| * 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>; |
| }; |
