projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| dfcd04b1 SG |
1 | * Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX |
| 2 | ||
| 3 | Required properties: | |
| e66ff0a9 JL |
4 | - compatible : |
| 5 | - "fsl,imx1-i2c" for I2C compatible with the one integrated on i.MX1 SoC | |
| 6 | - "fsl,imx21-i2c" for I2C compatible with the one integrated on i.MX21 SoC | |
| 7 | - "fsl,vf610-i2c" for I2C compatible with the one integrated on Vybrid vf610 SoC | |
| dfcd04b1 SG |
8 | - reg : Should contain I2C/HS-I2C registers location and length |
| 9 | - interrupts : Should contain I2C/HS-I2C interrupt | |
| 5d232112 | 10 | - clocks : Should contain the I2C/HS-I2C clock specifier |
| dfcd04b1 SG |
11 | |
| 12 | Optional properties: | |
| 13 | - clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz. | |
| 14 | The absence of the propoerty indicates the default frequency 100 kHz. | |
| ce1a7884 YY |
15 | - dmas: A list of two dma specifiers, one for each entry in dma-names. |
| 16 | - dma-names: should contain "tx" and "rx". | |
| 1c4b6c3b GP |
17 | - scl-gpios: specify the gpio related to SCL pin |
| 18 | - sda-gpios: specify the gpio related to SDA pin | |
| 19 | - pinctrl: add extra pinctrl to configure i2c pins to gpio function for i2c | |
| 20 | bus recovery, call it "gpio" state | |
| dfcd04b1 SG |
21 | |
| 22 | Examples: | |
| 23 | ||
| 24 | i2c@83fc4000 { /* I2C2 on i.MX51 */ | |
| 5bdfba29 | 25 | compatible = "fsl,imx51-i2c", "fsl,imx21-i2c"; |
| dfcd04b1 SG |
26 | reg = <0x83fc4000 0x4000>; |
| 27 | interrupts = <63>; | |
| 28 | }; | |
| 29 | ||
| 30 | i2c@70038000 { /* HS-I2C on i.MX51 */ | |
| 5bdfba29 | 31 | compatible = "fsl,imx51-i2c", "fsl,imx21-i2c"; |
| dfcd04b1 SG |
32 | reg = <0x70038000 0x4000>; |
| 33 | interrupts = <64>; | |
| 34 | clock-frequency = <400000>; | |
| 35 | }; | |
| ce1a7884 YY |
36 | |
| 37 | i2c0: i2c@40066000 { /* i2c0 on vf610 */ | |
| 38 | compatible = "fsl,vf610-i2c"; | |
| 39 | reg = <0x40066000 0x1000>; | |
| 40 | interrupts =<0 71 0x04>; | |
| 41 | dmas = <&edma0 0 50>, | |
| 42 | <&edma0 0 51>; | |
| 43 | dma-names = "rx","tx"; | |
| 1c4b6c3b GP |
44 | pinctrl-names = "default", "gpio"; |
| 45 | pinctrl-0 = <&pinctrl_i2c1>; | |
| 46 | pinctrl-1 = <&pinctrl_i2c1_gpio>; | |
| 47 | scl-gpios = <&gpio5 26 GPIO_ACTIVE_HIGH>; | |
| 48 | sda-gpios = <&gpio5 27 GPIO_ACTIVE_HIGH>; | |
| ce1a7884 | 49 | }; |