1* Rockchip PDM controller 2 3Required properties: 4 5- compatible: "rockchip,pdm" 6 - "rockchip,px30-pdm" 7 - "rockchip,rk1808-pdm" 8 - "rockchip,rk3308-pdm" 9- reg: physical base address of the controller and length of memory mapped 10 region. 11- dmas: DMA specifiers for rx dma. See the DMA client binding, 12 Documentation/devicetree/bindings/dma/dma.txt 13- dma-names: should include "rx". 14- clocks: a list of phandle + clock-specifer pairs, one for each entry in clock-names. 15- clock-names: should contain following: 16 - "pdm_hclk": clock for PDM BUS 17 - "pdm_clk" : clock for PDM controller 18- resets: a list of phandle + reset-specifer paris, one for each entry in reset-names. 19- reset-names: reset names, should include "pdm-m". 20- pinctrl-names: Must contain a "default" entry. 21- pinctrl-N: One property must exist for each entry in 22 pinctrl-names. See ../pinctrl/pinctrl-bindings.txt 23 for details of the property values. 24 25Example for rk3328 PDM controller: 26 27pdm: pdm@ff040000 { 28 compatible = "rockchip,pdm"; 29 reg = <0x0 0xff040000 0x0 0x1000>; 30 clocks = <&clk_pdm>, <&clk_gates28 0>; 31 clock-names = "pdm_clk", "pdm_hclk"; 32 dmas = <&pdma 16>; 33 #dma-cells = <1>; 34 dma-names = "rx"; 35 pinctrl-names = "default", "sleep"; 36 pinctrl-0 = <&pdmm0_clk 37 &pdmm0_sdi0 38 &pdmm0_sdi1 39 &pdmm0_sdi2 40 &pdmm0_sdi3>; 41 pinctrl-1 = <&pdmm0_clk_sleep 42 &pdmm0_sdi0_sleep 43 &pdmm0_sdi1_sleep 44 &pdmm0_sdi2_sleep 45 &pdmm0_sdi3_sleep>; 46}; 47