projects / mirror_ubuntu-artful-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 7679c0e1 GL |
1 | I2C for R-Car platforms |
| 2 | ||
| 3 | Required properties: | |
| ad4a8dc3 SH |
4 | - compatible: |
| 5 | "renesas,i2c-r8a7778" if the device is a part of a R8A7778 SoC. | |
| 6 | "renesas,i2c-r8a7779" if the device is a part of a R8A7779 SoC. | |
| 7 | "renesas,i2c-r8a7790" if the device is a part of a R8A7790 SoC. | |
| 8 | "renesas,i2c-r8a7791" if the device is a part of a R8A7791 SoC. | |
| 9 | "renesas,i2c-r8a7792" if the device is a part of a R8A7792 SoC. | |
| 10 | "renesas,i2c-r8a7793" if the device is a part of a R8A7793 SoC. | |
| 11 | "renesas,i2c-r8a7794" if the device is a part of a R8A7794 SoC. | |
| 12 | "renesas,i2c-r8a7795" if the device is a part of a R8A7795 SoC. | |
| 13 | "renesas,i2c-r8a7796" if the device is a part of a R8A7796 SoC. | |
| 14 | "renesas,rcar-gen1-i2c" for a generic R-Car Gen1 compatible device. | |
| 15 | "renesas,rcar-gen2-i2c" for a generic R-Car Gen2 compatible device. | |
| 16 | "renesas,rcar-gen3-i2c" for a generic R-Car Gen3 compatible device. | |
| 17 | "renesas,i2c-rcar" (deprecated) | |
| 18 | ||
| 19 | When compatible with the generic version, nodes must list the | |
| 20 | SoC-specific version corresponding to the platform first followed | |
| 21 | by the generic version. | |
| 22 | ||
| 7679c0e1 GL |
23 | - reg: physical base address of the controller and length of memory mapped |
| 24 | region. | |
| 25 | - interrupts: interrupt specifier. | |
| 26 | ||
| 27 | Optional properties: | |
| 28 | - clock-frequency: desired I2C bus clock frequency in Hz. The absence of this | |
| ddf3dc82 | 29 | property indicates the default frequency 100 kHz. |
| e8936455 | 30 | - clocks: clock specifier. |
| 73e8b052 NS |
31 | - dmas: Must contain a list of two references to DMA specifiers, one for |
| 32 | transmission, and one for reception. | |
| 33 | - dma-names: Must contain a list of two DMA names, "tx" and "rx". | |
| 7679c0e1 | 34 | |
| ca68eade WS |
35 | - i2c-scl-falling-time-ns: see i2c.txt |
| 36 | - i2c-scl-internal-delay-ns: see i2c.txt | |
| 37 | - i2c-scl-rising-time-ns: see i2c.txt | |
| 38 | ||
| 7679c0e1 GL |
39 | Examples : |
| 40 | ||
| e8936455 WS |
41 | i2c0: i2c@e6508000 { |
| 42 | #address-cells = <1>; | |
| 43 | #size-cells = <0>; | |
| ad4a8dc3 | 44 | compatible = "renesas,i2c-r8a7791", "renesas,rcar-gen2-i2c"; |
| e8936455 WS |
45 | reg = <0 0xe6508000 0 0x40>; |
| 46 | interrupts = <0 287 IRQ_TYPE_LEVEL_HIGH>; | |
| 47 | clocks = <&mstp9_clks R8A7791_CLK_I2C0>; | |
| 48 | clock-frequency = <400000>; | |
| 7679c0e1 | 49 | }; |