Re: [alsa-devel] Fwd: [PATCH 1/1] SPI : spi-pxa2xx : fix spi init of WM510205 codec via ACPI (resend)

[Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>]

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On Tue, Jun 30, 2015 at 09:14:37AM +0200, Christian Hartmann wrote:
> 2015-06-29 11:48 GMT+02:00 Mark Brown <broonie-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>:

> >> [    5.928958] arizona spi-WM510205:00: Unknown device ID: ffff

> > The above is saying that SPI I/O to the device isn't working - the
> > device ID is not being read back successfully.

> Ok that is the next problem that must be solved.
> I have yesterday made a patchset where I have added
> the enum type 5, but as you said already,
> that was not needed.
> All what I see the same: : Unknown device ID: ffff

> So where I have to look now or what can I do to let this device id
> register correctly?
> I hope the baytrail machine driver is easy peasy to add, but here I
> stuck at the moment.

You need to look at the SPI controller configuration still - like I say
that's saying that I/O to the device is not working correctly.  Most
likely there is some meaning to the chip select setting that's being
used and so the main chip select is not doing the job.

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