linux-kernel - Re: [RFC] add pwmlib support

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Date:	Sun, 30 Jan 2011 11:49:32 +0800
From:	arden jay <arden.jay@...il.com>
To:	Wolfram Sang <w.sang@...gutronix.de>
Cc:	Jean Delvare <khali@...ux-fr.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	linux-kernel@...r.kernel.org, Eric Miao <eric.miao@...aro.org>,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Lars-Peter Clausen <lars@...afoo.de>,
	Hemanth V <hemanthv@...com>,
	linux-arm-kernel@...ts.infradead.org,
	Uwe Kleine-Koenig <u.kleine-koenig@...gutronix.de>,
	Shawn Guo <shawn.guo@...escale.com>
Subject: Re: [RFC] add pwmlib support

Sorry, I'm confused about this.
If it is for backlight control, why it don't go through led_class?

Do I miss anything?

2011/1/30 Wolfram Sang <w.sang@...gutronix.de>:
>
>> > code is inspired by gpiolib support and tested using the backlight pwm
>                                                             ^^^^^^^^^
>> So I believe that hwmon drivers are out of scope for pwmlib. Which
>> makes me wonder what you intend to do with pwmlib (back to my first
>> question...) as the only use I know of for PWM signals in computers is
>> for fan control.
>
> It was meant for backlight control (was mentioned very indirectly).
> I also pointed him to Bill's implementation, too.
>
> Regards,
>
>   Wolfram
>
> --
> Pengutronix e.K.                           | Wolfram Sang                |
> Industrial Linux Solutions                 | http://www.pengutronix.de/  |
>
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> =ROYN
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>



-- 
cheers,
jay
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