| * I2C |
| |
| Required properties : |
| |
| - reg : Offset and length of the register set for the device |
| - compatible : should be "fsl,CHIP-i2c" where CHIP is the name of a |
| compatible processor, e.g. mpc8313, mpc8543, mpc8544, mpc5121, |
| mpc5200 or mpc5200b. For the mpc5121, an additional node |
| "fsl,mpc5121-i2c-ctrl" is required as shown in the example below. |
| |
| Recommended properties : |
| |
| - interrupts : <a b> where a is the interrupt number and b is a |
| field that represents an encoding of the sense and level |
| information for the interrupt. This should be encoded based on |
| the information in section 2) depending on the type of interrupt |
| controller you have. |
| - interrupt-parent : the phandle for the interrupt controller that |
| services interrupts for this device. |
| - fsl,preserve-clocking : boolean; if defined, the clock settings |
| from the bootloader are preserved (not touched). |
| - clock-frequency : desired I2C bus clock frequency in Hz. |
| - fsl,timeout : I2C bus timeout in microseconds. |
| |
| Examples : |
| |
| /* MPC5121 based board */ |
| i2c@1740 { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| compatible = "fsl,mpc5121-i2c", "fsl-i2c"; |
| reg = <0x1740 0x20>; |
| interrupts = <11 0x8>; |
| interrupt-parent = <&ipic>; |
| clock-frequency = <100000>; |
| }; |
| |
| i2ccontrol@1760 { |
| compatible = "fsl,mpc5121-i2c-ctrl"; |
| reg = <0x1760 0x8>; |
| }; |
| |
| /* MPC5200B based board */ |
| i2c@3d00 { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c"; |
| reg = <0x3d00 0x40>; |
| interrupts = <2 15 0>; |
| interrupt-parent = <&mpc5200_pic>; |
| fsl,preserve-clocking; |
| }; |
| |
| /* MPC8544 base board */ |
| i2c@3100 { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| compatible = "fsl,mpc8544-i2c", "fsl-i2c"; |
| reg = <0x3100 0x100>; |
| interrupts = <43 2>; |
| interrupt-parent = <&mpic>; |
| clock-frequency = <400000>; |
| fsl,timeout = <10000>; |
| }; |