xref: /linux/Documentation/devicetree/bindings/i2c/i2c-mpc.yaml (revision 34f7c6e7d4396090692a09789db231e12cb4762b) 
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    description: |
47      I2C bus timeout in microseconds
48
49  fsl,i2c-erratum-a004447:
50    $ref: /schemas/types.yaml#/definitions/flag
51    description: |
52      Indicates the presence of QorIQ erratum A-004447, which
53      says that the standard i2c recovery scheme mechanism does
54      not work and an alternate implementation is needed.
55
56required:
57  - compatible
58  - reg
59  - interrupts
60
61unevaluatedProperties: false
62
63examples:
64  - |
65    /* MPC5121 based board */
66    i2c@1740 {
67        #address-cells = <1>;
68        #size-cells = <0>;
69        compatible = "fsl,mpc5121-i2c", "fsl-i2c";
70        reg = <0x1740 0x20>;
71        interrupts = <11 0x8>;
72        interrupt-parent = <&ipic>;
73        clock-frequency = <100000>;
74    };
75
76  - |
77    /* MPC5200B based board */
78    i2c@3d00 {
79        #address-cells = <1>;
80        #size-cells = <0>;
81        compatible = "fsl,mpc5200b-i2c", "fsl,mpc5200-i2c", "fsl-i2c";
82        reg = <0x3d00 0x40>;
83        interrupts = <2 15 0>;
84        interrupt-parent = <&mpc5200_pic>;
85        fsl,preserve-clocking;
86    };
87
88  - |
89    /* MPC8544 base board */
90    i2c@3100 {
91        #address-cells = <1>;
92        #size-cells = <0>;
93        compatible = "fsl,mpc8544-i2c", "fsl-i2c";
94        reg = <0x3100 0x100>;
95        interrupts = <43 2>;
96        interrupt-parent = <&mpic>;
97        clock-frequency = <400000>;
98        fsl,timeout = <10000>;
99    };
100...
101