linux-kernel - Re: [PATCH v2 2/2] leds: add Qualcomm PM8941 WLED driver

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Message-ID: <CAJAp7OgGVifWrdnGc4XK86jkGr-5OO1CRr4o5+pN760h5OTvcg@mail.gmail.com>
Date:	Tue, 17 Feb 2015 15:05:55 -0800
From:	Bjorn Andersson <bjorn@...o.se>
To:	Stephen Boyd <sboyd@...eaurora.org>
Cc:	"Ivan T. Ivanov" <iivanov@...sol.com>,
	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Bryan Wu <cooloney@...il.com>,
	Richard Purdie <rpurdie@...ys.net>,
	Grant Likely <grant.likely@...aro.org>,
	Courtney Cavin <courtney.cavin@...ymobile.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Linux LED Subsystem <linux-leds@...r.kernel.org>,
	linux-arm-msm <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v2 2/2] leds: add Qualcomm PM8941 WLED driver

On Thu, Feb 12, 2015 at 8:07 PM, Stephen Boyd <sboyd@...eaurora.org> wrote:
> On 01/29/15 04:48, Ivan T. Ivanov wrote:
>>
>> Otherwise it looks good. Driver is loaded and device is detected
>> properly (i have added readings for type and subtype registers).
>> Do you know where I can measure result from changing brightness
>> sysfs entry. I am using 8074 dragonboard?
>
> Does the backlight turn on? From what I can tell it controls the
> backlight, but it may be that nothings getting displayed so it won't be
> noticeable.
>

I have not measured the voltage/current, nor have had something on the
display. But on the various devices I've tested (Xperia Z1 & Xperia Z
Ultra) the backlight is clearly on.

Regards,
Bjorn
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