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 <m...@kernel.org>
---
Changes from v2:
- use device_property_read_{bool,u32} instead of of equivalent
Changes from v1:
- of_property_read_u32() overwrites the output only if it succeeds,
simplify error handling
---
drivers/power/reset/gpio-poweroff.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/drivers/power/reset/gpio-poweroff.c
b/drivers/power/reset/gpio-poweroff.c
index be3d81ff51cc..6273ad3b411d 100644
--- a/drivers/power/reset/gpio-poweroff.c
+++ b/drivers/power/reset/gpio-poweroff.c
@@ -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);
--
2.16.1
