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+* Rockchip PDM controller
+
+Required properties:
+
+- compatible: "rockchip,pdm"
+ - "rockchip,px30-pdm"
+ - "rockchip,rk1808-pdm"
+ - "rockchip,rk3308-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
+- resets: a list of phandle + reset-specifer paris, one for each entry in reset-names.
+- reset-names: reset names, should include "pdm-m".
+- 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>;
+};