linux-kernel - Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

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Date:	Wed, 17 Dec 2014 10:44:28 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Alexandre Courbot <gnurou@...il.com>
Cc:	Arnd Bergmann <arnd@...db.de>, Ray Jui <rjui@...adcom.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Grant Likely <grant.likely@...aro.org>,
	Christian Daudt <bcm@...thebug.org>,
	Matt Porter <mporter@...aro.org>,
	Florian Fainelli <f.fainelli@...il.com>,
	Joe Perches <joe@...ches.com>,
	Scott Branden <sbranden@...adcom.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	bcm-kernel-feedback-list@...adcom.com,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v5 1/3] gpio: Cygnus: define Broadcom Cygnus GPIO binding

On Wed, Dec 17, 2014 at 11:45:01AM +0900, Alexandre Courbot wrote:
> Actually we are not that far from being able to do completely without
> any GPIO number, and maybe that's what we should aim for. I think the
> only remaining offender is the sysfs interface.

And that is a user API, and there's lots of users of it (eg, on Raspberry
Pi platforms.)  So changing it isn't going to be easy - I'd say that it's
impractical.

What you're suggesting would be like re-numbering Linux syscalls.

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