On Thu, Dec 17, 2015 at 05:50:00PM +0800, Songjun Wu wrote:
> DT binding documentation for this new ASoC driver.
>
> Signed-off-by: Songjun Wu <songjun.wu@xxxxxxxxx>
> ---
>
> Changes in v2: None
>
> .../devicetree/bindings/sound/atmel-pdmic.txt | 55 ++++++++++++++++++++
> 1 file changed, 55 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/sound/atmel-pdmic.txt
>
> diff --git a/Documentation/devicetree/bindings/sound/atmel-pdmic.txt b/Documentation/devicetree/bindings/sound/atmel-pdmic.txt
> new file mode 100644
> index 0000000..e0875f1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/atmel-pdmic.txt
> @@ -0,0 +1,55 @@
> +* Atmel PDMIC driver under ALSA SoC architecture
> +
> +Required properties:
> +- compatible
> + Should be "atmel,sama5d2-pdmic".
> +- reg
> + Should contain PDMIC registers location and length.
> +- interrupts
> + Should contain the IRQ line for the PDMIC.
> +- dmas
> + One DMA specifiers as described in atmel-dma.txt and dma.txt files.
> +- dma-names
> + Must be "rx".
> +- clock-names
> + Required elements:
> + - "pclk" peripheral clock
> + - "gclk" generated clock
> +- clocks
> + Must contain an entry for each required entry in clock-names.
> + Please refer to clock-bindings.txt.
> +- atmel,mic-min-freq
> + The minimal frequency that the micphone supports.
> +- atmel,mic-max-freq
> + The maximal frequency that the micphone supports.
Please append units to these 2 (-hz).
> +Optional properties:
> +- pinctrl-names, pinctrl-0
> + Please refer to pinctrl-bindings.txt.
> +- atmel,model
> + The user-visible name of this sound card.
> + The default value is "PDMIC".
When and why would this be different than the default?
"label" can be used here if this is really needed.
> +- atmel,mic-offset
> + The offset that should be added.
> + The range is from -32768 to 32767.
> + The default value is 0.
> +
> +Example:
> + pdmic@f8018000 {
> + compatible = "atmel,sama5d2-pdmic";
> + reg = <0xf8018000 0x124>;
> + interrupts = <48 IRQ_TYPE_LEVEL_HIGH 7>;
> + dmas = <&dma0
> + (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
> + | AT91_XDMAC_DT_PERID(50))>;
> + dma-names = "rx";
> + clocks = <&pdmic_clk>, <&pdmic_gclk>;
> + clock-names = "pclk", "gclk";
> +
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_pdmic_default>;
> + atmel,model = "PDMIC @ sama5d2_xplained";
> + atmel,mic-min-freq = <1000000>;
> + atmel,mic-max-freq = <3246000>;
> + atmel,mic-offset = <0x0>;
> + };
> --
> 1.7.9.5
>
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