drivers/rtc/rtc-r9701.c: reset registers if invalid values are detected
hwclock refuses to set date/time if RTC registers contain invalid values. Check the date/time register values at probe time and initialize them to make hwclock happy. Signed-off-by: NAndreas Dumberger <andreas.dumberger@tqs.de> Signed-off-by: NAnatolij Gustschin <agust@denx.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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