rtc: pcf2127: adapt time/date registers write sequence for PCF2131

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The sequence for updating the time/date registers is slightly
different between PCF2127/29 and PCF2131.

For PCF2127/29, during write operations, the time counting
circuits (memory locations 03h through 09h) are automatically blocked.

For PCF2131, time/date registers write access requires setting the
STOP bit and sending the clear prescaler instruction (CPR). STOP then
needs to be released once write operation is completed.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Link: https://lore.kernel.org/r/20230622145800.2442116-14-hugo@hugovil.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

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Hugo Villeneuve 2023-06-22 10:57:56 -04:00 • committed by Alexandre Belloni

parent e1849b8fcd

commit 3d715ebaf0

1 changed files with 34 additions and 1 deletions

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drivers/rtc/rtc-pcf2127.c

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