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1* I2C2 3The I2C controller is expressed as a bus under the CPM node.4 5Properties:6- compatible : "fsl,cpm1-i2c", "fsl,cpm2-i2c"7- reg : On CPM2 devices, the second resource doesn't specify the I2C8 Parameter RAM itself, but the I2C_BASE field of the CPM2 Parameter RAM9 (typically 0x8afc 0x2).10- #address-cells : Should be one. The cell is the i2c device address with11 the r/w bit set to zero.12- #size-cells : Should be zero.13- clock-frequency : Can be used to set the i2c clock frequency. If14 unspecified, a default frequency of 60kHz is being used.15The following two properties are deprecated. They are only used by legacy16i2c drivers to find the bus to probe:17- linux,i2c-index : Can be used to hard code an i2c bus number. By default,18 the bus number is dynamically assigned by the i2c core.19- linux,i2c-class : Can be used to override the i2c class. The class is used20 by legacy i2c device drivers to find a bus in a specific context like21 system management, video or sound. By default, I2C_CLASS_HWMON (1) is22 being used. The definition of the classes can be found in23 include/i2c/i2c.h24 25Example, based on mpc823:26 27 i2c@860 {28 compatible = "fsl,mpc823-i2c",29 "fsl,cpm1-i2c";30 reg = <0x860 0x20 0x3c80 0x30>;31 interrupts = <16>;32 interrupt-parent = <&CPM_PIC>;33 fsl,cpm-command = <0x10>;34 #address-cells = <1>;35 #size-cells = <0>;36 37 rtc@68 {38 compatible = "dallas,ds1307";39 reg = <0x68>;40 };41 };42