linux-kernel - Re: [PATCH] [POWERPC] Add i2c pins to dts and board setup

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Date:	Wed, 21 May 2008 10:10:03 -0500
From:	Scott Wood <scottwood@...escale.com>
To:	Jochen Friedrich <jochen@...am.de>
Cc:	Anton Vorontsov <avorontsov@...mvista.com>,
	linuxppc-dev list <linuxppc-dev@...abs.org>,
	"Kernel, Linux" <linux-kernel@...r.kernel.org>,
	Kumar Gala <galak@...nel.crashing.org>,
	Linux I2C <i2c@...sensors.org>,
	Jean Delvare <khali@...ux-fr.org>,
	Paul Mackerras <paulus@...ba.org>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] [POWERPC] Add i2c pins to dts and board setup

On Wed, May 21, 2008 at 12:31:40PM +0200, Jochen Friedrich wrote:
> +   - linux,i2c-index : Can be used to hard code an i2c bus nummer.

s/nummer/number/

Why do we need this?

> +   - linux,i2c-class : Can be used to override the i2c class. The class is used
> +     by old style i2c device drivers to find a bus in a specific context like
> +     system management, video or sound. By default, I2C_CLASS_HWMON (1) is
> +     being used. The definition of the classes can be found in
> +     include/i2c/i2c.h

It'd be better to just convert any needed old-style drivers than add this
to the device tree.

> +   - bus-frequency : Can be used to set the i2c bus frequency. If unspecified,
> +     a default frequency of 60kHz is being used.

clock-frequency is the standard name for such things.

-Scott
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