The i.MX8M Nano has supports the MICFIL digital interface.
It's a 16-bit audio signal from a PDM microphone bitstream.
The driver is already in the kernel, but the node is missing.
Add the micfil node.
Signed-off-by: Adam Ford <aford...@gmail.com>
---
V2: Rebase and use generic term audio-controller instead of micfil.
---
arch/arm64/boot/dts/freescale/imx8mn.dtsi | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
index dab246e5abea..a83e87cac96d 100644
--- a/arch/arm64/boot/dts/freescale/imx8mn.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mn.dtsi
@@ -318,6 +318,25 @@ sai6: sai@30060000 {
status = "disabled";
};
+ micfil: audio-controller@30080000 {
+ compatible = "fsl,imx8mm-micfil";
+ reg = <0x30080000 0x10000>;
+ interrupts = <GIC_SPI 109
IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 110
IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 44
IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 45
IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&clk IMX8MN_CLK_PDM_IPG>,
+ <&clk IMX8MN_CLK_PDM_ROOT>,
+ <&clk IMX8MN_AUDIO_PLL1_OUT>,
+ <&clk IMX8MN_AUDIO_PLL2_OUT>,
+ <&clk IMX8MN_CLK_EXT3>;
+ clock-names = "ipg_clk", "ipg_clk_app",
+ "pll8k", "pll11k",
"clkext3";
+ dmas = <&sdma2 24 25 0x80000000>;
+ dma-names = "rx";
+ status = "disabled";
+ };
+
sai7: sai@300b0000 {
compatible = "fsl,imx8mm-sai",
"fsl,imx8mq-sai";
reg = <0x300b0000 0x10000>;
--
2.25.1
