[PATCH 2/7] basic LED support

[Jean-Christophe PLAGNIOL-VILLARD]

> +/**
> + * led_set - set the value of a LED
> + * @param led	the led
> + * @param value	the value of the LED (0 is disabled)
> + */
> +int led_set(struct led *led, unsigned int value)
> +{
> +	if (value > led->max_value)
> +		value = led->max_value;
> +
> +	led->set(led, value);
> +
> +	return 0;
why always return 0?
> +}
> +
> +/**
> + * led_set_num - set the value of a LED
> + * @param num	the number of the LED
> + * @param value	the value of the LED (0 is disabled)
> + */
> +int led_set_num(int num, unsigned int value)
> +{
> +	struct led *led = led_by_number(num);
> +
> +	if (!led)
> +		return -ENODEV;
> +
> +	return led_set(led, value);
> +}
> +
> +/**
> + * led_register - Register a LED
> + * @param led	the led
> + */
> +int led_register(struct led *led)
> +{
no safe check?
> +	led->num = num_leds++;
> +
> +	list_add_tail(&led->list, &leds);
> +
> +	return 0;
> +}
> +
> +/**
> + * led_unregister - Unegister a LED
> + * @param led	the led
> + */
> +void led_unregister(struct led *led)
> +{
> +	list_del(&led->list);
> +}
> diff --git a/include/led.h b/include/led.h
> new file mode 100644
> index 0000000..62d0d08
> --- /dev/null
> +++ b/include/led.h
> @@ -0,0 +1,25 @@
> +#ifndef __LED_H
> +#define __LED_H
> +
> +struct led {
> +	unsigned long triger;
> +	void (*set)(struct led *, unsigned int value);
return a int will good to known the result
> +	int max_value;
> +	int num;
> +	struct list_head list;
> +};
> +
> +struct led *led_by_number(int no);
> +
> +static inline int led_get_number(struct led *led)
> +{
> +	return led->num;
> +}
> +
> +int led_set_num(int num, unsigned int value);
> +int led_set(struct led *led, unsigned int value);
> +int led_register(struct led *led);
> +void led_unregister(struct led *led);
> +void led_unregister(struct led *led);
twice

Best Regards,
J.