The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)

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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/sound/fsl,micfil.txt

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    1 NXP MICFIL Digital Audio Interface (MICFIL).
    2 
    3 The MICFIL digital interface provides a 16-bit audio signal from a PDM
    4 microphone bitstream in a configurable output sampling rate.
    5 
    6 Required properties:
    7 
    8   - compatible          : Compatible list, contains "fsl,imx8mm-micfil"
    9                           or "fsl,imx8mp-micfil"
   10 
   11   - reg                 : Offset and length of the register set for the device.
   12 
   13   - interrupts          : Contains the micfil interrupts.
   14 
   15   - clocks              : Must contain an entry for each entry in clock-names.
   16 
   17   - clock-names         : Must include the "ipg_clk" for register access and
   18                           "ipg_clk_app" for internal micfil clock.
   19 
   20   - dmas                : Generic dma devicetree binding as described in
   21                           Documentation/devicetree/bindings/dma/dma.txt.
   22 
   23 Example:
   24 micfil: micfil@30080000 {
   25         compatible = "fsl,imx8mm-micfil";
   26         reg = <0x0 0x30080000 0x0 0x10000>;
   27         interrupts = <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>,
   28                      <GIC_SPI 110 IRQ_TYPE_LEVEL_HIGH>;
   29         clocks = <&clk IMX8MM_CLK_PDM_IPG>,
   30                  <&clk IMX8MM_CLK_PDM_ROOT>;
   31         clock-names = "ipg_clk", "ipg_clk_app";
   32         dmas = <&sdma2 24 26 0x80000000>;
   33 };

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