[alsa-devel] [PATCH 1/2] devicetree: Add devicetree bindings documentation for the ADAU1977
Geert Uytterhoeven
geert at linux-m68k.org
Mon Feb 3 16:15:24 CET 2014
On Mon, Feb 3, 2014 at 3:57 PM, Lars-Peter Clausen <lars at 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 at 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
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