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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>
hifive-unleashed-5.1
Robin Gong 2014-01-20 03:41:26 -08:00 committed by Bryan Wu
parent 25c6579f87
commit 4270a78d23
2 changed files with 15 additions and 0 deletions
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12
Documentation/devicetree/bindings/leds/leds-gpio.txt
View File

@ -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;
};
};

3
drivers/leds/leds-gpio.c
View File

@ -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) {