X-Git-Url: https://repo.jachan.dev/J-linux.git/blobdiff_plain/b83a7080d30032cf70832bc2bb04cc342e203b88..901bdf5ea1a836400ee69aa32b04e9c209271ec7:/drivers/hwmon/pwm-fan.c

diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c
index 83a347ca35da..6e4516c2ab89 100644
--- a/drivers/hwmon/pwm-fan.c
+++ b/drivers/hwmon/pwm-fan.c
@@ -427,7 +427,7 @@ static int pwm_fan_of_get_cooling_data(struct device *dev,
 	struct device_node *np = dev->of_node;
 	int num, i, ret;
 
-	if (!of_find_property(np, "cooling-levels", NULL))
+	if (!of_property_present(np, "cooling-levels"))
 		return 0;
 
 	ret = of_property_count_u32_elems(np, "cooling-levels");
@@ -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