rtc: ds1347: properly handle oscillator failures

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The comment in the probe function stating that it disables oscillator stop
detection and glitch filtering is incorrect as it sets bits 3 and 4 while
it should be setting 5 and 6 to achieve that. Then, it is safe to assume
that the oscillator failure detection is actually enabled.

Properly handle oscillator failures by returning -EINVAL when the time and
date are know to be incorrect and reset the flag when the time is set.

Link: https://lore.kernel.org/r/20191007134724.15505-8-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

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Alexandre Belloni 2019-10-07 15:47:22 +02:00

parent 3ce20a23e2

commit d9dcfa5f70

1 changed files with 23 additions and 7 deletions

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drivers/rtc/rtc-ds1347.c

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