Document the bindings for MICFIL DAI.
Signed-off-by: Cosmin-Gabriel Samoila <cosmin.samoila@xxxxxxx>
---
.../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";
+};
--
2.7.4
_______________________________________________
Alsa-devel mailing list
Alsa-devel@xxxxxxxxxxxxxxxx
http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
