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2 commits

Author SHA1 Message Date
Chris Packham
d6c0d7087f drivers: rtc: max313xx: provide read8/write8 
In some designs the MAX313xx RTC may need calibration to cope with
oscillator inaccuracies. Provide read8/write8 ops so that the registers
can be accessed. Because the driver covers a range of MAX313xx variants
no attempt is made to ensure the register is valid.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
 2023-07-25 12:44:46 -04:00
Chris Packham
0798a1ce0f drivers: rtc: add max313xx series rtc driver 
Adding support for Analog Devices MAX313XX series RTCs.

This is ported from the Linux driver and adapted for use in u-boot.
Notable differences are
- handling of tm_year and tm_mon differ
- clock source support is omitted
- hwmon support for the MAX31328 and MAX31343 is omitted
- rtc_ops->reset is added

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
 2023-03-30 15:09:59 -04:00