On Wed, Dec 19, 2012 at 02:33:58PM -0200, Fabio Estevam wrote:

> I am working on adding audio support to mx6qsabresd board, which
> contains a wm8962 codec.

Without seeing your code or knowing which kernel version you're running
it's a bit hard to comment...

> wm8962 0-001a: wm8962->lrclk = 44100
> wm8962 0-001a: Selected sysclk ratio 256
> wm8962 0-001a: read 4 => ffffffff
> wm8962 0-001a: Failed to read DSPCLK: -1

This suggests that physical I/O to the device isn't working.  Is it
clocked and powered?

> wm8962 0-001a: read 3 => 100
> wm8962 0-001a: write 3 = 100
> wm8962 0-001a: ASoC: POST_PMU: HPOUTR PGA event failed: -5

You've not enabled any of the debug in the driver...  it might give you
some hints.