[alsa-devel] [PATCH v4 2/2] ASoC: nau8825: Show device properties

Mark Brown broonie at kernel.org
Fri Oct 23 17:49:07 CEST 2015


On Thu, Oct 22, 2015 at 06:48:50PM -0700, Ben Zhang wrote:
> On Thu, Oct 22, 2015 at 9:17 AM, Mark Brown <broonie at kernel.org> wrote:

> > Hrm...  we do already have multiple ways of dumping the DT...

> Could you point me to some of the ways of dumping DT? Is there a

The entire device tree is available via /proc/device-tree.

> generic way of dumping device properties provided by ACPI _DSD?

You can also dump the entire ACPI using acpudump from acpica-tools (it
may be packaged under a different name in your distribution).

> Sometimes devices may be flashed with different versions of coreboot
> firmware which contain different _DSD values. When debugging, it's
> helpful to know the exact platform data seen by a codec driver.

Sure, but that's hardly driver specific so the firmwares provide
infrastructure for this.
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