[alsa-devel] [RFC] ucb1400 touchscreen, irq auto probing and ac97 with its private field

[Jaroslav Kysela]

On Fri, 25 Apr 2008, Takashi Iwai wrote:

> Your driver does _not_ know what type it is because the data isn't
> created by your driver but the controller driver.  And, it's free to
> attach your driver to any controller.

But controller knows which codec (using ID bytes) is attached, thus it can 
fill appropriate information only for this codec. Of course, it will work 
when only one additional device is sharing bus with codec. See:

http://www.nxp.com/pip/UCB1400-02.html

						Jaroslav

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Jaroslav Kysela <perex at perex.cz>
Linux Kernel Sound Maintainer
ALSA Project, Red Hat, Inc.