linux-kernel - Re: [PATCH v3 2/3] gpio: pca953x: add support for pca9505

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Date:	Fri, 25 Jan 2013 09:51:47 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Haojian Zhuang <haojian.zhuang@...aro.org>
Cc:	Grant Likely <grant.likely@...retlab.ca>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Andreas Schallenberg <Andreas.Schallenberg@...itytechnica.com>,
	Roland Stigge <stigge@...com.de>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/3] gpio: pca953x: add support for pca9505

On Fri, Jan 25, 2013 at 9:36 AM, Gregory CLEMENT
<gregory.clement@...e-electrons.com> wrote:

> Well, at the beginning I thought adding support for pca9505 was just a matter
> of a couple of lines to add. Then I realized that I need to handle the 40 bits
> case, and I ended up refactoring all access to the registers. So now I am on it,
> it seems I am volunteer to continue to improve this driver.

I like the sound of this ;-)

To get you started I just sent out two other patches you can consider
as RFC, they're regrettably not even compile-tested. I mainly wanted
to indicate what needs to be done so we can throw them away, just
wanted to give a hint.

> However I won't be able to test it, the only PXA based platform I have is a
> Zaurus SL-C3100 which embeds a PXA270 if I remember well, but I doubt it come
> with gpio expander on i2c.

Well I guess if there is nobody testing it, then nobody cares.
The world must be full of people with PXA platforms doing nothing
but regression testing...

Actually just days ago I asked Haoijan to help me testing a set of
patches for the PXA SPI controller, and he kindly helped out, so there
are some people booting these platforms, sometimes :-)

Yours,
Linus Walleij
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