[alsa-devel] [PATCH] ASoC: Add device tree binding for WM8753

[Mark Brown]

On Wed, Aug 10, 2011 at 09:21:16AM +0800, Barry Song wrote:
> 2011/8/9 Mark Brown <broonie at opensource.wolfsonmicro.com>:

> > Oh, if that's the case the driver ought to have device tree bindings
> > which replicate the platform data.  Unless the platform data is
> > sufficiently obscure for hardly anyone to want to use it I guess.

> I guess what Dmitry said is the big ads7846_platform_data structure.

Yes.

>  struct ads7846_platform_data {
>         u16     model;                  /* 7843, 7845, 7846, 7873. */
>         u16     vref_delay_usecs;       /* 0 for external vref; etc */
>         u16     vref_mv;                /* external vref value, milliVolts
>                                          * ads7846: if 0, use internal vref */
>         bool    keep_vref_on;           /* set to keep vref on for differential
>                                          * measurements as well */
>         bool    swap_xy;                /* swap x and y axes */

...

> The structure even has some callbacks which can't be possible in dts.

There's some callbacks but the bulk of the structure (including the bits
I quoted above for example) looks like it's pure data and could sensibly
be represented in the device tree.