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Commit d85b4f7b authored by Moritz Fischer's avatar Moritz Fischer Committed by Sebastian Reichel
Browse files

power: reset: gpio-poweroff: Support for timeout from device property 



Add support for reading a timeout value from device property.
Fall back to previous default of 3s if nothing is specified.

Signed-off-by: default avatarMoritz Fischer <mdf@kernel.org>
Signed-off-by: default avatarSebastian Reichel <sre@kernel.org>
parent 88f59872

drivers/power/reset/gpio-poweroff.c

+6 −2
Original line number Original line Diff line number Diff line
@@ -19,11 +19,13 @@ 
#include <linux/of_platform.h>

#include <linux/of_platform.h>

#include <linux/module.h>

#include <linux/module.h>





#define DEFAULT_TIMEOUT_MS 3000

/*

/*

 * Hold configuration here, cannot be more than one instance of the driver

 * Hold configuration here, cannot be more than one instance of the driver

 * since pm_power_off itself is global.

 * since pm_power_off itself is global.

 */

 */

static struct gpio_desc *reset_gpio;

static struct gpio_desc *reset_gpio;

static u32 timeout = DEFAULT_TIMEOUT_MS;





static void gpio_poweroff_do_poweroff(void)

static void gpio_poweroff_do_poweroff(void)

{

{
@@ -40,7 +42,7 @@ static void gpio_poweroff_do_poweroff(void) 
	gpiod_set_value(reset_gpio, 1);

	gpiod_set_value(reset_gpio, 1);





	/* give it some time */

	/* give it some time */

	mdelay(3000);

	mdelay(timeout);





	WARN_ON(1);

	WARN_ON(1);

}

}
@@ -58,12 +60,14 @@ static int gpio_poweroff_probe(struct platform_device *pdev) 
		return -EBUSY;

		return -EBUSY;

	}

	}





	input = of_property_read_bool(pdev->dev.of_node, "input");

	input = device_property_read_bool(&pdev->dev, "input");

	if (input)

	if (input)

		flags = GPIOD_IN;

		flags = GPIOD_IN;

	else

	else

		flags = GPIOD_OUT_LOW;

		flags = GPIOD_OUT_LOW;





	device_property_read_u32(&pdev->dev, "timeout-ms", &timeout);



	reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);

	reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);

	if (IS_ERR(reset_gpio))

	if (IS_ERR(reset_gpio))

		return PTR_ERR(reset_gpio);

		return PTR_ERR(reset_gpio);