lkml.org 
[lkml]   [2014]   [Dec]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] hwmon: (gpio-fan) Add a shutdown handler to poweroff the fans
Date
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>
---
based on next-20141204 , but can rebase to required branch as needed.

drivers/hwmon/gpio-fan.c | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
index 7802eb2..36abf81 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,
--
1.7.9.5


\
 
 \ /
  Last update: 2014-12-04 18:41    [W:0.030 / U:0.056 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site