[alsa-devel] SGTL5000

[Erik Friesen]

Is this list active?  Can someone at least confirm the alsa-devel
filter isn't kicking my emails out?

I have a couple suggested changes to sgtl5000.c.

On Wed, Feb 3, 2016 at 12:06 PM, Erik Friesen <friesendrywall at gmail.com> wrote:
> I was sort of directed to this list from linux-arm.
>
> I have been working with an embeddedarm ts4900 and built a baseboard
> that uses the sgtl5000.  I also have worked with the RiotBoard, which
> uses the same chip, both using the i.mx6 arm.  I find that
> occasionally the sgtl5000 is resetting, and there is no way to bring
> it back online.  As near as I can tell, the i2c bus comes back alive,
> for example alsamixer communicates fine, coms happen on the i2c bus
> per scope.  However, its obvious the chip never gets re initialized by
> how it acts.
>
> I know the thing shouldn't reset, that is the primary problem, but I
> still want some backup method.  Its probably due to ground bounce from
> a non earth grounded setup.  It could be that using the external
> regulator will help, we will see.
>
> Is there a suggestion on a way the sgtl5000.c could be extended to
> support some sort of re initialize routine?
>
> I am using the embeddedarm repo as a base kernel.  sgtl5000.c has been
> updated to include
> ret = sgtl5000_fill_defaults(sgtl5000);
> but the base kernel is 3.10.53.  However, the riotboard runs 4.3 with
> similar results.