Using audio codec pins as gpio. Device tree configuration.

[Anatol Pomozov <anatol.pomozov@xxxxxxxxx>]

Hi

A question that might sound like a nooby one but I cant really google
any useful results.

I want to use audio codec (rt5677) pins as gpio. I need those gpio's
to create a fixed-regulator.

Realtek developers sent a patch that creates gpio_chip for audio codec
pins http://mailman.alsa-project.org/pipermail/alsa-devel/2014-September/081244.html

The next question is how to use these codec pins in DTS. Looking at
other examples I believe my regulator should look like

reg_audio: rt5677_supply {
  compatible = "regulator-fixed";
  regulator-name = "rt5677-supply";
  gpio = <&?????? ???? 0>;
  enable-active-high;
};

And the question what should be used for "gpio" property? I mean what
is the name of gpio controller and what gpio number should be used.
Realtek developers use

rt5677->gpio_chip.base = -1;

that dynamically assigns gpio numbers and I don't really know what
gpio number is used for PIN2 of my audio codec.

Thanks for you reply in advance.
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