linux-kernel - Re: How to set fops in "struct platform_pwm_backlight

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Message-ID: <20131022124905.GA24255@ulmo.nvidia.com>
Date:	Tue, 22 Oct 2013 14:49:06 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Mark Zhang <nvmarkzhang@...il.com>
Cc:	rpurdie@...ys.net, jg1.han@...sung.com,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	tomi.valkeinen@...com, linux-pwm@...r.kernel.org,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: How to set fops in "struct platform_pwm_backlight_data"?

On Tue, Oct 22, 2013 at 04:55:09PM +0800, Mark Zhang wrote:
> On 10/22/2013 03:24 PM, Thierry Reding wrote:
> > On Fri, Oct 18, 2013 at 12:48:12PM +0800, Mark Zhang wrote:
> [...]
> >>>
> >>
> >> Okay, I just want to set the "notify" function pointer in "struct
> >> platform_pwm_backlight_data", because I want to tune the brightness
> >> value before the pwm-bl sets the brightness to hardware. I don't know
> >> how to do that, unless we define the platform data explicitly.
> > 
> > Okay, my question should have been what you need the functions for and
> > why you think you need them.
> > 
> 
> If I understanding you correctly, I suppose I've said that: "because I
> want to tune the brightness value before the pwm-bl sets the brightness
> to hardware".

Why do you want to tune the brightness value? What are you trying to
achieve?

Thierry

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