What is difference between snd_soc_xxx() vs asoc_xxx() ?

Hi ALSA ML Cc Mark

I think ALSA SoC is using 2 type of prefix.

snd_soc_xxx() asoc_xxx()

But, what is difference these two ?

If there was no big clear reasons, I think it is good idea to unify them, because it is confusable. But what do you think ?

Thank you for your help !!

Best regards --- Kuninori Morimoto