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50 lines
1.7 KiB
50 lines
1.7 KiB
* Atmel SSC driver. |
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Required properties: |
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- compatible: "atmel,at91rm9200-ssc" or "atmel,at91sam9g45-ssc" |
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- atmel,at91rm9200-ssc: support pdc transfer |
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- atmel,at91sam9g45-ssc: support dma transfer |
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- reg: Should contain SSC registers location and length |
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- interrupts: Should contain SSC interrupt |
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- clock-names: tuple listing input clock names. |
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Required elements: "pclk" |
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- clocks: phandles to input clocks. |
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Required properties for devices compatible with "atmel,at91sam9g45-ssc": |
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- dmas: DMA specifier, consisting of a phandle to DMA controller node, |
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the memory interface and SSC DMA channel ID (for tx and rx). |
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See Documentation/devicetree/bindings/dma/atmel-dma.txt for details. |
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- dma-names: Must be "tx", "rx". |
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Optional properties: |
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- atmel,clk-from-rk-pin: bool property. |
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- When SSC works in slave mode, according to the hardware design, the |
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clock can get from TK pin, and also can get from RK pin. So, add |
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this parameter to choose where the clock from. |
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- By default the clock is from TK pin, if the clock from RK pin, this |
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property is needed. |
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- #sound-dai-cells: Should contain <0>. |
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- This property makes the SSC into an automatically registered DAI. |
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Examples: |
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- PDC transfer: |
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ssc0: ssc@fffbc000 { |
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compatible = "atmel,at91rm9200-ssc"; |
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reg = <0xfffbc000 0x4000>; |
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interrupts = <14 4 5>; |
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clocks = <&ssc0_clk>; |
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clock-names = "pclk"; |
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}; |
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- DMA transfer: |
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ssc0: ssc@f0010000 { |
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compatible = "atmel,at91sam9g45-ssc"; |
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reg = <0xf0010000 0x4000>; |
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interrupts = <28 4 5>; |
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dmas = <&dma0 1 13>, |
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<&dma0 1 14>; |
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dma-names = "tx", "rx"; |
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pinctrl-names = "default"; |
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pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>; |
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};
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