xref: /linux/Documentation/devicetree/bindings/i2c/i2c-mpc.yaml (revision be239684b18e1cdcafcf8c7face4a2f562c745ad) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/i2c/i2c-mpc.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: I2C-Bus adapter for MPC824x/83xx/85xx/86xx/512x/52xx SoCs
8
9maintainers:
10  - Chris Packham <chris.packham@alliedtelesis.co.nz>
11
12allOf:
13  - $ref: /schemas/i2c/i2c-controller.yaml#
14
15properties:
16  compatible:
17    oneOf:
18      - items:
19          - enum:
20              - mpc5200-i2c
21              - fsl,mpc5200-i2c
22              - fsl,mpc5121-i2c
23              - fsl,mpc8313-i2c
24              - fsl,mpc8543-i2c
25              - fsl,mpc8544-i2c
26          - const: fsl-i2c
27      - items:
28          - const: fsl,mpc5200b-i2c
29          - const: fsl,mpc5200-i2c
30          - const: fsl-i2c
31
32  reg:
33    maxItems: 1
34
35  interrupts:
36    maxItems: 1
37
38  fsl,preserve-clocking:
39    $ref: /schemas/types.yaml#/definitions/flag
40    description: |
41      if defined, the clock settings from the bootloader are
42      preserved (not touched)
43
44  fsl,timeout:
45    $ref: /schemas/types.yaml#/definitions/uint32
46    deprecated: true
47    description: |
48      I2C bus timeout in microseconds
49
50  fsl,i2c-erratum-a004447:
51    $ref: /schemas/types.yaml#/definitions/flag
52    description: |
53      Indicates the presence of QorIQ erratum A-004447, which
54      says that the standard i2c recovery scheme mechanism does
55      not work and an alternate implementation is needed.
56
57required:
58  - compatible
59  - reg
60  - interrupts
61
62unevaluatedProperties: false
63
64examples:
65  - |
66    /* MPC5121 based board */
67    i2c@1740 {
68        #address-cells = <1>;
69        #size-cells = <0>;
70        compatible = "fsl,mpc5121-i2c", "fsl-i2c";
71        reg = <0x1740 0x20>;
72        interrupts = <11 0x8>;
73        interrupt-parent = <&ipic>;
74        clock-frequency = <100000>;
75    };
76
77  - |
78    /* MPC5200B based board */
79    i2c@3d00 {
80        #address-cells = <1>;
81        #size-cells = <0>;
82        compatible = "fsl,mpc5200b-i2c", "fsl,mpc5200-i2c", "fsl-i2c";
83        reg = <0x3d00 0x40>;
84        interrupts = <2 15 0>;
85        interrupt-parent = <&mpc5200_pic>;
86        fsl,preserve-clocking;
87    };
88
89  - |
90    /* MPC8544 base board */
91    i2c@3100 {
92        #address-cells = <1>;
93        #size-cells = <0>;
94        compatible = "fsl,mpc8544-i2c", "fsl-i2c";
95        reg = <0x3100 0x100>;
96        interrupts = <43 2>;
97        interrupt-parent = <&mpic>;
98        clock-frequency = <400000>;
99        i2c-scl-clk-low-timeout-us = <10000>;
100    };
101...
102