Re: [alsa-devel] [PATCH v2 1/3] ASoC: codecs: wm8904: add dt ids table

[Bo Shen <voice.shen@xxxxxxxxx>]

Hi Mark, Lars-Perter,

On 01/27/2015 12:49 AM, Lars-Peter Clausen wrote:
> On 01/26/2015 05:42 PM, Mark Brown wrote:
> > On Mon, Jan 26, 2015 at 04:24:38PM +0100, Nicolas Ferre wrote:
> > > Le 16/01/2015 02:17, Bo Shen a écrit :
> >
> > > > > Does this end up in the i2c_driver_id driver data or do we need some
> > > > > extra code when devtype is assigned to check for an of_node and
> > > > > look at
> > > > > the DT data instead?  That certainly used to be the case...
> >
> > > > At the beginning I think as the same as you, and also add the code to
> > > > get the data as I do in <drivers/misc/atmel-ssc.c>. However, as I
> > > > remember, I2C seems only use the compatible string after the comma,
> > > > that
> > > > means only for "wlf,wm8904", it uses "wm8904" to match. So, I remove
> > > > all
> > > > the code I added, and just keep these, and it can get the device type
> > > > correctly.
> >
> > > > So, when I submit the patch and keep the code as simple as possible.
> >
> > > I don't understand what's keeping this patch from being applied. Voice,
> > > do you mind re-sending?
> >
> > I need to convince myself that the above actually works and is doing the
> > right thing; the above explanation sounds like if it works it might be
> > relying on a bug.
>
> I'd call it a undocumented feature. But I wouldn't rely on it being
> around for ever. In my opinion to be future proof the driver should
> explicitly handle the OF case in the probe function.

I will add this into probe function in next version.
Thanks.

Best Regards,
Bo Shen
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