/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/i2c.txt

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  1. * I2C
  2. The I2C controller is expressed as a bus under the CPM node.
  3. Properties:
  4. - compatible : "fsl,cpm1-i2c", "fsl,cpm2-i2c"
  5. - reg : On CPM2 devices, the second resource doesn't specify the I2C
  6. Parameter RAM itself, but the I2C_BASE field of the CPM2 Parameter RAM
  7. (typically 0x8afc 0x2).
  8. - #address-cells : Should be one. The cell is the i2c device address with
  9. the r/w bit set to zero.
  10. - #size-cells : Should be zero.
  11. - clock-frequency : Can be used to set the i2c clock frequency. If
  12. unspecified, a default frequency of 60kHz is being used.
  13. The following two properties are deprecated. They are only used by legacy
  14. i2c drivers to find the bus to probe:
  15. - linux,i2c-index : Can be used to hard code an i2c bus number. By default,
  16. the bus number is dynamically assigned by the i2c core.
  17. - linux,i2c-class : Can be used to override the i2c class. The class is used
  18. by legacy i2c device drivers to find a bus in a specific context like
  19. system management, video or sound. By default, I2C_CLASS_HWMON (1) is
  20. being used. The definition of the classes can be found in
  21. include/i2c/i2c.h
  22. Example, based on mpc823:
  23. i2c@860 {
  24. compatible = "fsl,mpc823-i2c",
  25. "fsl,cpm1-i2c";
  26. reg = <0x860 0x20 0x3c80 0x30>;
  27. interrupts = <16>;
  28. interrupt-parent = <&CPM_PIC>;
  29. fsl,cpm-command = <0x10>;
  30. #address-cells = <1>;
  31. #size-cells = <0>;
  32. rtc@68 {
  33. compatible = "dallas,ds1307";
  34. reg = <0x68>;
  35. };
  36. };