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
7 title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs
8
9 maintainers:
10 - Rayn Chen <rayn_chen@aspeedtech.com>
11
12 allOf:
13 - $ref: /schemas/i2c/i2c-controller.yaml#
14
15 properties:
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
47 required:
48 - reg
49 - compatible
50 - clocks
51 - resets
52
53 unevaluatedProperties: false
54
55 examples:
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 };
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