linux-kernel - Re: [PATCH 4.19 014/639] leds: tlc591xx: update the maximum brightness

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Message-ID: <20200127124055.GB19331@duo.ucw.cz>
Date:   Mon, 27 Jan 2020 13:40:55 +0100
From:   Pavel Machek <pavel@...x.de>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Pavel Machek <pavel@...x.de>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org, Jean-Jacques Hiblot <jjhiblot@...com>
Subject: Re: [PATCH 4.19 014/639] leds: tlc591xx: update the maximum
 brightness

On Sun 2020-01-26 10:18:11, Greg Kroah-Hartman wrote:
> On Sat, Jan 25, 2020 at 12:18:26AM +0100, Pavel Machek wrote:
> > On Fri 2020-01-24 10:23:04, Greg Kroah-Hartman wrote:
> > > From: Jean-Jacques Hiblot <jjhiblot@...com>
> > > 
> > > commit a2cafdfd8cf5ad8adda6c0ce44a59f46431edf02 upstream.
> > > 
> > > The TLC chips actually offer 257 levels:
> > > - 0: led OFF
> > > - 1-255: Led dimmed is using a PWM. The duty cycle range from 0.4% to 99.6%
> > > - 256: led fully ON
> > > 
> > > Fixes: e370d010a5fe ("leds: tlc591xx: Driver for the TI 8/16 Channel i2c LED driver")
> > > Signed-off-by: Jean-Jacques Hiblot <jjhiblot@...com>
> > > Signed-off-by: Pavel Machek <pavel@....cz>
> > > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > 
> > Its a new feature, really and quite unusual one: 257 brightness levels
> > is not usual. It is theoretically safe, but...
> > 
> > Lets not do that for -stable.
> > 
> > (I'm a LED maintainer).
> 
> Ok, now dropped from 4.19 and older, thanks!

Thank you!
								Pavel
-- 
DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany

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