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>
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@ -21,6 +21,8 @@ LED sub-node properties:
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on). The "keep" setting will keep the LED at whatever its current
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state is, without producing a glitch. The default is off if this
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property is not present.
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- retain-state-suspended: (optional) The suspend state can be retained.Such
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as charge-led gpio.
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Examples:
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@ -50,3 +52,13 @@ run-control {
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default-state = "on";
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};
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};
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leds {
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compatible = "gpio-leds";
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charger-led {
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gpios = <&gpio1 2 0>;
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linux,default-trigger = "max8903-charger-charging";
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retain-state-suspended;
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};
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};
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@ -204,6 +204,9 @@ static struct gpio_leds_priv *gpio_leds_create_of(struct platform_device *pdev)
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led.default_state = LEDS_GPIO_DEFSTATE_OFF;
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}
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if (of_get_property(child, "retain-state-suspended", NULL))
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led.retain_state_suspended = 1;
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ret = create_gpio_led(&led, &priv->leds[priv->num_leds++],
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&pdev->dev, NULL);
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if (ret < 0) {
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