Audio codec device tree entries

[Grant Likely]

On 10/24/07, Timur Tabi <timur at freescale.com> wrote:
> Jon Smirl wrote:
>
> > It makes sense to me, there needs to be some way to trigger loading
> > the fabric driver.
>
> Well, you only really two have choices:
>
> 1) Probe on the AC97/SSI nodes
> 2) When the driver initializes, just scan all the nodes in the device tree (no
> probing).
>
> I think option #2 makes the most sense, because option #1 says that your fabric
> driver is really an AC97 driver, which it isn't.

If you need to scan the tree, don't do it when the driver registers,
do it in the platform code instead.  Otherwise you unconditionally
incur the penalty of scanning the whole device tree on every system
that loads the driver, regardless of whether or not the device is
present.

Cheers,
g.

-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.
grant.likely at secretlab.ca
(403) 399-0195