tree 72498c0356328fcaa02595e0b364f1e6c92488ca
parent e1dcb5c1f2d33048a55b20fc1a9830ea02c9d814
author Chau Ly <chaul@amperecomputing.com> 1720501266 +0000
committer Chau Ly <chaul@amperecomputing.com> 1726730561 +0000

PSUSensor: Add smpro-hwmon sensor type

This commit adds smpro-hwmon driver as a new sensor type to the type
list of PSUSensor, as they have the same sysfs appearances and the same
way to read sensors.

But as there are 3 different drivers applied for the smpro MFD devices
of Ampere (smpro-hwmon is one). The hwmon path result from smpro-hwmon
will be different from other pmbus drivers that have device path points
directly to the i2c device path. The current implementation of PSUSensor
to get i2c bus, address only works for the later case, so this commit
uses regex to look for it instead and makes it work for wider cases.

Example:

`root@mtjade:/sys/class/hwmon# ls -la hwmon8 hwmon9
hwmon8 -> ../../devices/platform/xxx/1e78a0c0.i2c-bus/i2c-2/2-004e/\
smpro-hwmon.3.auto/hwmon/hwmon8

hwmon9 -> ../../devices/platform/xxx/1e78a1c0.i2c-bus/i2c-6/6-0058/\
hwmon/hwmon9

root@mtjade:/sys/class/hwmon# ls -la hwmon8/device hwmon9/device
hwmon8/device -> ../../2-004e/smpro-hwmon.3.auto
hwmon9/device -> ../../../6-0058

Tested on Ampere's Mt.Jade platform:
PSUSensor successfully maps Entity-Manager configurations with sysfs of
smpro-hwmon sensors, and reads values.

Signed-off-by: Chau Ly <chaul@amperecomputing.com>
Change-Id: I0ea0828e8726719969071a18bb27115c7cc71a9f