| Padmavathi Venna | 40476f6 | 2013-01-18 17:17:01 +0530 | [diff] [blame] | 1 | * Samsung I2S controller |
| 2 | |
| 3 | Required SoC Specific Properties: |
| 4 | |
| 5 | - compatible : "samsung,i2s-v5" |
| 6 | - reg: physical base address of the controller and length of memory mapped |
| 7 | region. |
| 8 | - dmas: list of DMA controller phandle and DMA request line ordered pairs. |
| 9 | - dma-names: identifier string for each DMA request line in the dmas property. |
| 10 | These strings correspond 1:1 with the ordered pairs in dmas. |
| 11 | |
| 12 | Optional SoC Specific Properties: |
| 13 | |
| 14 | - samsung,supports-6ch: If the I2S Primary sound source has 5.1 Channel |
| 15 | support, this flag is enabled. |
| 16 | - samsung,supports-rstclr: This flag should be set if I2S software reset bit |
| 17 | control is required. When this flag is set I2S software reset bit will be |
| 18 | enabled or disabled based on need. |
| 19 | - samsung,supports-secdai:If I2S block has a secondary FIFO and internal DMA, |
| 20 | then this flag is enabled. |
| 21 | - samsung,idma-addr: Internal DMA register base address of the audio |
| 22 | sub system(used in secondary sound source). |
| 23 | |
| 24 | Required Board Specific Properties: |
| 25 | |
| 26 | - gpios: The gpio specifier for data out,data in, LRCLK, CDCLK and SCLK |
| 27 | interface lines. The format of the gpio specifier depends on the gpio |
| 28 | controller. |
| 29 | The syntax of samsung gpio specifier is |
| 30 | <[phandle of the gpio controller node] |
| 31 | [pin number within the gpio controller] |
| 32 | [mux function] |
| 33 | [flags and pull up/down] |
| 34 | [drive strength]> |
| 35 | |
| 36 | Example: |
| 37 | |
| 38 | - SoC Specific Portion: |
| 39 | |
| 40 | i2s@03830000 { |
| 41 | compatible = "samsung,i2s-v5"; |
| 42 | reg = <0x03830000 0x100>; |
| 43 | dmas = <&pdma0 10 |
| 44 | &pdma0 9 |
| 45 | &pdma0 8>; |
| 46 | dma-names = "tx", "rx", "tx-sec"; |
| 47 | samsung,supports-6ch; |
| 48 | samsung,supports-rstclr; |
| 49 | samsung,supports-secdai; |
| 50 | samsung,idma-addr = <0x03000000>; |
| 51 | }; |
| 52 | |
| 53 | - Board Specific Portion: |
| 54 | |
| 55 | i2s@03830000 { |
| 56 | gpios = <&gpz 0 2 0 0>, /* I2S_0_SCLK */ |
| 57 | <&gpz 1 2 0 0>, /* I2S_0_CDCLK */ |
| 58 | <&gpz 2 2 0 0>, /* I2S_0_LRCK */ |
| 59 | <&gpz 3 2 0 0>, /* I2S_0_SDI */ |
| 60 | <&gpz 4 2 0 0>, /* I2S_0_SDO[1] */ |
| 61 | <&gpz 5 2 0 0>, /* I2S_0_SDO[2] */ |
| 62 | <&gpz 6 2 0 0>; /* I2S_0_SDO[3] */ |
| 63 | }; |