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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: Moritz Fischer <mdf@kernel.org>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
This commit is contained in:
Moritz Fischer 2018-02-22 15:17:14 -08:00 committed by Sebastian Reichel
parent 88f598725f
commit d85b4f7b7f
1 changed files with 6 additions and 2 deletions
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8
drivers/power/reset/gpio-poweroff.c
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@ -19,11 +19,13 @@
#include <linux/of_platform.h>
#include <linux/module.h>
#define DEFAULT_TIMEOUT_MS 3000
/*
* Hold configuration here, cannot be more than one instance of the driver
* since pm_power_off itself is global.
*/
static struct gpio_desc *reset_gpio;
static u32 timeout = DEFAULT_TIMEOUT_MS;
static void gpio_poweroff_do_poweroff(void)
{
@ -40,7 +42,7 @@ static void gpio_poweroff_do_poweroff(void)
gpiod_set_value(reset_gpio, 1);
/* give it some time */
mdelay(3000);
mdelay(timeout);
WARN_ON(1);
}
@ -58,12 +60,14 @@ static int gpio_poweroff_probe(struct platform_device *pdev)
return -EBUSY;
}
input = of_property_read_bool(pdev->dev.of_node, "input");
input = device_property_read_bool(&pdev->dev, "input");
if (input)
flags = GPIOD_IN;
else
flags = GPIOD_OUT_LOW;
device_property_read_u32(&pdev->dev, "timeout-ms", &timeout);
reset_gpio = devm_gpiod_get(&pdev->dev, NULL, flags);
if (IS_ERR(reset_gpio))
return PTR_ERR(reset_gpio);