[PATCH v5 0/2] hwmon: (adm1275) Add sample averaging binding support

[Potin Lai]

This patch series allow user config PWR_AVG and VI_AVG in PMON_CONF
register by adding properties in device tree.

Example:
	adm1278@11 {
		compatible = "adi,adm1278";
		......
		adi,volt-curr-sample-average = <128>;
		adi,power-sample-average = <128>;
	};

LINK: [v1] https://lore.kernel.org/all/20220223163817.30583-1-potin.lai@xxxxxxxxxxxx/
LINK: [v2] https://lore.kernel.org/all/20220224154329.9755-1-potin.lai@xxxxxxxxxxxx/
LINK: [v3] https://lore.kernel.org/all/20220228103716.10774-1-potin.lai@xxxxxxxxxxxx/
LINK: [v4] https://lore.kernel.org/all/20220301103900.12637-1-potin.lai@xxxxxxxxxxxx/

Changes v4 --> v5:
- remove "adi,power-sample-average-enable" property, just set number of
  sampling to 1 as disabling sample averaging, and set 2 .. 128 as 
  enabling.
- update correct default value (from datasheet) in if-block of each chip,
  and set "adi,power-sample-average" to false if not allowed.
- change adm1278 pmon_config smbus write "byte" to "word" in probe,
  adm1278 pmon_config register has 2 bytes data length.

Changes v3 --> v4:
- add "adi,power-sample-average-enable" property
- add sample number cehcking in driver, only allow listed value
- remove info logging, add error log when invalid number detected

Changes v2 --> v3:
- change property type back to u32, use logical value instead of register
  value
- fix typo in properties description
- add if-block to descript "adi,power-sample-average" not alloed if
  compatible not in the enum list

Changes v1 --> v2:
- use more descriptive property name
- change property type from u32 to u8 
- add property value check, valid range between 1 and 7

Potin Lai (2):
  hwmon: (adm1275) Allow setting sample averaging
  dt-bindings: hwmon: Add sample averaging properties for ADM1275

 .../bindings/hwmon/adi,adm1275.yaml           | 69 +++++++++++++++++++
 drivers/hwmon/pmbus/adm1275.c                 | 40 ++++++++++-
 2 files changed, 108 insertions(+), 1 deletion(-)

-- 
2.17.1