[alsa-devel] Non-I2C/SPI ASoC codec

Matthew Bucknall matthew.bucknall at gmail.com
Thu Jul 3 13:14:07 CEST 2014


Hi,

I'm trying to get audio support for a custom ARM board to work and have
written codec and machine drivers - The platform driver already existed
(atmel_ssc_dai). The codec I am supporting is extremely simple and has no
SPI/I2C interface for configuration and just accepts fixed format/fixed
rate I2S.

Previously, when I've gotten ASoC support for another board working, the
codec it used (TLV320AIC32) had an I2C interface. Declaring I2C_BOARD_INFO
for this in my board file seemed sufficient to get the machine driver to
probe and initialize. For this new board, I have no SPI/I2C device to
declare in the board file and its associated machine driver is not probing.
All I get from the kernel is 'No soundcards found.'

My driver modules are getting compiled and are linked statically. What do I
need to do to get the machine driver going?

Matt.


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