On Fri, Mar 17, 2017 at 03:08:23PM +0100, Arnaud Pouliquen wrote:
> Add bindings that describes audio settings to support
> Digital Filter for pulse density modulation(PDM) microphone.
>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
> ---
> V2->V3:
> Fixes based on V2 comments
>
> .../devicetree/bindings/sound/st,stm32-adfsdm.txt | 41 ++++++++++++++++++++++
> 1 file changed, 41 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt
>
> diff --git a/Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt b/Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt
> new file mode 100644
> index 0000000..ab610bc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/st,stm32-adfsdm.txt
> @@ -0,0 +1,40 @@
> +STMicroelectronics audio DFSDM DT bindings
> +
> +This driver supports audio PDM microphone capture through Digital Filter format
> +Sigma Delta modulators (DFSDM).
> +
> +Required properties:
> + - compatible: "st,stm32h7-adfsdm".
> +
> + - #sound-dai-cells : Must be equal to 0
> +
> + - io-channels : phandle to iio dfsdm instance node.
> +
> +
> +Example of a simple sound card using audio DFSDM node.
> +
> + dmic0: dmic_@0 {
Drop the '_' and unit address.
> + compatible = "dmic-codec";
> + #sound-dai-cells = <0>;
> + };
> +
> + asoc-pdm@0 {
asoc is a Linux term. Drop the unit address.
> + compatible = "st,stm32h7-adfsdm";
Is this a separate block from the ADC? A drawing of the h/w blocks and
connections would help.
> + #sound-dai-cells = <0>;
> + io-channels = <&dfsdm_adc0 0>;
> + };
> +
> + sound_dfsdm_pdm {
sound-card {
> + compatible = "simple-audio-card";
> + simple-audio-card,name = "dfsdm_pdm";
> +
> + dfsdm0_mic0: simple-audio-card,dai-link@0 {
I'd suggest moving to the graph card.
> + format = "pdm";
> + cpu {
> + sound-dai = <&asoc_pdm1>;
This phandle doesn't point to anything.
> + };
> + dmic0_codec: codec {
> + sound-dai = <&dmic0>;
> + };
> + };
> + };
> \ No newline at end of file
^^^
> --
> 1.9.1
>
--
To unsubscribe from this list: send the line "unsubscribe linux-iio" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
