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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/fsl,micfil.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: NXP MICFIL Digital Audio Interface (MICFIL)
maintainers:
- Shengjiu Wang <shengjiu.wang@nxp.com>
description: |
The MICFIL digital interface provides a 16-bit or 24-bit audio signal
from a PDM microphone bitstream in a configurable output sampling rate.
properties:
compatible:
enum:
- fsl,imx8mm-micfil
- fsl,imx8mp-micfil
reg:
maxItems: 1
interrupts:
items:
- description: Digital Microphone interface interrupt
- description: Digital Microphone interface error interrupt
- description: voice activity detector event interrupt
- description: voice activity detector error interrupt
dmas:
items:
- description: DMA controller phandle and request line for RX
dma-names:
items:
- const: rx
clocks:
items:
- description: The ipg clock for register access
- description: internal micfil clock
- description: PLL clock source for 8kHz series
- description: PLL clock source for 11kHz series
- description: External clock 3
minItems: 2
clock-names:
items:
- const: ipg_clk
- const: ipg_clk_app
- const: pll8k
- const: pll11k
- const: clkext3
minItems: 2
required:
- compatible
- reg
- interrupts
- dmas
- dma-names
- clocks
- clock-names
additionalProperties: false
examples:
- |
#include <dt-bindings/interrupt-controller/arm-gic.h>
#include <dt-bindings/clock/imx8mm-clock.h>
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 IMX8MM_CLK_PDM_IPG>,
<&clk IMX8MM_CLK_PDM_ROOT>;
clock-names = "ipg_clk", "ipg_clk_app";
dmas = <&sdma2 24 25 0>;
dma-names = "rx";
};
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