rockchip,pdm.txt

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    1 * Rockchip PDM controller
    2 
    3 Required 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 
   25 Example for rk3328 PDM controller:
   26 
   27 pdm: 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 };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/sound/rockchip,pdm.txt

FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/sound/rockchip,pdm.txt