1* Atmel PDMIC driver under ALSA SoC architecture 2 3Required properties: 4- compatible 5 Should be "atmel,sama5d2-pdmic". 6- reg 7 Should contain PDMIC registers location and length. 8- interrupts 9 Should contain the IRQ line for the PDMIC. 10- dmas 11 One DMA specifiers as described in atmel-dma.txt and dma.txt files. 12- dma-names 13 Must be "rx". 14- clock-names 15 Required elements: 16 - "pclk" peripheral clock 17 - "gclk" generated clock 18- clocks 19 Must contain an entry for each required entry in clock-names. 20 Please refer to clock-bindings.txt. 21- atmel,mic-min-freq 22 The minimal frequency that the micphone supports. 23- atmel,mic-max-freq 24 The maximal frequency that the micphone supports. 25 26Optional properties: 27- pinctrl-names, pinctrl-0 28 Please refer to pinctrl-bindings.txt. 29- atmel,model 30 The user-visible name of this sound card. 31 The default value is "PDMIC". 32- atmel,mic-offset 33 The offset that should be added. 34 The range is from -32768 to 32767. 35 The default value is 0. 36 37Example: 38 pdmic@f8018000 { 39 compatible = "atmel,sama5d2-pdmic"; 40 reg = <0xf8018000 0x124>; 41 interrupts = <48 IRQ_TYPE_LEVEL_HIGH 7>; 42 dmas = <&dma0 43 (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) 44 | AT91_XDMAC_DT_PERID(50))>; 45 dma-names = "rx"; 46 clocks = <&pdmic_clk>, <&pdmic_gclk>; 47 clock-names = "pclk", "gclk"; 48 49 pinctrl-names = "default"; 50 pinctrl-0 = <&pinctrl_pdmic_default>; 51 atmel,model = "PDMIC @ sama5d2_xplained"; 52 atmel,mic-min-freq = <1000000>; 53 atmel,mic-max-freq = <3246000>; 54 atmel,mic-offset = <0x0>; 55 }; 56