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Diffstat (limited to 'Documentation/devicetree/bindings/i2c/fsl-i2c.txt')
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diff --git a/Documentation/devicetree/bindings/i2c/fsl-i2c.txt b/Documentation/devicetree/bindings/i2c/fsl-i2c.txt new file mode 100644 index 000000000000..1eacd6b20ed5 --- /dev/null +++ b/Documentation/devicetree/bindings/i2c/fsl-i2c.txt | |||
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1 | * I2C | ||
2 | |||
3 | Required properties : | ||
4 | |||
5 | - reg : Offset and length of the register set for the device | ||
6 | - compatible : should be "fsl,CHIP-i2c" where CHIP is the name of a | ||
7 | compatible processor, e.g. mpc8313, mpc8543, mpc8544, mpc5121, | ||
8 | mpc5200 or mpc5200b. For the mpc5121, an additional node | ||
9 | "fsl,mpc5121-i2c-ctrl" is required as shown in the example below. | ||
10 | |||
11 | Recommended properties : | ||
12 | |||
13 | - interrupts : <a b> where a is the interrupt number and b is a | ||
14 | field that represents an encoding of the sense and level | ||
15 | information for the interrupt. This should be encoded based on | ||
16 | the information in section 2) depending on the type of interrupt | ||
17 | controller you have. | ||
18 | - interrupt-parent : the phandle for the interrupt controller that | ||
19 | services interrupts for this device. | ||
20 | - fsl,preserve-clocking : boolean; if defined, the clock settings | ||
21 | from the bootloader are preserved (not touched). | ||
22 | - clock-frequency : desired I2C bus clock frequency in Hz. | ||
23 | - fsl,timeout : I2C bus timeout in microseconds. | ||
24 | |||
25 | Examples : | ||
26 | |||
27 | /* MPC5121 based board */ | ||
28 | i2c@1740 { | ||
29 | #address-cells = <1>; | ||
30 | #size-cells = <0>; | ||
31 | compatible = "fsl,mpc5121-i2c", "fsl-i2c"; | ||
32 | reg = <0x1740 0x20>; | ||
33 | interrupts = <11 0x8>; | ||
34 | interrupt-parent = <&ipic>; | ||
35 | clock-frequency = <100000>; | ||
36 | }; | ||
37 | |||
38 | i2ccontrol@1760 { | ||
39 | compatible = "fsl,mpc5121-i2c-ctrl"; | ||
40 | reg = <0x1760 0x8>; | ||
41 | }; | ||
42 | |||
43 | /* MPC5200B based board */ | ||
44 | i2c@3d00 { | ||
45 | #address-cells = <1>; | ||
46 | #size-cells = <0>; | ||
47 | compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c"; | ||
48 | reg = <0x3d00 0x40>; | ||
49 | interrupts = <2 15 0>; | ||
50 | interrupt-parent = <&mpc5200_pic>; | ||
51 | fsl,preserve-clocking; | ||
52 | }; | ||
53 | |||
54 | /* MPC8544 base board */ | ||
55 | i2c@3100 { | ||
56 | #address-cells = <1>; | ||
57 | #size-cells = <0>; | ||
58 | compatible = "fsl,mpc8544-i2c", "fsl-i2c"; | ||
59 | reg = <0x3100 0x100>; | ||
60 | interrupts = <43 2>; | ||
61 | interrupt-parent = <&mpic>; | ||
62 | clock-frequency = <400000>; | ||
63 | fsl,timeout = <10000>; | ||
64 | }; | ||