linux-kernel - Re: [PATCH 0/6] pinctrl: pxa: add pxa27x pin control support

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Date:	Mon, 30 Nov 2015 14:05:35 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Robert Jarzmik <robert.jarzmik@...e.fr>,
	Haojian Zhuang <haojian.zhuang@...il.com>
Cc:	Daniel Mack <daniel@...que.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 0/6] pinctrl: pxa: add pxa27x pin control support

On Sat, Nov 21, 2015 at 7:04 PM, Robert Jarzmik <robert.jarzmik@...e.fr> wrote:

> I've been working on this for some time now, it's time pxa archtecture gets a
> proper pin control support.
>
> This serie provides support for pxa27x architecture, and paves the way to pxa2xx
> one. I've tested this on my pxa27x board, in both device-tree and non
> device-tree builds.

So in 2013 Haojian removed PXA3xx, MMP2, PXA168 and PXA910 in favor
of using pinctrl-single.c shared with OMAP.

See
commit 62194200e5e383af2085faf35b6f009364446069
"pinctrl: remove pxa pinctrl driver"

What makes the PXA27x so different from its siblings that it still
warrants its own driver? Why can this one not use pinctrl-single
as well?

Yours,
Linus Walleij
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