From: Pavel Machek <pavel@ucw.cz>
To: Richard Weinberger <richard.weinberger@gmail.com>
Cc: Joe Xue <lgxue@hotmail.com>,
"cooloney@gmail.com" <cooloney@gmail.com>,
"rpurdie@rpsys.net" <rpurdie@rpsys.net>,
"rob@landley.net" <rob@landley.net>,
"milo.kim@ti.com" <milo.kim@ti.com>,
"linux-leds@vger.kernel.org" <linux-leds@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>
Subject: Re: [PATCH] Add LED pattern trigger
Date: Tue, 31 Dec 2013 20:03:04 +0100 [thread overview]
Message-ID: <20131231190304.GA15451@amd.pavel.ucw.cz> (raw)
In-Reply-To: <CAFLxGvy31K9cgiuQKPmcbbr8QpMmj3vxmA1opNWT01qDUaLR0Q@mail.gmail.com>
On Tue 2013-12-31 13:29:21, Richard Weinberger wrote:
> On Tue, Dec 31, 2013 at 12:33 PM, Pavel Machek <pavel@ucw.cz> wrote:
> > 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 :-).
>
> Why do we need this within the kernel?
> Patterns can easily created using a simple user space program.
Some machines (N900) can do blinking in hardware, and we want
consistent kernel-user interface. See the mailing list.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next prev parent reply other threads:[~2013-12-31 19:03 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-30 0:11 [PATCH] Add LED pattern trigger Joe Xue
2013-12-30 16:21 ` One Thousand Gnomes
2013-12-30 23:24 ` Joe Xue
2013-12-31 0:18 ` One Thousand Gnomes
2013-12-31 18:48 ` Joe Xue
2014-01-01 20:10 ` One Thousand Gnomes
2014-01-01 22:44 ` David Lang
2014-01-01 23:01 ` One Thousand Gnomes
2014-01-01 23:51 ` David Lang
2014-01-03 0:14 ` Bryan Wu
2014-01-03 9:33 ` Richard Weinberger
2014-01-03 15:23 ` One Thousand Gnomes
2014-01-05 22:23 ` n900 led compiler (was Re: [PATCH] Add LED pattern trigger) Pavel Machek
2014-01-07 15:40 ` Linus Walleij
2013-12-30 18:33 ` [PATCH] Add LED pattern trigger Pavel Machek
2013-12-31 5:00 ` Joe Xue
2013-12-31 11:33 ` Pavel Machek
2013-12-31 12:29 ` Richard Weinberger
2013-12-31 19:03 ` Pavel Machek [this message]
2014-01-01 20:11 ` One Thousand Gnomes
2014-01-01 2:57 ` [PATCH v2 1/1] leds: " Joe Xue
2014-01-01 3:03 ` [PATCH v2 1/1] " Joe Xue
2014-01-06 21:47 ` [PATCH v3 1/1] leds: " lgxue
2014-01-06 22:10 ` Joe Xue
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