leds: leds-gpio: add retain-state-suspended property

Some gpio-leds need retain the state even in suspend, such as charger led.
But this property missed in devicetree, add it.

(cooloney@gmail.com: fold DT binding updates into this patch)

Signed-off-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c
index 78b0e273a903..1bb3f1ab1d91 100644
--- a/drivers/leds/leds-gpio.c
+++ b/drivers/leds/leds-gpio.c
@@ -204,6 +204,9 @@ static struct gpio_leds_priv *gpio_leds_create_of(struct platform_device *pdev)
                                 led.default_state = LEDS_GPIO_DEFSTATE_OFF;
                 }
 
+                if (of_get_property(child, "retain-state-suspended", NULL))
+                        led.retain_state_suspended = 1;
+
                 ret = create_gpio_led(&led, &priv->leds[priv->num_leds++],
                                       &pdev->dev, NULL);
                 if (ret < 0) {