[alsa-devel] [PATCH] ASoC: sgtl5000: Do not read registers prior to turning on the supplies

[Fabio Estevam]

On Fri, May 31, 2013 at 12:32 PM, Marek Vasut <marex at denx.de> wrote:

> There was no problem without these patches though. With your patches, I see NAK
> happening on the I2C lines upon first 2-byte write.

Yes, but prior to these patches there were no register writes in sgtl5000.

These addditional writes does work and solve the reset issues on
mx6qsabrelite/mx51evk.

It is only on mx28evk that we have this timeout issue.

I think we need to turn on the SAIF clock (that connects to the
sgtl5000 MCLK) prior to doing the I2C writes.

Regards,

Fabio Estevam