On Mon, Feb 16, 2015 at 02:03:28PM +0100, h.feurstein@xxxxxxxxx wrote:
> From: Hubert Feurstein <hubert.feurstein@xxxxxxx>
>
> This patch adds support for the default-state device tree property.
>
> Signed-off-by: Hubert Feurstein <h.feurstein@xxxxxxxxx>
> ---
> 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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