rtc_set_mmss(struct device *dev, unsigned long time) { + /* + * TTC_DAYR register is 9-bit in MX1 SoC, save time and day of year only + */ + if (cpu_is_mx1()) { + struct rtc_time tm; + + rtc_time_to_tm(time, &tm); + tm.tm_year = 70; + rtc_tm_to_time(&tm, &time); + } + /* Avoid roll-over from reading the different registers */ do { set_alarm_or_time(dev, MXC_RTC_TIME, time); |
