91 lines
2.6 KiB
YAML
91 lines
2.6 KiB
YAML
# Copyright (c) 2023-2024 Analog Devices, Inc.
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# SPDX-License-Identifier: Apache-2.0
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description: |
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MAX32 Pin controller Node
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Based on pincfg-node.yaml binding.
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Note: `bias-disable` are default pin configurations.
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compatible: "adi,max32-pinctrl"
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include: base.yaml
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properties:
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reg:
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required: true
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child-binding:
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description: |
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Base binding configuration for ADI MAX32xxx MCUs
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include:
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- name: pincfg-node.yaml
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property-allowlist:
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- bias-disable
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- bias-pull-down
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- bias-pull-up
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- output-low
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- output-high
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- input-enable
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- output-enable
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- power-source
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- drive-strength
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properties:
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pinmux:
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required: true
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type: int
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description: |
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Integer array, represents gpio pin number and mux setting.
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These defines are calculated as: (pin<<8 | port<<4 | function<<0)
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With:
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- port: The gpio port index (0, 1, ...)
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- pin: The pin offset within the port (0, 1, 2, ...)
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- function: The function number, can be:
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* 0 : GPIO
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* 1 : Alternate Function 1
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* 2 : Alternate Function 2
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* 3 : Alternate Function 3
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* 4 : Alternate Function 4
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In case selected pin function is GPIO, pin is statically configured as
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a plain input/output GPIO. Default configuration is input. Output value
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can be configured by adding 'ouptut-low' or 'output-high' properties
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to the pin configuration.
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To simplify the usage, macro is available to generate "pinmux" field.
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This macro is available here:
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-include/zephyr/dt-bindings/pinctrl/max32-pinctrl.h
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Some examples of macro usage:
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P0.9 set as alernate function 1
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{
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pinmux = <MAX32_PINMUX(0, 9, AF1)>;
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};
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P0.9 set as alernate function 2
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{
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pinmux = <MAX32_PINMUX(0, 9, AF2)>;
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};
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P0.9 set as GPIO output high
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{
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pinmux = <MAX32_PINMUX(0, 9, GPIO)>;
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output-high;
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};
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power-source:
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enum: [0, 1]
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description: |
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GPIO Supply Voltage Select, Selects the voltage rail used for the pin.
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0 or MAX32_VSEL_VDDIO
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1 or MAX32_VSEL_VDDIOH
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drive-strength:
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default: 0
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enum: [0, 1, 2, 3]
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description: |
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There are 4 drive strength mode.
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Mode 0: 1mA
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Mode 1: 2mA
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Mode 2: 4mA
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Mode 3: 8mA
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Default GPIO output drive strength is mode 0 for MAX32 MCUs.
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For more information please take a look device user guide, datasheet.
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