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>

diff --git a/drivers/power/reset/gpio-poweroff.c b/drivers/power/reset/gpio-poweroff.c
index be3d81f..6273ad3 100644 (file)
--- 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);