linux-kernel - Re: [PATCH] pinctrl: at91-pio4: fix pull-up/down logic

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Message-ID: <CACRpkdbxu4guLjaaMrQ5h1H=4nByuzbSc-aOBdb2S7m8BfZ5Hg@mail.gmail.com>
Date:	Fri, 29 Apr 2016 11:17:08 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Ludovic Desroches <ludovic.desroches@...el.com>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] pinctrl: at91-pio4: fix pull-up/down logic

On Tue, Apr 19, 2016 at 4:03 PM, Ludovic Desroches
<ludovic.desroches@...el.com> wrote:

> The default configuration of a pin is often with a value in the
> pull-up/down field at chip reset. So, even if the internal logic of the
> controller prevents writing a configuration with pull-up and pull-down at
> the same time, we must ensure explicitly this condition before writing the
> register.
>
> This was leading to a pull-down condition not taken into account for
> instance.
>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@...el.com>
> Fixes: 776180848b57 ("pinctrl: introduce driver for Atmel PIO4 controller")
> Cc: stable@...r.kernel.org #v4.4 and later

Patch applied for fixes with the ACKs.

Yours,
Linus Walleij