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# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
%YAML 1.2
---
$id: "http://devicetree.org/schemas/i2c/apple,i2c.yaml#"
$schema: "http://devicetree.org/meta-schemas/core.yaml#"
title: Apple/PASemi I2C controller
maintainers:
- Sven Peter <sven@svenpeter.dev>
description: |
Apple SoCs such as the M1 come with a I2C controller based on the one found
in machines with P. A. Semi's PWRficient processors.
The bus is used to communicate with e.g. USB PD chips or the speaker
amp.
allOf:
- $ref: /schemas/i2c/i2c-controller.yaml#
properties:
compatible:
items:
- const: apple,t8103-i2c
- const: apple,i2c
reg:
maxItems: 1
clocks:
items:
- description: I2C bus reference clock
interrupts:
maxItems: 1
clock-frequency:
description: |
Desired I2C bus clock frequency in Hz. If not specified, 100 kHz will be
used. This frequency is generated by dividing the reference clock.
Allowed values are between ref_clk/(16*4) and ref_clk/(16*255).
required:
- compatible
- reg
- clocks
- interrupts
unevaluatedProperties: false
examples:
- |
i2c@35010000 {
compatible = "apple,t8103-i2c", "apple,i2c";
reg = <0x35010000 0x4000>;
interrupt-parent = <&aic>;
interrupts = <0 627 4>;
clocks = <&ref_clk>;
#address-cells = <1>;
#size-cells = <0>;
};
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