| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | * Atmel I2S controller |
| 2 | |
| 3 | Required properties: |
| 4 | - compatible: Should be "atmel,sama5d2-i2s". |
| 5 | - reg: Should be the physical base address of the controller and the |
| 6 | length of memory mapped region. |
| 7 | - interrupts: Should contain the interrupt for the controller. |
| 8 | - dmas: Should be one per channel name listed in the dma-names property, |
| 9 | as described in atmel-dma.txt and dma.txt files. |
| 10 | - dma-names: Two dmas have to be defined, "tx" and "rx". |
| 11 | This IP also supports one shared channel for both rx and tx; |
| 12 | if this mode is used, one "rx-tx" name must be used. |
| 13 | - clocks: Must contain an entry for each entry in clock-names. |
| 14 | Please refer to clock-bindings.txt. |
| 15 | - clock-names: Should be one of each entry matching the clocks phandles list: |
| 16 | - "pclk" (peripheral clock) Required. |
| 17 | - "gclk" (generated clock) Optional (1). |
| 18 | - "muxclk" (I2S mux clock) Optional (1). |
| 19 | |
| 20 | Optional properties: |
| 21 | - pinctrl-0: Should specify pin control groups used for this controller. |
| 22 | - princtrl-names: Should contain only one value - "default". |
| 23 | |
| 24 | |
| 25 | (1) : Only the peripheral clock is required. The generated clock and the I2S |
| 26 | mux clock are optional and should only be set together, when Master Mode |
| 27 | is required. |
| 28 | |
| 29 | Example: |
| 30 | |
| 31 | i2s@f8050000 { |
| 32 | compatible = "atmel,sama5d2-i2s"; |
| 33 | reg = <0xf8050000 0x300>; |
| 34 | interrupts = <54 IRQ_TYPE_LEVEL_HIGH 7>; |
| 35 | dmas = <&dma0 |
| 36 | (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | |
| 37 | AT91_XDMAC_DT_PERID(31))>, |
| 38 | <&dma0 |
| 39 | (AT91_XDMAC_DT_MEM_IF(0) | AT91_XDMAC_DT_PER_IF(1) | |
| 40 | AT91_XDMAC_DT_PERID(32))>; |
| 41 | dma-names = "tx", "rx"; |
| 42 | clocks = <&i2s0_clk>, <&i2s0_gclk>, <&i2s0muxck>; |
| 43 | clock-names = "pclk", "gclk", "muxclk"; |
| 44 | pinctrl-names = "default"; |
| 45 | pinctrl-0 = <&pinctrl_i2s0_default>; |
| 46 | }; |