linux-kernel - Re: [RFC] [PATCH] Device Tree on ARM platform

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Date:	Thu, 28 May 2009 01:57:05 +0200
From:	Robert Schwebel <r.schwebel@...gutronix.de>
To:	Grant Likely <grant.likely@...retlab.ca>
Cc:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	devicetree-discuss <devicetree-discuss@...abs.org>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	Jon Smirl <jonsmirl@...il.com>,
	Scott Wood <scottwood@...escale.com>,
	Janboe Ye <yuan-bo.ye@...orola.com>,
	Timur Tabi <timur@...escale.com>
Subject: Re: [RFC] [PATCH] Device Tree on ARM platform

On Wed, May 27, 2009 at 02:22:50PM -0600, Grant Likely wrote:
> 2) Driver binding mechanism:  device tree nodes usually have a
> "compatible" property which is a list of strings. The first string
> describes exactly what the device is (ie. "atmel,24c08") and an
> optional list of other devices which it is register interface
> backwards compatible with.

This is a good example. The "exact" description above doesn't say
anything about some of the details the driver needs to know. Here is the
at24 driver:

http://lxr.linux.no/linux+v2.6.29/include/linux/i2c/at24.h#L18

Where do we get the page size & flags from?

rsc
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