linux-kernel - Re: [PATCH] i2c: s3c2410: check for NULL pinctrl handle

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Message-ID: <CACRpkdbV-CznfnbCbKkKpndjiG32V9yNdrF1F7M=4qe1EUroGA@mail.gmail.com>
Date:	Sun, 24 Feb 2013 01:16:21 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Heiko Stübner <heiko@...ech.de>
Cc:	Wolfram Sang <wsa@...-dreams.de>, linux-kernel@...r.kernel.org,
	Kukjin Kim <kgene.kim@...sung.com>,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org, linux-i2c@...r.kernel.org,
	Tomasz Figa <t.figa@...sung.com>
Subject: Re: [PATCH] i2c: s3c2410: check for NULL pinctrl handle

On Sat, Feb 23, 2013 at 6:57 PM, Heiko Stübner <heiko@...ech.de> wrote:

> When pinctrl is not built the fallback functions fail silently
> and emit either 0 error codes or NULL pinctrl handles.
>
> Therefore it's needed to also check for this NULL-handle when
> falling back to parsing the i2c gpios from devicetree.
>
> Signed-off-by: Heiko Stuebner <heiko@...ech.de>

NAK.

This is not the right solution for this driver.

It uses pinctrl in a very simplistic way, just grabbing the
default handler.

After commit
ab78029ecc347debbd737f06688d788bd9d60c1d:
"drivers/pinctrl: grab default handles from device core"

The right solution is to simply revert commit
2693ac69880a33d4d9df6f128415b65e745f00ba
"i2c: s3c2410: Add support for pinctrl"

Tomasz are you OK with this, or will you add more
fine-grained pinctrl (like runtime PM etc) to this driver?

Yours,
Linus Walleij
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