tree 8f7261a0f291c48cc8d747a871a8a2a3e009ddb6
parent 54ffb271b995db4f0b00f0661baab23763fae5bd
author Zbigniew Kurzynski <zbigniew.kurzynski@intel.com> 1590772884 +0200
committer Zbigniew Kurzynski <zbigniew.kurzynski@intel.com> 1591340967 +0000

Exposing power capping values as a sensor

This implementation introduces support for power capping values provided
by hwmon. Values are read from files with suffix cap, cap_max and cap_min
and are exposed as properties of the interface xyz.openbmc_project.Sensor.Value
The property Value is taken from the  power[N]_cap file in a standard way.
While the MaxValue and MinValue are periodically read from the corresponding
files: power[N]_cap_max and power[N]_cap_min. If cap_max, cap_min files cannot
be read properties MinValue/MaxValue are set to 0 unless the power is OFF then
NaN is returned. For other types of files than ‘cap’ default CPUSensor MinValue,
MaxValue values are used as it was before this change.

Link to sysfs file descriptions:
https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface

Tested: Test were done manually, no regression detected.

Signed-off-by: Zbigniew Kurzynski <zbigniew.kurzynski@intel.com>
Change-Id: I72fd85f3f441b8a430b9dadd47c874eec52b7829