| * 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>; |
| }; |
| }; |
