[alsa-devel] [PATCH 1/2] devicetree: Add devicetree bindings documentation for the ADAU1977
lars at metafoo.de
Tue Feb 4 12:48:47 CET 2014
On 02/03/2014 04:15 PM, Geert Uytterhoeven wrote:
> 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.
> Drawback is that the user can easily specify invalid values.
Is there a preference for either of them?
More information about the Alsa-devel