Re: [PATCH v6 2/3] hwmon: (cros_ec) add PWM control over fans

[Guenter Roeck <linux@roeck-us.net>]

On Thu, Sep 11, 2025 at 06:56:35AM +0000, Sung-Chi Li wrote:
> From: Sung-Chi Li <lschyi@chromium.org>
> 
> Newer EC firmware supports controlling fans through host commands, so
> adding corresponding implementations for controlling these fans in the
> driver for other kernel services and userspace to control them.
> 
> The driver will first probe the supported host command versions (get and
> set of fan PWM values, get and set of fan control mode) to see if the
> connected EC fulfills the requirements of controlling the fan, then
> exposes corresponding sysfs nodes for userspace to control the fan with
> corresponding read and write implementations.
> As EC will automatically change the fan mode to auto when the device is
> suspended, the power management hooks are added as well to keep the fan
> control mode and fan PWM value consistent during suspend and resume. As
> we need to access the hwmon device in the power management hook, update
> the driver by storing the hwmon device in the driver data as well.
> 
> Signed-off-by: Sung-Chi Li <lschyi@chromium.org>
> Acked-by: Thomas Weißschuh <linux@weissschuh.net>

Applied.

Guenter