hwmon: (gpio-fan) Add a shutdown handler to poweroff the fans (b95579cd) · Commits · 戴 / test

Poweroff the fans when shutting down the system. Else, echo '1' > /sys/class/hwmon/hwmon0/fan1_target; poweroff leaves the fan running if the System power off does not drive the gpio expander which might control the fan power supply. Signed-off-by:

Nishanth Menon <nm@ti.com> Signed-off-by:

Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/gpio-fan.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -550,6 +550,14 @@ static int gpio_fan_probe(struct platform_device *pdev)
		return 0;
		}

		static void gpio_fan_shutdown(struct platform_device *pdev)
		{
		struct gpio_fan_data *fan_data = dev_get_drvdata(&pdev->dev);

		if (fan_data->ctrl)
		set_fan_speed(fan_data, 0);
		}

		#ifdef CONFIG_PM_SLEEP
		static int gpio_fan_suspend(struct device *dev)
		{
		@@ -581,6 +589,7 @@ static SIMPLE_DEV_PM_OPS(gpio_fan_pm, gpio_fan_suspend, gpio_fan_resume);

		static struct platform_driver gpio_fan_driver = {
		.probe = gpio_fan_probe,
		.shutdown = gpio_fan_shutdown,
		.driver = {
		.name = "gpio-fan",
		.pm = GPIO_FAN_PM,

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