i2c-imx.txt

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    1 * Freescale Inter IC (I2C) and High Speed Inter IC (HS-I2C) for i.MX
    2 
    3 Required properties:
    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
    8 - reg : Should contain I2C/HS-I2C registers location and length
    9 - interrupts : Should contain I2C/HS-I2C interrupt
   10 - clocks : Should contain the I2C/HS-I2C clock specifier
   11 
   12 Optional properties:
   13 - clock-frequency : Constains desired I2C/HS-I2C bus clock frequency in Hz.
   14   The absence of the property indicates the default frequency 100 kHz.
   15 - dmas: A list of two dma specifiers, one for each entry in dma-names.
   16 - dma-names: should contain "tx" and "rx".
   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
   21 
   22 Examples:
   23 
   24 i2c@83fc4000 { /* I2C2 on i.MX51 */
   25         compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
   26         reg = <0x83fc4000 0x4000>;
   27         interrupts = <63>;
   28 };
   29 
   30 i2c@70038000 { /* HS-I2C on i.MX51 */
   31         compatible = "fsl,imx51-i2c", "fsl,imx21-i2c";
   32         reg = <0x70038000 0x4000>;
   33         interrupts = <64>;
   34         clock-frequency = <400000>;
   35 };
   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";
   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>;
   49 };

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sys/contrib/device-tree/Bindings/i2c/i2c-imx.txt