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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 <nm@ti.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Nishanth Menon 2014-12-04 10:58:56 -06:00 committed by Guenter Roeck
parent 52a95c1185
commit b95579cd87
1 changed files with 9 additions and 0 deletions
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9
drivers/hwmon/gpio-fan.c
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@ -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,