Document the bindings for MICFIL DAI.
Signed-off-by: Cosmin-Gabriel Samoila cosmin.samoila@nxp.com --- .../devicetree/bindings/sound/fsl,micfil.txt | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/fsl,micfil.txt
diff --git a/Documentation/devicetree/bindings/sound/fsl,micfil.txt b/Documentation/devicetree/bindings/sound/fsl,micfil.txt new file mode 100644 index 0000000..2aa4526 --- /dev/null +++ b/Documentation/devicetree/bindings/sound/fsl,micfil.txt @@ -0,0 +1,38 @@ +NXP MICFIL Digital Audio Interface (MICFIL). + +The MICFIL digital interface provides a 16-bit audio signal from a PDM +microphone bitstream in a configurable output sampling rate. + +Required properties: + + - compatible : Compatible list, contains "fsl,imx8mm-micfil" + + - reg : Offset and length of the register set for the device. + + - interrupts : Contains the micfil interrupts. + + - clocks : Must contain an entry for each entry in clock-names. + + - clock-names : Must include the "ipg_clk" for register access and + "ipg_clk_app" for internal micfil clock. + + - dmas : Generic dma devicetree binding as described in + Documentation/devicetree/bindings/dma/dma.txt. + + - dma-names : One "rx" dma must be configured. + +Example: +micfil: micfil@30080000 { + compatible = "fsl,imx8mm-micfil"; + reg = <0x0 0x30080000 0x0 0x10000>; + interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 45 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>, + <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&clk IMX8MM_CLK_PDM_IPG>, + <&clk IMX8MM_CLK_PDM_ROOT>; + clock-names = "ipg_clk", "ipg_clk_app"; + dmas = <&sdma2 24 26 0x80000000>; + dma-names = "rx"; + status = "disabled"; +};