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

Fabio Estevam festevam at gmail.com
Fri May 31 17:36:43 CEST 2013

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

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.


Fabio Estevam

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