[alsa-devel] [PATCH 2/3] ASoC: rt5677: add a platform config option for MICBIAS voltage

[Mark Brown]

On Wed, Dec 10, 2014 at 08:15:26PM -0800, Ben Zhang wrote:

> The MICBIAS voltage for IN1 can be set to 1.476V/2.970V/1.242V/2.475V

The changelog says "platform config" but this is adding DT binding.

> +- realtek,micbias1
> +  Select 0/1/2/3 to set MICBIAS1 voltage to 1.476V/2.970V/1.242V/2.475V
> +

Why is this being specified as some magic number rather than using the
voltage (or at least providing defines for the voltage) - this is going
to do little to make the DT legible and...

> +enum rt5677_micbias {
> +	RT5677_MICBIAS_1_476V = 0,
> +	RT5677_MICBIAS_2_970V = 1,
> +	RT5677_MICBIAS_1_242V = 2,
> +	RT5677_MICBIAS_2_475V = 3,
> +};

...I see there are defined for platform data.
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