From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932843AbaLDRAL (ORCPT ); Thu, 4 Dec 2014 12:00:11 -0500 Received: from devils.ext.ti.com ([198.47.26.153]:45590 "EHLO devils.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932313AbaLDRAH (ORCPT ); Thu, 4 Dec 2014 12:00:07 -0500 From: Nishanth Menon To: Guenter Roeck , Jean Delvare CC: , , , Nishanth Menon Subject: [PATCH] hwmon: (gpio-fan) Add a shutdown handler to poweroff the fans Date: Thu, 4 Dec 2014 10:58:56 -0600 Message-ID: <1417712336-31070-1-git-send-email-nm@ti.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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