Re: [PATCH v10 5/5] [powerpc] Fix up fsl-flexcan device tree binding.

On Wed, Aug 10, 2011 at 01:27:52PM -0500, Scott Wood wrote:

On 08/10/2011 01:23 PM, Wolfgang Grandegger wrote:

quoted

On 08/10/2011 06:00 PM, Robin Holt wrote:

quoted

On Wed, Aug 10, 2011 at 02:36:20PM +0000, U Bhaskar-B22300 wrote:

...

quoted

It looks like the way to do that is to assign a label to those devices
and then associate the label with an alias.  I have no idea how that
works under the hood, but it is the way other files are set up.  Take a
look at arch/powerpc/boot/dts/bamboo.dts for how they define the serial
interfaces.

With a label you mean "label:" at the beginning of a node. Such labels
are translated by the device tree compiler in node handles, which can be
referenced within nodes by using <&label>, e.g.:

UIC0: interrupt-controller0 {
	...
};
UIC1: interrupt-controller1 {
	...
	interrupt-parent = <&UIC0>;
	...
};

It has nothing to do with the name of the node.

"...and then associate the label with an alias."

The alias can then be used if you want "can0" versus "can1".

Does the alias get used by either the kernel or something else or is it
just extra detail with no purpose?

Robin