[alsa-devel] [PATCH 1/4] ASoC: sgtl5000: give it a ramping time before writting

Shawn Guo shawn.guo at linaro.org
Mon Jul 1 16:34:19 CEST 2013

On Mon, Jul 01, 2013 at 10:26:12PM +0800, Shawn Guo wrote:
> On Mon, Jul 01, 2013 at 11:12:48AM -0300, Fabio Estevam wrote:
> > On Mon, Jul 1, 2013 at 7:54 AM, Marek Vasut <marex at denx.de> wrote:
> > 
> > > The delay might also be caused by the I2C driver, I have this in my ToDo to
> > 
> > Yes, this extra delay could be related to the mxs i2c driver, as we do
> > not need to add this delay when using sgtl5000 on other i.mx devices.
> > 
> > Other people have also reported mxs i2c issues currently:
> > http://marc.info/?l=linux-i2c&m=137241339917261&w=2
> > 
> > ,so this may be related some how.
> How does it explain the fact that sgtl5000 read has been working there?
> The sgtl5000 revision has been successfully read out at that point.

And also why we do not see the impact of i2c issue on sgtl5000 before
the offending commit af8ee11 (ASoC: sgtl5000: Fix driver probe after


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