tree 843fadd3491db98de343d9a4f74d2474d1b0c868
parent 30cab6296637819aa95d5c64f67eb355b777dde3
author Matt Spinler <spinler@us.ibm.com> 1732123054 -0600
committer Matt Spinler <spinler@us.ibm.com> 1732123054 -0600

fan_speed: Always write target prop to sysfs

Leave it up to the fan control application on when to write the fan
target value to the hardware and just always do it instead of throwing
away the write if the previous property value was the same.

This protects against the case when the fan control device resets
itself, such as due to an internal watchdog failure, and sets its
registers to a default that doesn't match sysfs or D-Bus.  Now if fan
control writes the target property again, even if it is the same, it
will restore the actual value to what is desired.

Tested:

1. Write directly to sysfs fan*_target to change the value from what is
   on D-Bus.
2. Use busctl set-property to set the Target property to the same value
   it already is.
3. Ensure the fan*_target file changes back to the value.

Change-Id: Ib71567e08118f1367610ec311a4b990a4e5019c9
Signed-off-by: Matt Spinler <spinler@us.ibm.com>