Re: [alsa-devel] [PATCH 1/2] devicetree: Add devicetree bindings documentation for the ADAU1977

3 Feb 2014

      On Mon, Feb 3, 2014 at 3:57 PM, Lars-Peter Clausen lars@metafoo.de wrote:
...

adi,micbias: Configures the voltage setting for the MICBIAS pin. If not

specified the default value will be 8.5 Volts. This property is only valid
for the ADAU1977.
Valid values for this property are:
  0: 5.0V

  1: 5.5V

  2: 6.0V

  3: 6.5V

  4: 7.0V

  5: 7.5V

  6: 8.0V

  7: 8.5V

  8: 9.0V

This means the casual DTS reader need to know about the meaning of
the values. You can avoid that by:
  1. Using preprocessor defines. Drawback is that you have to add an
     include file.
  2. Using mV, and specify minimum, maximum, and incrementals in the
     bindings, cfr.
Documentation/devicetree/bindings/power_supply/ti,bq24735.txt
     Drawback is that the user can easily specify invalid values.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds