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Commit 4270a78d authored by Robin Gong's avatar Robin Gong Committed by Bryan Wu
Browse files

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: default avatarRobin Gong <b38343@freescale.com>
Signed-off-by: default avatarBryan Wu <cooloney@gmail.com>
parent 25c6579f

Documentation/devicetree/bindings/leds/leds-gpio.txt

+12 −0
Original line number Diff line number Diff line
@@ -21,6 +21,8 @@ LED sub-node properties: 
  on).  The "keep" setting will keep the LED at whatever its current

  state is, without producing a glitch.  The default is off if this

  property is not present.

- retain-state-suspended: (optional) The suspend state can be retained.Such

  as charge-led gpio.



Examples:
@@ -50,3 +52,13 @@ run-control { 
		default-state = "on";

	};

};



leds {

	compatible = "gpio-leds";



	charger-led {

		gpios = <&gpio1 2 0>;

		linux,default-trigger = "max8903-charger-charging";

		retain-state-suspended;

	};

};

drivers/leds/leds-gpio.c

+3 −0
Original line number Diff line number Diff line
@@ -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) {