[alsa-devel] ASoC: of_parse_phandle techniques newbie question

[Matt Flax]

Hi there,

In implementing a codec/driver combination, I found that I have to 
re-write some of the snd_soc_dai_link with device tree related entries :
http://mailman.alsa-project.org/pipermail/alsa-devel/2014-August/080034.html

Can anyone explain to me why we have to do this, a little confused here ?
For example :

          driver_dai.codec_name = NULL;
          driver_dai.codec_of_node = of_parse_phandle(np, .....

Why can't the codec be found from the codec_name which matches the 
previously probed codec ?

thanks
Matt