| # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) |
| # Copyright (C) STMicroelectronics 2019. |
| %YAML 1.2 |
| --- |
| $id: http://devicetree.org/schemas/pinctrl/st,stm32-pinctrl.yaml# |
| $schema: http://devicetree.org/meta-schemas/core.yaml# |
| |
| title: STM32 GPIO and Pin Mux/Config controller |
| |
| maintainers: |
| - Alexandre TORGUE <alexandre.torgue@st.com> |
| |
| description: | |
| STMicroelectronics's STM32 MCUs intregrate a GPIO and Pin mux/config hardware |
| controller. It controls the input/output settings on the available pins and |
| also provides ability to multiplex and configure the output of various |
| on-chip controllers onto these pads. |
| |
| properties: |
| compatible: |
| enum: |
| - st,stm32f429-pinctrl |
| - st,stm32f469-pinctrl |
| - st,stm32f746-pinctrl |
| - st,stm32f769-pinctrl |
| - st,stm32h743-pinctrl |
| - st,stm32mp157-pinctrl |
| - st,stm32mp157-z-pinctrl |
| |
| '#address-cells': |
| const: 1 |
| '#size-cells': |
| const: 1 |
| |
| ranges: true |
| pins-are-numbered: true |
| hwlocks: true |
| |
| interrupts: |
| maxItems: 1 |
| |
| st,syscfg: |
| description: Should be phandle/offset/mask |
| - Phandle to the syscon node which includes IRQ mux selection. |
| - The offset of the IRQ mux selection register. |
| - The field mask of IRQ mux, needed if different of 0xf. |
| $ref: "/schemas/types.yaml#/definitions/phandle-array" |
| |
| st,package: |
| description: |
| Indicates the SOC package used. |
| More details in include/dt-bindings/pinctrl/stm32-pinfunc.h |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| enum: [1, 2, 4, 8] |
| |
| patternProperties: |
| '^gpio@[0-9a-f]*$': |
| type: object |
| properties: |
| gpio-controller: true |
| '#gpio-cells': |
| const: 2 |
| |
| reg: |
| maxItems: 1 |
| clocks: |
| maxItems: 1 |
| reset: |
| minItems: 1 |
| maxItems: 1 |
| gpio-ranges: |
| minItems: 1 |
| maxItems: 16 |
| ngpios: |
| description: |
| Number of available gpios in a bank. |
| minimum: 1 |
| maximum: 16 |
| |
| st,bank-name: |
| description: |
| Should be a name string for this bank as specified in the datasheet. |
| $ref: "/schemas/types.yaml#/definitions/string" |
| enum: |
| - GPIOA |
| - GPIOB |
| - GPIOC |
| - GPIOD |
| - GPIOE |
| - GPIOF |
| - GPIOG |
| - GPIOH |
| - GPIOI |
| - GPIOJ |
| - GPIOK |
| - GPIOZ |
| |
| st,bank-ioport: |
| description: |
| Should correspond to the EXTI IOport selection (EXTI line used |
| to select GPIOs as interrupts). |
| $ref: "/schemas/types.yaml#/definitions/uint32" |
| minimum: 0 |
| maximum: 11 |
| |
| required: |
| - gpio-controller |
| - '#gpio-cells' |
| - reg |
| - clocks |
| - st,bank-name |
| |
| '-[0-9]*$': |
| type: object |
| patternProperties: |
| '^pins': |
| type: object |
| description: | |
| A pinctrl node should contain at least one subnode representing the |
| pinctrl group available on the machine. Each subnode will list the |
| pins it needs, and how they should be configured, with regard to muxer |
| configuration, pullups, drive, output high/low and output speed. |
| properties: |
| pinmux: |
| $ref: "/schemas/types.yaml#/definitions/uint32-array" |
| description: | |
| Integer array, represents gpio pin number and mux setting. |
| Supported pin number and mux varies for different SoCs, and are |
| defined in dt-bindings/pinctrl/<soc>-pinfunc.h directly. |
| These defines are calculated as: ((port * 16 + line) << 8) | function |
| With: |
| - port: The gpio port index (PA = 0, PB = 1, ..., PK = 11) |
| - line: The line offset within the port (PA0 = 0, PA1 = 1, ..., PA15 = 15) |
| - function: The function number, can be: |
| * 0 : GPIO |
| * 1 : Alternate Function 0 |
| * 2 : Alternate Function 1 |
| * 3 : Alternate Function 2 |
| * ... |
| * 16 : Alternate Function 15 |
| * 17 : Analog |
| To simplify the usage, macro is available to generate "pinmux" field. |
| This macro is available here: |
| - include/dt-bindings/pinctrl/stm32-pinfunc.h |
| Some examples of using macro: |
| /* GPIO A9 set as alernate function 2 */ |
| ... { |
| pinmux = <STM32_PINMUX('A', 9, AF2)>; |
| }; |
| /* GPIO A9 set as GPIO */ |
| ... { |
| pinmux = <STM32_PINMUX('A', 9, GPIO)>; |
| }; |
| /* GPIO A9 set as analog */ |
| ... { |
| pinmux = <STM32_PINMUX('A', 9, ANALOG)>; |
| }; |
| |
| bias-disable: |
| type: boolean |
| bias-pull-down: |
| type: boolean |
| bias-pull-up: |
| type: boolean |
| drive-push-pull: |
| type: boolean |
| drive-open-drain: |
| type: boolean |
| output-low: |
| type: boolean |
| output-high: |
| type: boolean |
| slew-rate: |
| description: | |
| 0: Low speed |
| 1: Medium speed |
| 2: Fast speed |
| 3: High speed |
| $ref: /schemas/types.yaml#/definitions/uint32 |
| enum: [0, 1, 2, 3] |
| |
| required: |
| - pinmux |
| |
| required: |
| - compatible |
| - '#address-cells' |
| - '#size-cells' |
| - ranges |
| - pins-are-numbered |
| |
| additionalProperties: false |
| |
| examples: |
| - | |
| #include <dt-bindings/pinctrl/stm32-pinfunc.h> |
| #include <dt-bindings/mfd/stm32f4-rcc.h> |
| //Example 1 |
| pinctrl@40020000 { |
| #address-cells = <1>; |
| #size-cells = <1>; |
| compatible = "st,stm32f429-pinctrl"; |
| ranges = <0 0x40020000 0x3000>; |
| pins-are-numbered; |
| |
| gpioa: gpio@0 { |
| gpio-controller; |
| #gpio-cells = <2>; |
| reg = <0x0 0x400>; |
| resets = <&reset_ahb1 0>; |
| clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOA)>; |
| st,bank-name = "GPIOA"; |
| }; |
| }; |
| |
| //Example 2 (using gpio-ranges) |
| pinctrl@50020000 { |
| #address-cells = <1>; |
| #size-cells = <1>; |
| compatible = "st,stm32f429-pinctrl"; |
| ranges = <0 0x50020000 0x3000>; |
| pins-are-numbered; |
| |
| gpiob: gpio@1000 { |
| gpio-controller; |
| #gpio-cells = <2>; |
| reg = <0x1000 0x400>; |
| resets = <&reset_ahb1 0>; |
| clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOB)>; |
| st,bank-name = "GPIOB"; |
| gpio-ranges = <&pinctrl 0 0 16>; |
| }; |
| |
| gpioc: gpio@2000 { |
| gpio-controller; |
| #gpio-cells = <2>; |
| reg = <0x2000 0x400>; |
| resets = <&reset_ahb1 0>; |
| clocks = <&rcc 0 STM32F4_AHB1_CLOCK(GPIOC)>; |
| st,bank-name = "GPIOC"; |
| ngpios = <5>; |
| gpio-ranges = <&pinctrl 0 16 3>, |
| <&pinctrl 14 30 2>; |
| }; |
| }; |
| |
| //Example 3 pin groups |
| pinctrl { |
| usart1_pins_a: usart1-0 { |
| pins1 { |
| pinmux = <STM32_PINMUX('A', 9, AF7)>; |
| bias-disable; |
| drive-push-pull; |
| slew-rate = <0>; |
| }; |
| pins2 { |
| pinmux = <STM32_PINMUX('A', 10, AF7)>; |
| bias-disable; |
| }; |
| }; |
| }; |
| |
| usart1 { |
| pinctrl-0 = <&usart1_pins_a>; |
| pinctrl-names = "default"; |
| }; |
| |
| ... |
