linux-kernel - RE: [PATCH] pwm_backlight: Add device tree support for Low Threshold Brightness

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Date:	Fri, 21 Sep 2012 04:51:19 +0000
From:	"Philip, Avinash" <avinashphilip@...com>
To:	Thierry Reding <thierry.reding@...onic-design.de>
CC:	"grant.likely@...retlab.ca" <grant.likely@...retlab.ca>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"rob@...dley.net" <rob@...dley.net>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>,
	"broonie@...nsource.wolfsonmicro.com" 
	<broonie@...nsource.wolfsonmicro.com>,
	"shawn.guo@...aro.org" <shawn.guo@...aro.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Nori, Sekhar" <nsekhar@...com>,
	"Hebbar, Gururaja" <gururaja.hebbar@...com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: RE: [PATCH] pwm_backlight: Add device tree support for Low
 Threshold Brightness

On Wed, Sep 19, 2012 at 12:14:25, Thierry Reding wrote:
> On Wed, Aug 01, 2012 at 06:51:21AM +0000, Philip, Avinash wrote:
> > On Mon, Jul 30, 2012 at 12:28:05, Thierry Reding wrote:
> > > On Wed, Jul 25, 2012 at 05:54:02PM +0530, Philip, Avinash wrote:
> > > > Low Threshold Brightness should be configured to have a linear relation
> > > > in brightness scale. This patch adds device tree support for low
> > > > threshold brightness as optional one for pwm_backlight.
> > > 
> > > I think this should be more explicit as to why this is required, perhaps
> > > something like this:
> > > 
> > > 	Some backlights perform poorly when driven by a PWM with a short
> > > 	duty-cycle. For such devices, the low threshold can be used to
> > > 	specify a lower bound for the duty-cycle and should be chosen to
> > > 	exclude the problematic range.
> > > 
> > > 	This patch adds support for an optional low-threshold-brightness
> > > 	property.
[snip]
> 
> I think you never sent an updated patch or maybe I missed it. But I
> noticed that this patch has now ended up in Andrew's tree without the
> comments being addressed. Can you please follow up?

I will send a revised patch.

Thanks
Avinash

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