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