From b95579cd8795442e75c8846fa6eeb4fb442e9d83 Mon Sep 17 00:00:00 2001 From: Nishanth Menon Date: Thu, 4 Dec 2014 10:58:56 -0600 Subject: hwmon: (gpio-fan) Add a shutdown handler to poweroff the fans 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 Signed-off-by: Guenter Roeck --- drivers/hwmon/gpio-fan.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/hwmon/gpio-fan.c') diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c index 7802eb2a442f..36abf814b8c7 100644 --- a/drivers/hwmon/gpio-fan.c +++ b/drivers/hwmon/gpio-fan.c @@ -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, -- cgit