projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 099343c6 BS |
1 | * Atmel SSC driver. |
| 2 | ||
| 3 | Required 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 | |
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9 | - clock-names: tuple listing input clock names. |
| 10 | Required elements: "pclk" | |
| 11 | - clocks: phandles to input clocks. | |
| 099343c6 | 12 | |
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13 | |
| 14 | Required 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 | ||
| a69d0009 BS |
20 | Optional 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 | ||
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28 | Examples: |
| 29 | - PDC transfer: | |
| 099343c6 BS |
30 | ssc0: ssc@fffbc000 { |
| 31 | compatible = "atmel,at91rm9200-ssc"; | |
| 32 | reg = <0xfffbc000 0x4000>; | |
| 33 | interrupts = <14 4 5>; | |
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34 | clocks = <&ssc0_clk>; |
| 35 | clock-names = "pclk"; | |
| 099343c6 | 36 | }; |
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37 | |
| 38 | - DMA transfer: | |
| 39 | ssc0: ssc@f0010000 { | |
| 40 | compatible = "atmel,at91sam9g45-ssc"; | |
| 41 | reg = <0xf0010000 0x4000>; | |
| 42 | interrupts = <28 4 5>; | |
| 43 | dmas = <&dma0 1 13>, | |
| 44 | <&dma0 1 14>; | |
| 45 | dma-names = "tx", "rx"; | |
| 46 | pinctrl-names = "default"; | |
| 47 | pinctrl-0 = <&pinctrl_ssc0_tx &pinctrl_ssc0_rx>; | |
| 48 | status = "disabled"; | |
| 49 | }; |