linux-kernel - Re: [PATCH] leds: Further document parameters for blink

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Message-ID: <20090621063936.GA1656@ucw.cz>
Date:	Sun, 21 Jun 2009 08:39:36 +0200
From:	Pavel Machek <pavel@....cz>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Richard Purdie <rpurdie@...ys.net>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] leds: Further document parameters for blink_set()

On Thu 2009-06-11 14:17:48, Mark Brown wrote:
> The documentation for the parameters of blink_set() was a bit hard
> to find so put some where I'd expected to find it.
> 
> Signed-off-by: Mark Brown <broonie@...nsource.wolfsonmicro.com>
> ---
>  include/linux/leds.h |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
> 
> diff --git a/include/linux/leds.h b/include/linux/leds.h
> index 376fe07..c7f0b14 100644
> --- a/include/linux/leds.h
> +++ b/include/linux/leds.h
> @@ -45,7 +45,9 @@ struct led_classdev {
>  	/* Get LED brightness level */
>  	enum led_brightness (*brightness_get)(struct led_classdev *led_cdev);
>  
> -	/* Activate hardware accelerated blink */
> +	/* Activate hardware accelerated blink, delays are in
> +	 * miliseconds and if none is provided then a sensible default
> +	 * should be chosen. */
>  	int		(*blink_set)(struct led_classdev *led_cdev,
>  				     unsigned long *delay_on,
>  				     unsigned long *delay_off);

What a strange calling convention. Does it return data in
*delay_on/off ? Should that also be documented?
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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