On Tue, Jun 13, 2017 at 03:27:46PM +0800, Sugar Zhang wrote: > The Pulse Density Modulation Interface Controller (PDMC) is > a PDM interface controller and decoder that support PDM format. > It integrates a clock generator driving the PDM microphone > and embeds filters which decimate the incoming bit stream to > obtain most common audio rates. > > Signed-off-by: Sugar Zhang <sugar.zhang@xxxxxxxxxxxxxx> > --- > > .../devicetree/bindings/sound/rockchip,pdm.txt | 39 ++ > sound/soc/rockchip/Kconfig | 9 + > sound/soc/rockchip/Makefile | 2 + > sound/soc/rockchip/rockchip_pdm.c | 516 +++++++++++++++++++++ > sound/soc/rockchip/rockchip_pdm.h | 83 ++++ > 5 files changed, 649 insertions(+) > create mode 100644 Documentation/devicetree/bindings/sound/rockchip,pdm.txt > create mode 100644 sound/soc/rockchip/rockchip_pdm.c > create mode 100644 sound/soc/rockchip/rockchip_pdm.h > > diff --git a/Documentation/devicetree/bindings/sound/rockchip,pdm.txt b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt > new file mode 100644 > index 0000000..921729d > --- /dev/null > +++ b/Documentation/devicetree/bindings/sound/rockchip,pdm.txt > @@ -0,0 +1,39 @@ > +* Rockchip PDM controller > + > +Required properties: > + > +- compatible: "rockchip,pdm" Too generic. This should be SoC specific. > +- 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_fsync > + &pdmm0_sdi0 > + &pdmm0_sdi1 > + &pdmm0_sdi2 > + &pdmm0_sdi3>; > + pinctrl-1 = <&pdmm0_sleep>; > + status = "disabled"; > +}; -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html