From a7da8a8bf19b758d6db50a1c09627b0422fe98db Mon Sep 17 00:00:00 2001 From: Lorenz Brun Date: Thu, 9 Mar 2023 02:10:08 +0100 Subject: [PATCH] hwmon: (pwm-fan) set usage_power on 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. Signed-off-by: Lorenz Brun Link: https://lore.kernel.org/r/20230309011009.2109696-1-lorenz@brun.one Signed-off-by: Guenter Roeck --- 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 57928d270015..6e4516c2ab89 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