linux-kernel - Re: [PATCH] Add LED pattern trigger

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Message-ID: <20131231113352.GA4233@amd.pavel.ucw.cz>
Date:	Tue, 31 Dec 2013 12:33:52 +0100
From:	Pavel Machek <pavel@....cz>
To:	Joe Xue <lgxue@...mail.com>
Cc:	"cooloney@...il.com" <cooloney@...il.com>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>,
	"rob@...dley.net" <rob@...dley.net>,
	"milo.kim@...com" <milo.kim@...com>,
	"linux-leds@...r.kernel.org" <linux-leds@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH] Add LED pattern trigger

On Tue 2013-12-31 00:00:39, Joe Xue wrote:
> > What about something like this?
> >
> > Not shcheduling timer when nothing changed should save a bit of power/cpu...
> >
> > if (pattern_data->pattern[pattern_data->count] == '/') {
> > return;
> > }
> >
> > this = pattern_data->pattern[pattern_data->count]
> > if (this == '#')
> > new_brigtness = pattern_data->brightness_on;
> > if (this == ' ')
> > new_brigtness = LED_OFF;
> > repeat = 1;
> > while (pattern_data->pattern[pattern_data->count + repeat] == this)
> > repeat++;
> >
> > mod_timer(&pattern_data->timer,
> > jiffies + msecs_to_jiffies(pattern_data->delay_unit * repeat));
> >
> >
> Working on it.
> 
> Thanks for your help.

You are welcome :-).
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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