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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/i2c/aspeed,i2c.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ASPEED I2C on the AST24XX, AST25XX, and AST26XX SoCs Device Tree Bindings
maintainers:
- Rayn Chen <rayn_chen@aspeedtech.com>
allOf:
- $ref: /schemas/i2c/i2c-controller.yaml#
properties:
compatible:
enum:
- aspeed,ast2400-i2c-bus
- aspeed,ast2500-i2c-bus
- aspeed,ast2600-i2c-bus
reg:
minItems: 1
items:
- description: address offset and range of bus
- description: address offset and range of bus buffer
interrupts:
maxItems: 1
clocks:
maxItems: 1
description:
root clock of bus, should reference the APB
clock in the second cell
resets:
maxItems: 1
bus-frequency:
minimum: 500
maximum: 4000000
default: 100000
description: frequency of the bus clock in Hz defaults to 100 kHz when not
specified
multi-master:
type: boolean
description:
states that there is another master active on this bus
required:
- reg
- compatible
- clocks
- resets
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/clock/aspeed-clock.h>
i2c0: i2c-bus@40 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "aspeed,ast2500-i2c-bus";
reg = <0x40 0x40>;
clocks = <&syscon ASPEED_CLK_APB>;
resets = <&syscon ASPEED_RESET_I2C>;
bus-frequency = <100000>;
interrupts = <0>;
interrupt-parent = <&i2c_ic>;
};
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