linux-kernel - Re: [PATCH 0/2] get pinctrl more flexible for per pin muxing controllers

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Message-ID: <20150610150000.GR25800@odux.rfo.atmel.com>
Date:	Wed, 10 Jun 2015 17:00:00 +0200
From:	Ludovic Desroches <ludovic.desroches@...el.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	Linus Walleij <linus.walleij@...aro.org>,
	Nicolas Ferre <nicolas.ferre@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	Ludovic Desroches <ludovic.desroches@...el.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/2] get pinctrl more flexible for per pin muxing
 controllers

On Wed, Jun 10, 2015 at 08:14:50AM -0600, Stephen Warren wrote:
> On 06/10/2015 01:33 AM, Linus Walleij wrote:
> >On Wed, Jun 3, 2015 at 3:31 PM, Nicolas Ferre <nicolas.ferre@...el.com> wrote:
> >>Le 04/05/2015 10:56, Ludovic Desroches a écrit :
> >>>
> >>>The way pins, groups and functions are tied is too constraining for some
> >>>controllers. It concerns mainly the ones we don't care about groups and
> >>>functions, each pin can be muxed to any functions.
> >>>The goal of these two patches is too remove some of the constraints.
> >>>
> >>>I have added the prototype of a pin controller and device tree to show the
> >>>way I want to use these changes. I couldn't test it on boards using generic
> >>>pinconf so I am not sure that I don't break something...
> >>>
> >>>
> >>>Ludovic Desroches (4):
> >>>   pinctrl: change function behavior for per pin muxing controllers
> >>>   pinctrl: introduce complex pin description
> >>
> >>Linus,
> >>
> >>Ludovic sent this series nearly one month ago. It was posted after a RFC
> >>series on the same topic two months ago. As we don't see any comment on
> >>neither of them we assume that it's okay to include them.
> >
> >It's a quite big patch and I need help reviewing it and thinking of
> >some possible consequences.
> >
> >Stephen, can you give me a hand with this?
> 
> I don't have the patch in my list archive, which goes back 60 days.
> 
> Judging purely by the patch description, the patch sounds incorrect. There's
> nothing in pinctrl that prevents a particular pin controller from supporting
> all mux functions on all pins or groups. Simply return the same list of
> functions for every pin.

Maybe my description is not accurate. I'll resend it.


Ludovic
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