linux-kernel - Re: [PATCH V5 2/2] mfd: stmpe: Update DT support in stmpe driver

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Message-ID: <20121206111252.GR2718@gmail.com>
Date:	Thu, 6 Dec 2012 11:12:52 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	rabin.vincent@...ricsson.com, shiraz.hashim@...com,
	devicetree-discuss@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
	spear-devel@...t.st.com, linus.walleij@...aro.org,
	Vipul Kumar Samar <vipulkumar.samar@...com>
Subject: Re: [PATCH V5 2/2] mfd: stmpe: Update DT support in stmpe driver

On Thu, 06 Dec 2012, Viresh Kumar wrote:

> On 6 December 2012 16:05, Lee Jones <lee.jones@...aro.org> wrote:
> >> > Or you could not put unnecessary bindings into the Device Tree
> >> > by putting two and two together and realise that using the table
> >> > is the correct thing to do instead. This actually gives reason
> >> > to you previous patch, but should probably be fixed-up into it
> >> > so it has some proper meaning/purpose. ;)
> >>
> >> Couldn't understand this one :(
> >
> > Really?
> 
> I tried again, but couldn't get it :(
> 
> > Let's break it down - what do you need "stmpe,id" for?
> 
> To distinguish two instances of of stmpe811 (for instance) on a board.
> Names of stmpe sub-modules would contain .0, .1, if we have an id
> passed to it. Passing -1 would create same names for both gpio blocks
> which belonged to different stmpe811's.

I thought we'd be over this? The 'ID' will be represented by the
address of the chip i.e. stmpe1601@40, where '40' will be
distinguishing factor?

-- 
Lee Jones
Linaro ST-Ericsson Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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