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hwmon: (pwm-fan) set usage_power on PWM state

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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@brun.one>
Link: https://lore.kernel.org/r/20230309011009.2109696-1-lorenz@brun.one
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Lorenz Brun 2023-03-09 02:10:08 +01:00 committed by Guenter Roeck
parent dedbe4c149
commit a7da8a8bf1
1 changed files with 8 additions and 0 deletions
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8
drivers/hwmon/pwm-fan.c
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@ -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