linux-kernel - Re: Driver lis3lv02d_i2c not working on Nokia RX-51

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Message-Id: <201303242345.00176@pali>
Date:	Sun, 24 Mar 2013 23:44:59 +0100
From:	Pali Rohár <pali.rohar@...il.com>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc:	Eric Piel <eric.piel@...mplin-utc.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: Driver lis3lv02d_i2c not working on Nokia RX-51

On Sunday 24 March 2013 23:14:46 Mark Brown wrote:
> On Sun, Mar 24, 2013 at 10:27:32PM +0100, Pali Rohár wrote:
> > On Sunday 24 March 2013 22:21:49 Mark Brown wrote:
> > > You need to look at the schematics rather than the code
> > > here - the code just needs to say what regulator supplies
> > > Vdd on the device.
> > 
> > This is problem, there is no info about regulator supplies
> > for this device...
> 
> Well, you should seek support from the board vendor then. 

Not possible. Nokia is already using Windows Phones and life 
cycle for Nokia N900 phone is at the end. And Nokia never 
released any HW documentations to community...

> Or try things like continuity tests (the regulator will have
> external components, most likely there's at least a
> decoupling cap you can probe at the device end too).

Disassembling this mobile phone is not simple and I dubt that it 
will help me...

Another question: what was reason for that commit 
ec400c9fab99d16a491cea17d27d0c6a5780b97c
"lis3lv02d: make regulator API usage unconditional" ?

I think that for N900 support is reverting above commit needed, I 
do not see other solution...

-- 
Pali Rohár
pali.rohar@...il.com

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