Grant Likely wrote:

> Can you not dynamically assign an id?  If alsa soc needs a unique id
> number, then just create a lookup function. 

What I need is something like a hashing function that can convert a "struct 
device_node *" into an "int".  I'm going to have two functions that 
independently parse the device tree and locate a specific node.  Both functions 
will "register the node" with asoc, but they'll use an integer ID to uniquely 
identify the node.

At least, that's the way ASoC likes to operate.  AsoC takes a fixed string plus 
a unique integer.  I could technically create a unique string for each DMA 
device, and have the integer always be 0.

> Something like
> of_asoc_phandle_to_codec_id() that will either return a previously
> assigned id, or will assign a new id.  You shouldn't ever need to add
> data to the tree at runtime.

I know.  It just would have been nice if my nodes already had phandles in them.

-- 
Timur Tabi
Linux kernel developer at Freescale
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