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

From: Stephen Boyd
Date: Thu Feb 12 2015 - 23:35:04 EST

On 02/12/15 20:28, Ivan T. Ivanov wrote:
> On Thu, 2015-02-12 at 20:07 -0800, Stephen Boyd 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.
> Yes, I can not see visual changes. That is why I have asked where
> I could hook the probe and measure current change or wherever.
> BL_WLEDx signals go out from J2, but somehow I was unable to
> locate it on the board, will try to look harder :-)

When the screen is "off" in android I can still turn on the brightness
to max in sysfs and see the screen glow. Hopefully we don't need
something else to make that work.

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