Kernel-4.18.0-80.el8_atmel-pdmic

• Atmel PDMIC driver under ALSA SoC architecture

Required properties:

• compatible
  Should be “atmel,sama5d2-pdmic”.
• reg
  Should contain PDMIC registers location and length.
• interrupts
  Should contain the IRQ line for the PDMIC.
• dmas
  One DMA specifiers as described in atmel-dma.txt and dma.txt files.
• dma-names
  Must be “rx”.
• clock-names
  Required elements:
  • “pclk” peripheral clock
  • “gclk” generated clock
• clocks
  Must contain an entry for each required entry in clock-names.
  Please refer to clock-bindings.txt.
• atmel,mic-min-freq
  The minimal frequency that the micphone supports.
• atmel,mic-max-freq
  The maximal frequency that the micphone supports.

Optional properties:

• pinctrl-names, pinctrl-0
  Please refer to pinctrl-bindings.txt.
• atmel,model
  The user-visible name of this sound card.
  The default value is “PDMIC”.
• atmel,mic-offset
  The offset that should be added.
  The range is from -32768 to 32767.
  The default value is 0.

Example:
pdmic@f8018000 {
compatible = “atmel,sama5d2-pdmic”;
reg = <0xf8018000 0x124>;
interrupts = <48 IRQ_TYPE_LEVEL_HIGH 7>;
dmas = <&dma0
(AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1)
| AT91_XDMAC_DT_PERID(50))>;
dma-names = “rx”;
clocks = <&pdmic_clk>, <&pdmic_gclk>;
clock-names = “pclk”, “gclk”;

            pinctrl-names = "default";
            pinctrl-0 = <&pinctrl_pdmic_default>;
            atmel,model = "PDMIC @ sama5d2_xplained";
            atmel,mic-min-freq = <1000000>;
            atmel,mic-max-freq = <3246000>;
            atmel,mic-offset = <0x0>;
};