128 lines
3.4 KiB
YAML
128 lines
3.4 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/pinctrl/canaan,k230-pinctrl.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Canaan Kendryte K230 Pin Controller
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maintainers:
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- Ze Huang <18771902331@163.com>
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description:
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The Canaan Kendryte K230 platform includes 64 IO pins, each capable of
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multiplexing up to 5 different functions. Pin function configuration is
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performed on a per-pin basis.
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properties:
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compatible:
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const: canaan,k230-pinctrl
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reg:
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maxItems: 1
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patternProperties:
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'-pins$':
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type: object
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additionalProperties: false
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description:
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A pinctrl node should contain at least one subnode representing the
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pinctrl groups available on the machine.
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patternProperties:
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'-cfg$':
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type: object
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allOf:
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- $ref: /schemas/pinctrl/pincfg-node.yaml
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- $ref: /schemas/pinctrl/pinmux-node.yaml
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additionalProperties: false
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description:
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Each subnode will list the pins it needs, and how they should
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be configured, with regard to muxer configuration, bias, input
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enable/disable, input schmitt trigger, slew-rate enable/disable,
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slew-rate, drive strength.
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properties:
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pinmux:
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description:
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The list of GPIOs and their mux settings that properties in
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the node apply to. This should be set with the macro
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'K230_PINMUX(pin, mode)'
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bias-disable: true
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bias-pull-up: true
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bias-pull-down: true
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drive-strength:
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minimum: 0
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maximum: 15
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input-enable: true
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output-enable: true
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input-schmitt-enable: true
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slew-rate:
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description: |
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slew rate control enable
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0: disable
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1: enable
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enum: [0, 1]
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power-source:
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description: |
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Specifies the power source voltage for the IO bank that the
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pin belongs to. Each bank of IO pins operate at a specific,
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fixed voltage levels. Incorrect voltage configuration can
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damage the chip. The defined constants represent the
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possible voltage configurations:
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- K230_MSC_3V3 (value 0): 3.3V power supply
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- K230_MSC_1V8 (value 1): 1.8V power supply
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The following banks have the corresponding voltage
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configurations:
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- bank IO0 to IO1: Fixed at 1.8V
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- bank IO2 to IO13: Fixed at 1.8V
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- bank IO14 to IO25: Fixed at 1.8V
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- bank IO26 to IO37: Fixed at 1.8V
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- bank IO38 to IO49: Fixed at 1.8V
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- bank IO50 to IO61: Fixed at 3.3V
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- bank IO62 to IO63: Fixed at 1.8V
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enum: [0, 1]
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required:
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- pinmux
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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pinctrl@91105000 {
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compatible = "canaan,k230-pinctrl";
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reg = <0x91105000 0x100>;
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uart2-pins {
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uart2-pins-cfg {
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pinmux = <0x503>, /* uart2 txd */
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<0x603>; /* uart2 rxd */
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slew-rate = <0>;
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drive-strength = <4>;
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power-source = <1>;
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input-enable;
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output-enable;
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bias-disable;
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};
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};
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};
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