PWM fans are controlled solely by the duty cycle of the PWM signal, they do not care about the exact timing. Thus set usage_power to true to allow less flexible hardware to work as a PWM source for fan control. Signed-off-by: Lorenz Brun <lorenz@xxxxxxxx> --- drivers/hwmon/pwm-fan.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c index 83a347ca35da..aa746c2bde39 100644 --- a/drivers/hwmon/pwm-fan.c +++ b/drivers/hwmon/pwm-fan.c @@ -507,6 +507,14 @@ static int pwm_fan_probe(struct platform_device *pdev) pwm_init_state(ctx->pwm, &ctx->pwm_state); + /* + * PWM fans are controlled solely by the duty cycle of the PWM signal, + * they do not care about the exact timing. Thus set usage_power to true + * to allow less flexible hardware to work as a PWM source for fan + * control. + */ + ctx->pwm_state.usage_power = true; + /* * set_pwm assumes that MAX_PWM * (period - 1) fits into an unsigned * long. Check this here to prevent the fan running at a too low -- 2.39.2
