[PATCH] led: gpio: add support for default-state dt-property

[Sascha Hauer]

On Mon, Feb 16, 2015 at 02:03:28PM +0100, h.feurstein at gmail.com wrote:
> From: Hubert Feurstein <hubert.feurstein at deto.at>
> 
> This patch adds support for the default-state device tree property.
> 
> Signed-off-by: Hubert Feurstein <h.feurstein at gmail.com>
> ---
>  drivers/led/led-gpio.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/drivers/led/led-gpio.c b/drivers/led/led-gpio.c
> index a1a6617..69ad7e7 100644
> --- a/drivers/led/led-gpio.c
> +++ b/drivers/led/led-gpio.c
> @@ -204,6 +204,7 @@ static int led_gpio_of_probe(struct device_d *dev)
>  
>  	for_each_child_of_node(dev->device_node, child) {
>  		struct gpio_led *gled;
> +		const char *default_state;
>  		enum of_gpio_flags flags;
>  		int gpio;
>  		const char *label;
> @@ -225,6 +226,18 @@ static int led_gpio_of_probe(struct device_d *dev)
>  
>  		led_gpio_register(gled);
>  		led_of_parse_trigger(&gled->led, child);
> +
> +		if (!of_property_read_string(child, "default-state", &default_state)) {
> +			int state = -1;
> +
> +			if (!strcmp(default_state, "on"))
> +				state = 1;
> +			else if (!strcmp(default_state, "off"))
> +				state = 0;
> +
> +			if (state >= 0)
> +				led_gpio_set(&gled->led, state ^ gled->active_low);

led_gpio_set already evaluates active_low, so doing it here again is
wrong.

Sascha


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