linux-kernel - Re: An extremely simplified pinctrl bindings proposal

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Message-ID: <20120206210456.GV1426@atomide.com>
Date:	Mon, 6 Feb 2012 13:04:56 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Linus Walleij <linus.walleij@...aro.org>
Cc:	Stephen Warren <swarren@...dia.com>,
	Dong Aisheng <dongas86@...il.com>,
	Shawn Guo <shawn.guo@...aro.org>,
	Dong Aisheng-B29396 <B29396@...escale.com>,
	"Sascha Hauer (s.hauer@...gutronix.de)" <s.hauer@...gutronix.de>,
	"rob.herring@...xeda.com" <rob.herring@...xeda.com>,
	"kernel@...gutronix.de" <kernel@...gutronix.de>,
	"cjb@...top.org" <cjb@...top.org>,
	"Simon Glass (sjg@...omium.org)" <sjg@...omium.org>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	"Grant Likely (grant.likely@...retlab.ca)" 
	<grant.likely@...retlab.ca>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: An extremely simplified pinctrl bindings proposal

* Linus Walleij <linus.walleij@...aro.org> [120206 11:25]:
> On Mon, Feb 6, 2012 at 8:03 PM, Tony Lindgren <tony@...mide.com> wrote:
> 
> > So far the only
> > change needed for pinctrl drivers containing no data is that
> > we should make the string names optional and structure debugfs
> > around the physical register addresses instead. I'm basically
> > just setting the mux register physcal address as the pin name
> > for now to work around this.
> 
> OK please make a patch to do it really optional in the core if
> you find the time, it seems like a good change anyway, because
> it will make it possible to reduce some current pin name lists
> quite easily.

OK, will take a look at that.

> If you need to change the layout of debugfs just do it.
> 
> I actually had something like unnamed pins in the early patches
> to register a bunch of anonymous pins ranges, so why not bring
> it back in.

Yeah it seems that the mux registers should be listed, it might
require a little bit of thinking for cases where one register
controls multiple pins. So maybe we need just a new entry for
mux registers?

Regards,

Tony
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