Kernel-4.18.0-80.el8_rockchip,p

• Rockchip PDM controller

Required properties:

• compatible: “rockchip,pdm”
• reg: physical base address of the controller and length of memory mapped
  region.
• dmas: DMA specifiers for rx dma. See the DMA client binding,
  Documentation/devicetree/bindings/dma/dma.txt
• dma-names: should include “rx”.
• clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names.
• clock-names: should contain following:
  • “pdm_hclk”: clock for PDM BUS
  • “pdm_clk” : clock for PDM controller
• pinctrl-names: Must contain a “default” entry.
• pinctrl-N: One property must exist for each entry in

     pinctrl-names. See ../pinctrl/pinctrl-bindings.txt
     for details of the property values.
  

Example for rk3328 PDM controller:

pdm: pdm@ff040000 {
compatible = “rockchip,pdm”;
reg = <0x0 0xff040000 0x0 0x1000>;
clocks = <&clk_pdm>, <&clk_gates28 0>;
clock-names = “pdm_clk”, “pdm_hclk”;
dmas = <&pdma 16>;
#dma-cells = <1>;
dma-names = “rx”;
pinctrl-names = “default”, “sleep”;
pinctrl-0 = <&pdmm0_clk
&pdmm0_sdi0
&pdmm0_sdi1
&pdmm0_sdi2
&pdmm0_sdi3>;
pinctrl-1 = <&pdmm0_clk_sleep
&pdmm0_sdi0_sleep
&pdmm0_sdi1_sleep
&pdmm0_sdi2_sleep
&pdmm0_sdi3_sleep>;
};