Files
linux/drivers/rtc
Biwen Li 31e98cba55 rtc: pcf85363/pcf85263: fix regmap error in set_time
[ Upstream commit 7ef66122bd ]

Issue:
    - # hwclock -w
      hwclock: RTC_SET_TIME: Invalid argument

Why:
    - Relative commit: 8b9f9d4dc5 ("regmap: verify if register is
      writeable before writing operations"), this patch
      will always check for unwritable registers, it will compare reg
      with max_register in regmap_writeable.

    - The pcf85363/pcf85263 has the capability of address wrapping
      which means if you access an address outside the allowed range
      (0x00-0x2f) hardware actually wraps the access to a lower address.
      The rtc-pcf85363 driver will use this feature to configure the time
      and execute 2 actions in the same i2c write operation (stopping the
      clock and configure the time). However the driver has also
      configured the `regmap maxregister` protection mechanism that will
      block accessing addresses outside valid range (0x00-0x2f).

How:
    - Split of writing regs to two parts, first part writes control
      registers about stop_enable and resets, second part writes
      RTC time and date registers.

Signed-off-by: Biwen Li <biwen.li@nxp.com>
Link: https://lore.kernel.org/r/20190829021418.4607-1-biwen.li@nxp.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-10-07 18:57:12 +02:00
..
2018-07-26 15:08:53 +02:00
2018-08-16 07:46:41 +02:00
2018-05-21 22:34:38 +02:00
2018-03-27 10:45:05 +02:00
2018-05-17 22:23:14 +02:00
2018-03-17 14:20:56 +01:00
2018-05-03 22:08:00 +02:00
2018-05-03 22:08:00 +02:00
2018-05-03 22:08:00 +02:00
2017-09-01 01:10:11 +02:00
2017-09-01 01:10:11 +02:00
2016-05-20 12:33:51 +02:00
2018-03-17 14:20:50 +01:00
2018-05-03 22:08:00 +02:00
2018-05-18 09:38:22 +02:00
2018-03-17 14:20:56 +01:00
2018-05-03 22:08:00 +02:00
2018-05-22 09:47:17 +02:00
2018-05-03 22:08:00 +02:00
2017-08-22 12:05:21 +02:00
2018-06-07 20:11:08 +02:00
2016-05-20 12:33:51 +02:00
2017-09-05 09:55:02 +02:00
2018-05-17 22:43:22 +02:00
2013-04-19 13:51:25 +02:00
2018-05-23 09:26:19 +02:00
2018-05-03 22:08:00 +02:00
2018-07-12 20:16:10 +02:00
2018-05-17 22:37:11 +02:00
2018-05-17 22:54:21 +02:00
2016-05-20 12:33:51 +02:00
2018-05-03 22:08:00 +02:00