[alsa-devel] (SoC) Does i.MX27's SSI work as I2S clock master?

[ngc at drvlabo.jp]

Hello, lists.

Now I'm porting WM8728 driver with i.MX27ADS, based on Freescale's BSP
kernel(2.6.22) and refering to ALSA SoC git repository.

I'm connecting the WM8728 to the SSI2 controller via SSI-3 signal set.
Then, my ADS board has altered:
  i.MX27         WM8728
  ---------------------
  SSI3_CLK       BCLKIN
  SSI3_FS        LRCIN
  SSI3_TXDAT     DIN
  TOUT/SSI2_MCLK  MCLK

Of course, I added some codes to configure GPIO pins as appropriate into
board specific sources.

Then, I'm trying to play sounds via WM8728 and
have not hear any sounds yet.
I checked SSI-3 signal set with an oscilloscope,
no clock signal appears on SSI3_CLK.
I tried the various SSI setting, I2S normal, I2S master,
asychronous/synchronous, normal mode/network mode, ...
But, I can't see clock signal, yet.


I want to know an example setting to act i.MX' SSI as I2S clock master.


Regards,

--------------
NOGUCHI Hiroshi
ngc at drvlabo.jp