# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) %YAML 1.2 --- $id: http://devicetree.org/schemas/i2c/st,stm32-i2c.yaml# $schema: http://devicetree.org/meta-schemas/core.yaml# title: I2C controller embedded in STMicroelectronics STM32 I2C platform maintainers: - Pierre-Yves MORDRET allOf: - $ref: /schemas/i2c/i2c-controller.yaml# - if: properties: compatible: contains: enum: - st,stm32f7-i2c - st,stm32mp13-i2c - st,stm32mp15-i2c - st,stm32mp25-i2c then: properties: i2c-scl-rising-time-ns: default: 25 i2c-scl-falling-time-ns: default: 10 else: properties: st,syscfg-fmp: false - if: properties: compatible: contains: enum: - st,stm32f4-i2c then: properties: clock-frequency: enum: [100000, 400000] - if: properties: compatible: contains: enum: - st,stm32f4-i2c - st,stm32f7-i2c - st,stm32mp13-i2c - st,stm32mp15-i2c then: properties: interrupts: minItems: 2 interrupt-names: minItems: 2 else: properties: interrupts: maxItems: 1 interrupt-names: maxItems: 1 properties: compatible: enum: - st,stm32f4-i2c - st,stm32f7-i2c - st,stm32mp13-i2c - st,stm32mp15-i2c - st,stm32mp25-i2c reg: maxItems: 1 interrupts: items: - description: interrupt ID for I2C event - description: interrupt ID for I2C error minItems: 1 interrupt-names: items: - const: event - const: error minItems: 1 resets: maxItems: 1 clocks: maxItems: 1 dmas: items: - description: RX DMA Channel phandle - description: TX DMA Channel phandle dma-names: items: - const: rx - const: tx clock-frequency: description: Desired I2C bus clock frequency in Hz. If not specified, the default 100 kHz frequency will be used. For STM32F7, STM32H7 and STM32MP1 SoCs, if timing parameters match, the bus clock frequency can be from 1Hz to 1MHz. default: 100000 minimum: 1 maximum: 1000000 st,syscfg-fmp: description: Use to set Fast Mode Plus bit within SYSCFG when Fast Mode Plus speed is selected by slave. $ref: /schemas/types.yaml#/definitions/phandle-array items: - items: - description: phandle to syscfg - description: register offset within syscfg - description: register bitmask for FMP bit wakeup-source: true required: - compatible - reg - interrupts - resets - clocks unevaluatedProperties: false examples: - | #include #include //Example 1 (with st,stm32f4-i2c compatible) i2c@40005400 { compatible = "st,stm32f4-i2c"; #address-cells = <1>; #size-cells = <0>; reg = <0x40005400 0x400>; interrupts = <31>, <32>; resets = <&rcc 277>; clocks = <&rcc 0 149>; }; - | #include #include //Example 2 (with st,stm32f7-i2c compatible) i2c@40005800 { compatible = "st,stm32f7-i2c"; #address-cells = <1>; #size-cells = <0>; reg = <0x40005800 0x400>; interrupts = <31>, <32>; resets = <&rcc STM32F7_APB1_RESET(I2C1)>; clocks = <&rcc 1 CLK_I2C1>; }; - | #include #include //Example 3 (with st,stm32mp15-i2c compatible on stm32mp) #include #include #include i2c@40013000 { compatible = "st,stm32mp15-i2c"; #address-cells = <1>; #size-cells = <0>; reg = <0x40013000 0x400>; interrupts = , ; clocks = <&rcc I2C2_K>; resets = <&rcc I2C2_R>; i2c-scl-rising-time-ns = <185>; i2c-scl-falling-time-ns = <20>; st,syscfg-fmp = <&syscfg 0x4 0x2>; };