tree 1b65a52ee171ccd63782b1d7a25796b8dd39cc47
parent ae11cfc8df60667266269b240b5961bd22cf4fdc
author Cheng C Yang <cheng.c.yang@linux.intel.com> 1557226036 +0800
committer Cheng C Yang <cheng.c.yang@linux.intel.com> 1557363539 +0000

Add PSU PWM sensor to support FSC

Add PSU PWM sensor to allow FSC control PSU fan pwm.

Tested:
Change property Target to 100 in dbus interface xyz.openbmc_project.Control.FanPwm
path /xyz/openbmc_project/control/fanpwm/Pwm_PSU1_Fan_1, the value in
/sys/class/hwmon/hwmonx/fan1_target also become 100, and value property in interface
/xyz/openbmc_project/sensors/fan_pwm/Pwm_PSU1_Fan_1 become 39.2157

Run ipmitool sensor list, bellow sensors will show like:
Pwm PSU1 Fan 1   | 39.200     | unspecified | ok    | na        | na        | na        | na        | na        | na
Pwm PSU2 Fan 1   | 0.000      | unspecified | ok    | na        | na        | na        | na        | na        | na

Signed-off-by: Cheng C Yang <cheng.c.yang@linux.intel.com>
Change-Id: I6a4d50912a190297dbcf4a4e5c511607f71cb0c0