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- U-Boot I2C
- ----------
- U-Boot's I2C model has the concept of an offset within a chip (I2C target
- device). The offset can be up to 4 bytes long, but is normally 1 byte,
- meaning that offsets from 0 to 255 are supported by the chip. This often
- corresponds to register numbers.
- Apart from the controller-specific I2C bindings, U-Boot supports a special
- property which allows the chip offset length to be selected.
- Optional properties:
- - u-boot,i2c-offset-len - length of chip offset in bytes. If omitted the
- default value of 1 is used.
- Example
- -------
- i2c4: i2c@12ca0000 {
- cros-ec@1e {
- reg = <0x1e>;
- compatible = "google,cros-ec";
- i2c-max-frequency = <100000>;
- u-boot,i2c-offset-len = <0>;
- ec-interrupt = <&gpx1 6 GPIO_ACTIVE_LOW>;
- };
- };
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