On 15/02/17 16:55, Fabrice Gasnier wrote:
> Add documentation for 'st,adc-res' dt optional property.
>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@xxxxxx>
I'm happy with this, but would like to leave time for a device tree review.
Ultimately we may well want to make this a generic property and call it something
like adc-resolution but perhaps we need to wait until we have a few more devices
supporting setting it via device tree to figure out what the best interface is.
It would exactly be a problem to support this as a deprecated binding at that
point.
Give me a poke if we hear nothing from Rob or Mark for say another week.
Thanks,
Jonathan
> ---
> Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
> index 5dfc88e..45f7ff2 100644
> --- a/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
> +++ b/Documentation/devicetree/bindings/iio/adc/st,stm32-adc.txt
> @@ -57,6 +57,9 @@ Optional properties:
> - dmas: Phandle to dma channel for this ADC instance.
> See ../../dma/dma.txt for details.
> - dma-names: Must be "rx" when dmas property is being used.
> +- st,adc-res: Resolution (bits) to use for conversions. Must match device
> + available resolutions (e.g. can be 6, 8, 10 or 12 on stm32f4). Default
> + is maximum resolution if unset.
>
> Example:
> adc: adc@40012000 {
> @@ -84,6 +87,7 @@ Example:
> st,adc-channels = <8>;
> dmas = <&dma2 0 0 0x400 0x0>;
> dma-names = "rx";
> + st,adc-res = <8>;
> };
> ...
> other adc child nodes follow...
>
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