/Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/cpm/i2c.txt
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- * I2C
- The I2C controller is expressed as a bus under the CPM node.
- Properties:
- - compatible : "fsl,cpm1-i2c", "fsl,cpm2-i2c"
- - reg : On CPM2 devices, the second resource doesn't specify the I2C
- Parameter RAM itself, but the I2C_BASE field of the CPM2 Parameter RAM
- (typically 0x8afc 0x2).
- - #address-cells : Should be one. The cell is the i2c device address with
- the r/w bit set to zero.
- - #size-cells : Should be zero.
- - clock-frequency : Can be used to set the i2c clock frequency. If
- unspecified, a default frequency of 60kHz is being used.
- The following two properties are deprecated. They are only used by legacy
- i2c drivers to find the bus to probe:
- - linux,i2c-index : Can be used to hard code an i2c bus number. By default,
- the bus number is dynamically assigned by the i2c core.
- - linux,i2c-class : Can be used to override the i2c class. The class is used
- by legacy i2c device drivers to find a bus in a specific context like
- system management, video or sound. By default, I2C_CLASS_HWMON (1) is
- being used. The definition of the classes can be found in
- include/i2c/i2c.h
- Example, based on mpc823:
- i2c@860 {
- compatible = "fsl,mpc823-i2c",
- "fsl,cpm1-i2c";
- reg = <0x860 0x20 0x3c80 0x30>;
- interrupts = <16>;
- interrupt-parent = <&CPM_PIC>;
- fsl,cpm-command = <0x10>;
- #address-cells = <1>;
- #size-cells = <0>;
- rtc@68 {
- compatible = "dallas,ds1307";
- reg = <0x68>;
- };
- };