linux-kernel - Re: [PATCH v2 1/5] pinctrl: imx: detect uninitialized pins

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Message-ID: <20140925021547.GA6405@dragon>
Date:	Thu, 25 Sep 2014 10:15:49 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Stefan Agner <stefan@...er.ch>
CC:	<linus.walleij@...aro.org>, <gnurou@...il.com>,
	<kernel@...gutronix.de>, <linux-gpio@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <bpringlemeir@...ps.com>
Subject: Re: [PATCH v2 1/5] pinctrl: imx: detect uninitialized pins

On Tue, Sep 23, 2014 at 07:37:53PM +0200, Stefan Agner wrote:
> The pinctrl driver initialized the register offsets for the pins
> with 0. On Vybrid an offset of 0 is a valid offset for the pinctrl
> mux register. So far, this was solved using the ZERO_OFFSET_VALID
> flag which allowed offsets of 0. However, this does not allow to
> verify whether a pins struct imx_pmx_func was initialized or not.
> 
> Use signed offset values for register offsets and initialize those
> with -1 in order to detect uninitialized offset values reliable.
> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>

Acked-by: Shawn Guo <shawn.guo@...escale.com>
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