1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) 2%YAML 1.2 3--- 4$id: "http://devicetree.org/schemas/i2c/apple,i2c.yaml#" 5$schema: "http://devicetree.org/meta-schemas/core.yaml#" 6 7title: Apple/PASemi I2C controller 8 9maintainers: 10 - Sven Peter <sven@svenpeter.dev> 11 12description: | 13 Apple SoCs such as the M1 come with a I2C controller based on the one found 14 in machines with P. A. Semi's PWRficient processors. 15 The bus is used to communicate with e.g. USB PD chips or the speaker 16 amp. 17 18allOf: 19 - $ref: /schemas/i2c/i2c-controller.yaml# 20 21properties: 22 compatible: 23 items: 24 - const: apple,t8103-i2c 25 - const: apple,i2c 26 27 reg: 28 maxItems: 1 29 30 clocks: 31 items: 32 - description: I2C bus reference clock 33 34 interrupts: 35 maxItems: 1 36 37 clock-frequency: 38 description: | 39 Desired I2C bus clock frequency in Hz. If not specified, 100 kHz will be 40 used. This frequency is generated by dividing the reference clock. 41 Allowed values are between ref_clk/(16*4) and ref_clk/(16*255). 42 43 power-domains: 44 maxItems: 1 45 46required: 47 - compatible 48 - reg 49 - clocks 50 - interrupts 51 52unevaluatedProperties: false 53 54examples: 55 - | 56 i2c@35010000 { 57 compatible = "apple,t8103-i2c", "apple,i2c"; 58 reg = <0x35010000 0x4000>; 59 interrupt-parent = <&aic>; 60 interrupts = <0 627 4>; 61 clocks = <&ref_clk>; 62 #address-cells = <1>; 63 #size-cells = <0>; 64 }; 65