Re: [RFC] [PATCH] Device Tree on ARM platform

Benjamin Herrenschmidt
2009-05-28T07:52:22Z

On Thu, 2009-05-28 at 01:57 +0200, Robert Schwebel wrote:
> 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?

Easy, add properties for them in the node for that device ! The
device-tree actually makes that really easy, a lot easier than anything
else I've seen so far.

Cheers,
Ben.