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rtc: pcf85063: Always clear EXT_TEST from set_time

Yuri Mazzuoli requested to merge seco_5.10.110_rtc_ym into seco_5.10.110

Power-on reset after the insertion of a battery does not always complete successfully, leading to corrupted register content. The EXT_TEST bit will stop the clock from running, but currently the driver will never recover.

Safely handle the erroneous state by clearing EXT_TEST as part of the usual set_time method.

Signed-off-by: Phil Elwell phil@raspberrypi.com Signed-off-by: Alexandre Belloni alexandre.belloni@bootlin.com Link: https://lore.kernel.org/r/20211015111208.1757110-1-phil@raspberrypi.com

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