1*0883c2c0SZhao Qiang* I2C 2*0883c2c0SZhao Qiang 3*0883c2c0SZhao QiangThe I2C controller is expressed as a bus under the CPM node. 4*0883c2c0SZhao Qiang 5*0883c2c0SZhao QiangProperties: 6*0883c2c0SZhao Qiang- compatible : "fsl,cpm1-i2c", "fsl,cpm2-i2c" 7*0883c2c0SZhao Qiang- reg : On CPM2 devices, the second resource doesn't specify the I2C 8*0883c2c0SZhao Qiang Parameter RAM itself, but the I2C_BASE field of the CPM2 Parameter RAM 9*0883c2c0SZhao Qiang (typically 0x8afc 0x2). 10*0883c2c0SZhao Qiang- #address-cells : Should be one. The cell is the i2c device address with 11*0883c2c0SZhao Qiang the r/w bit set to zero. 12*0883c2c0SZhao Qiang- #size-cells : Should be zero. 13*0883c2c0SZhao Qiang- clock-frequency : Can be used to set the i2c clock frequency. If 14*0883c2c0SZhao Qiang unspecified, a default frequency of 60kHz is being used. 15*0883c2c0SZhao QiangThe following two properties are deprecated. They are only used by legacy 16*0883c2c0SZhao Qiangi2c drivers to find the bus to probe: 17*0883c2c0SZhao Qiang- linux,i2c-index : Can be used to hard code an i2c bus number. By default, 18*0883c2c0SZhao Qiang the bus number is dynamically assigned by the i2c core. 19*0883c2c0SZhao Qiang- linux,i2c-class : Can be used to override the i2c class. The class is used 20*0883c2c0SZhao Qiang by legacy i2c device drivers to find a bus in a specific context like 21*0883c2c0SZhao Qiang system management, video or sound. By default, I2C_CLASS_HWMON (1) is 22*0883c2c0SZhao Qiang being used. The definition of the classes can be found in 23*0883c2c0SZhao Qiang include/i2c/i2c.h 24*0883c2c0SZhao Qiang 25*0883c2c0SZhao QiangExample, based on mpc823: 26*0883c2c0SZhao Qiang 27*0883c2c0SZhao Qiang i2c@860 { 28*0883c2c0SZhao Qiang compatible = "fsl,mpc823-i2c", 29*0883c2c0SZhao Qiang "fsl,cpm1-i2c"; 30*0883c2c0SZhao Qiang reg = <0x860 0x20 0x3c80 0x30>; 31*0883c2c0SZhao Qiang interrupts = <16>; 32*0883c2c0SZhao Qiang interrupt-parent = <&CPM_PIC>; 33*0883c2c0SZhao Qiang fsl,cpm-command = <0x10>; 34*0883c2c0SZhao Qiang #address-cells = <1>; 35*0883c2c0SZhao Qiang #size-cells = <0>; 36*0883c2c0SZhao Qiang 37*0883c2c0SZhao Qiang rtc@68 { 38*0883c2c0SZhao Qiang compatible = "dallas,ds1307"; 39*0883c2c0SZhao Qiang reg = <0x68>; 40*0883c2c0SZhao Qiang }; 41*0883c2c0SZhao Qiang }; 42