xref: /linux/Documentation/devicetree/bindings/i2c/aspeed,i2c.yaml (revision c7546e2c3cb739a3c1a2f5acaf9bb629d401afe5) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/i2c/aspeed,i2c.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs
8
9maintainers:
10  - Rayn Chen <rayn_chen@aspeedtech.com>
11
12allOf:
13  - $ref: /schemas/i2c/i2c-controller.yaml#
14
15properties:
16  compatible:
17    enum:
18      - aspeed,ast2400-i2c-bus
19      - aspeed,ast2500-i2c-bus
20      - aspeed,ast2600-i2c-bus
21
22  reg:
23    minItems: 1
24    items:
25      - description: address offset and range of bus
26      - description: address offset and range of bus buffer
27
28  interrupts:
29    maxItems: 1
30
31  clocks:
32    maxItems: 1
33    description:
34      root clock of bus, should reference the APB
35      clock in the second cell
36
37  resets:
38    maxItems: 1
39
40  bus-frequency:
41    minimum: 500
42    maximum: 4000000
43    default: 100000
44    description: frequency of the bus clock in Hz defaults to 100 kHz when not
45      specified
46
47required:
48  - reg
49  - compatible
50  - clocks
51  - resets
52
53unevaluatedProperties: false
54
55examples:
56  - |
57    #include <dt-bindings/clock/aspeed-clock.h>
58    i2c@40 {
59      #address-cells = <1>;
60      #size-cells = <0>;
61      compatible = "aspeed,ast2500-i2c-bus";
62      reg = <0x40 0x40>;
63      clocks = <&syscon ASPEED_CLK_APB>;
64      resets = <&syscon ASPEED_RESET_I2C>;
65      bus-frequency = <100000>;
66      interrupts = <0>;
67      interrupt-parent = <&i2c_ic>;
68    };
69