linux-kernel - Re: [PATCH v3 1/5] leds: lm3532: Fix brightness control for i2c mode

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Message-ID: <20190826221413.GA19124@amd>
Date:   Tue, 27 Aug 2019 00:14:14 +0200
From:   Pavel Machek <pavel@....cz>
To:     Tony Lindgren <tony@...mide.com>
Cc:     Dan Murphy <dmurphy@...com>, jacek.anaszewski@...il.com,
        sre@...nel.org, nekit1000@...il.com, mpartap@....net,
        merlijn@...zup.org, linux-leds@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/5] leds: lm3532: Fix brightness control for i2c mode

On Mon 2019-08-26 14:58:22, Tony Lindgren wrote:
> Hi,
> 
> * Dan Murphy <dmurphy@...com> [190820 19:53]:
> > Fix the brightness control for I2C mode.  Instead of
> > changing the full scale current register update the ALS target
> > register for the appropriate banks.
> > 
> > In addition clean up some code errors and random misspellings found
> > during coding.
> > 
> > Tested on Droid4 as well as LM3532 EVM connected to a BeagleBoneBlack
> > 
> > Fixes: e37a7f8d77e1 ("leds: lm3532: Introduce the lm3532 LED driver")
> > Reported-by: Pavel Machek <pavel@....cz>
> > Signed-off-by: Dan Murphy <dmurphy@...com>
> > ---
> > 
> > v3 - Removed register define updates - https://lore.kernel.org/patchwork/patch/1114542/
> 
> Looks like starting with this patch in Linux next the LCD on droid4
> is so dim it's unreadable even with brightness set to 255. Setting
> brightness to 0 does blank it completely though.
> 
> Did something maybe break with the various patch revisions or are
> we now missing some dts patch?

Maybe missing dts patch. We should provide maximum current the LED can
handle... 

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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