mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
1.7 KiB
62 lines
1.7 KiB
* 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. |
|
- 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>; |
|
};
|
|
|