| * Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX |
| |
| Required properties: |
| - compatible : |
| - "fsl,imx1-i2c" for I2C compatible with the one integrated on i.MX1 SoC |
| - "fsl,imx21-i2c" for I2C compatible with the one integrated on i.MX21 SoC |
| - "fsl,vf610-i2c" for I2C compatible with the one integrated on Vybrid vf610 SoC |
| - reg : Should contain I2C/HS-I2C registers location and length |
| - interrupts : Should contain I2C/HS-I2C interrupt |
| - clocks : Should contain the I2C/HS-I2C clock specifier |
| |
| Optional properties: |
| - clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz. |
| The absence of the propoerty indicates the default frequency 100 kHz. |
| - dmas: A list of two dma specifiers, one for each entry in dma-names. |
| - dma-names: should contain "tx" and "rx". |
| - scl-gpios: specify the gpio related to SCL pin |
| - sda-gpios: specify the gpio related to SDA pin |
| - pinctrl: add extra pinctrl to configure i2c pins to gpio function for i2c |
| bus recovery, call it "gpio" state |
| |
| Examples: |
| |
| i2c@83fc4000 { /* I2C2 on i.MX51 */ |
| compatible = "fsl,imx51-i2c", "fsl,imx21-i2c"; |
| reg = <0x83fc4000 0x4000>; |
| interrupts = <63>; |
| }; |
| |
| i2c@70038000 { /* HS-I2C on i.MX51 */ |
| compatible = "fsl,imx51-i2c", "fsl,imx21-i2c"; |
| reg = <0x70038000 0x4000>; |
| interrupts = <64>; |
| clock-frequency = <400000>; |
| }; |
| |
| i2c0: i2c@40066000 { /* i2c0 on vf610 */ |
| compatible = "fsl,vf610-i2c"; |
| reg = <0x40066000 0x1000>; |
| interrupts =<0 71 0x04>; |
| dmas = <&edma0 0 50>, |
| <&edma0 0 51>; |
| dma-names = "rx","tx"; |
| pinctrl-names = "default", "gpio"; |
| pinctrl-0 = <&pinctrl_i2c1>; |
| pinctrl-1 = <&pinctrl_i2c1_gpio>; |
| scl-gpios = <&gpio5 26 GPIO_ACTIVE_HIGH>; |
| sda-gpios = <&gpio5 27 GPIO_ACTIVE_HIGH>; |
| }; |
