linux-kernel - Re: [PATCH/RFC v3 1/7] leds: Add led_set_brightness

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Date:	Sun, 5 Jul 2015 14:34:48 +0200
From:	Pavel Machek <pavel@...x.de>
To:	Jacek Anaszewski <j.anaszewski@...sung.com>
Cc:	linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
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Subject: Re: [PATCH/RFC v3 1/7] leds: Add led_set_brightness_sync to the
 public LED subsystem API

Hi!

>  extern void led_set_brightness(struct led_classdev *led_cdev,
>  			       enum led_brightness brightness);
> +
> +/**
> + * led_set_brightness_sync - set LED brightness synchronously
> + * @led_cdev: the LED to set
> + * @brightness: the brightness to set it to
> + *
> + * Set an LED's brightness immediately. This function will block
> + * the caller for the time required for accessing device register,
> + * and it can sleep.
> + */
> +static inline int led_set_brightness_sync(struct led_classdev *led_cdev,
> +					  enum led_brightness value)
> +{
> +	int ret = 0;
> +
> +	led_cdev->brightness = min(value, led_cdev->max_brightness);
> +
> +	if (led_cdev->flags & LED_SUSPENDED)
> +		return 0;
> +
> +	if (led_cdev->brightness_set_sync)
> +		ret = led_cdev->brightness_set_sync(led_cdev,
> +						    led_cdev->brightness);
> +	else
> +		led_cdev->brightness_set(led_cdev, led_cdev->brightness);
> +
> +	return 0;
> +}

return ret, AFAICT?
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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