hwmon: (arctic_fan_controller) Default PWM cache to MCU 40%

The device has no GET_REPORT and every OUT report carries all 10
channels, so the cache has to start at some value. Starting at 0
means the first sysfs write to a single channel also sends 0% on
the other nine.

The MCU factory default is 40%. Initialize pwm_duty[] to 102 (40%
on the 0-255 sysfs scale) at probe and on reset-resume. Any initial
cache can be stale if the module is reloaded without a device
reset. 40% matches the hardware after power-on or power-loss
resume, and a first single-channel write leaves the fans running
at a safe speed.

PWM is still not taken from periodic IN reports: the device is
manual-only and the host cache stays authoritative after the first
successful write.

Signed-off-by: Aureo Serrano de Souza <aureo.serrano@arctic.de>
Link: https://patch.msgid.link/20260910050401.279868-2-aureo.serrano@arctic.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

0 files changed, 0 insertions, 0 deletions