linux-kernel - Re: [PATCH 2/2] pinctrl: Add simple pinmux driver using device tree data

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Message-ID: <20120204005539.GI20333@atomide.com>
Date:	Fri, 3 Feb 2012 16:55:39 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Stephen Warren <swarren@...dia.com>,
	Linus Walleij <linus.walleij@...ricsson.com>,
	Barry Song <21cnbao@...il.com>,
	Haojian Zhuang <haojian.zhuang@...vell.com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	Rajendra Nayak <rajendra.nayak@...aro.org>,
	Dong Aisheng <dong.aisheng@...aro.org>,
	Shawn Guo <shawn.guo@...escale.com>,
	Dong Aisheng <dongas86@...il.com>
Subject: Re: [PATCH 2/2] pinctrl: Add simple pinmux driver using device
 tree data

* Linus Walleij <linus.walleij@...aro.org> [120203 14:18]:
> On Fri, Feb 3, 2012 at 9:55 PM, Tony Lindgren <tony@...mide.com> wrote:
> 
> > Add simple pinmux driver using device tree data.
> >
> > Currently this driver only works on omap2+ series of
> > processors, where there is either an 8 or 16-bit mux
> > register for each pin. Support for other similar pinmux
> > controllers could be added.
> 
> So since it's not named pinctrl-omap I guess you intend it
> to be fully generic for simple muxes, which is nice!
> If people start ACK:ing this I will be happy with it too,
> because it's very easy to understand.

Yes the idea is that it should stay generic. I don't know
how easy or hard it would be to enhance it to support
also other type mux cases, like multiple mux registers per
pin, but I guess we'll see.
 
> > Note that this patch does not yet support pinconf_ops
> > or GPIO. Further, alternative mux modes are not yet
> > handled.
> 
> Do you want to evolve the patch for these features
> or do you want to refactor it in later?

Well I'd like to test it a bit more first as I've only
done minimal testing so far. So maybe let's assume there
will be one more iteration at least.

Regards,

Tony
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