[alsa-devel] how to use mcbsp for i2s?

I'm currently working in adding an external codec to the beagleboard, so far the i2c control part is functional, now i want to use mcbsp3 to provide i2s transfers

Is there any way to test the mcbsp to validate the connection?

Also, I've done little modifications to the omap3beagle.c to change from mcbsp2 to mcbsp3, can someone validate this is correct?

In: static int __init omap3beagle_soc_init(void)

I changed to: *(unsigned int *)omap3beagle_dai.cpu_dai->private_data = 2; /* McBSP3 */

It was: *(unsigned int *)omap3beagle_dai.cpu_dai->private_data = 1; /* McBSP2 */

Is this correct? Or it should be changed in other places too?

Thanks