tree 1ed8997f2f8f023fa3ddf2a244c69ba5434deddd
parent f4589a7d6f477876c18eb8087e3ee7fa0a8655ca
author Simon Glass <sjg@chromium.org> 1328282033 +0000
committer Albert ARIBAUD <albert.u.boot@aribaud.net> 1333001569 +0200

fdt: Add function to allow aliases to refer to multiple nodes

Some devices can deal with multiple compatible properties. The devices
need to know which nodes to bind to which features. For example an
I2C driver which supports two different controller types will want to
know which type it is dealing with in each case.

The new fdtdec_add_aliases_for_id() function deals with this by allowing
the driver to search for additional compatible nodes for a different ID.
It can then detect the new ones and perform appropriate processing.

Another option considered was to return a tuple (node offset, compat id)
and have the function be passed a list of compatible IDs. This is more
overhead for the common case though. We may add such a function later if
more drivers in U-Boot require it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>