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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CACRpkdaFv=V8M_Ztb5-hrYm6YnXiG6fg6Z13y3NVFdszBk=7ZQ@mail.gmail.com>
Date:	Sun, 24 Feb 2013 01:47:49 +0100
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Tomasz Figa <tomasz.figa@...il.com>
Cc:	Heiko Stübner <heiko@...ech.de>,
	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 Sun, Feb 24, 2013 at 1:38 AM, Tomasz Figa <tomasz.figa@...il.com> wrote:

> The driver must know whether pin control is available, because it has to
> fall back to legacy GPIO-based pin configuration if it is not. This means
> that we must either check for NULL (which probably is not right, since
> returned handle is considered to be opaque) or pin control core must
> return an error code specific to this situation, e.g. -ENODEV.

OK so pass a flag like a bool in your platform data from the
machine like go into <linux/platform_data/i2c-s3c2410.h>
and add:

struct s3c2410_platform_i2c {
        bool  use_that_old_gpio_interface;
        (...)
};

Instead of trying to semi-guess if the pinctrl framework is there?

Surely you know this when setting up the pdata from your machine?

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/