1* Atmel SSC driver. 2 3Required properties: 4- compatible: "atmel,at91rm9200-ssc" or "atmel,at91sam9g45-ssc" 5 - atmel,at91rm9200-ssc: support pdc transfer 6 - atmel,at91sam9g45-ssc: support dma transfer 7- reg: Should contain SSC registers location and length 8- interrupts: Should contain SSC interrupt 9- clock-names: tuple listing input clock names. 10 Required elements: "pclk" 11- clocks: phandles to input clocks. 12 13 14Required properties for devices compatible with "atmel,at91sam9g45-ssc": 15- dmas: DMA specifier, consisting of a phandle to DMA controller node, 16 the memory interface and SSC DMA channel ID (for tx and rx). 17 See Documentation/devicetree/bindings/dma/atmel-dma.txt for details. 18- dma-names: Must be "tx", "rx". 19 20Optional properties: 21 - atmel,clk-from-rk-pin: bool property. 22 - When SSC works in slave mode, according to the hardware design, the 23 clock can get from TK pin, and also can get from RK pin. So, add 24 this parameter to choose where the clock from. 25 - By default the clock is from TK pin, if the clock from RK pin, this 26 property is needed. 27 - #sound-dai-cells: Should contain <0>. 28 - This property makes the SSC into an automatically registered DAI. 29 30Examples: 31- PDC transfer: 32ssc0: ssc@fffbc000 { 33 compatible = "atmel,at91rm9200-ssc"; 34 reg = <0xfffbc000 0x4000>; 35 interrupts = <14 4 5>; 36 clocks = <&ssc0_clk>; 37 clock-names = "pclk"; 38}; 39 40- DMA transfer: 41ssc0: ssc@f0010000 { 42 compatible = "atmel,at91sam9g45-ssc"; 43 reg = <0xf0010000 0x4000>; 44 interrupts = <28 4 5>; 45 dmas = <&dma0 1 13>, 46 <&dma0 1 14>; 47 dma-names = "tx", "rx"; 48 pinctrl-names = "default"; 49 pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>; 50}; 51