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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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68ea8c8779
SG2042 introduces a simple pinctrl device for all configurable pins. For the SG2042 pinctl register file, each register (32 bits) is responsible for two pins, each occupying the upper 16 bits and lower 16 bits of the register. It supports setting pull up/down, drive strength and input schmitt trigger. Add support for SG2042 pinctrl device. Signed-off-by: Inochi Amaoto <inochiama@gmail.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://lore.kernel.org/20250211051801.470800-6-inochiama@gmail.com Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
130 lines
3.2 KiB
YAML
130 lines
3.2 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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$id: http://devicetree.org/schemas/pinctrl/sophgo,sg2042-pinctrl.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Sophgo SG2042 Pin Controller
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maintainers:
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- Inochi Amaoto <inochiama@outlook.com>
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properties:
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compatible:
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enum:
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- sophgo,sg2042-pinctrl
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- sophgo,sg2044-pinctrl
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reg:
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maxItems: 1
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patternProperties:
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'-cfg$':
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type: object
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description:
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A pinctrl node should contain at least one subnode representing the
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pinctrl groups available on the machine.
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additionalProperties: false
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patternProperties:
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'-pins$':
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type: object
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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 enable, drive strength
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output enable/disable state. For configuration detail,
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refer to https://github.com/sophgo/sophgo-doc/.
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allOf:
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- $ref: pincfg-node.yaml#
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- $ref: pinmux-node.yaml#
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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 the
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node apply to. This should be set using the PINMUX macro.
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bias-disable: true
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bias-pull-up:
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type: boolean
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bias-pull-down:
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type: boolean
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drive-strength-microamp:
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description: typical current when output low level.
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input-schmitt-enable: true
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input-schmitt-disable: true
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required:
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- pinmux
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additionalProperties: false
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required:
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- compatible
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- reg
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allOf:
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- if:
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properties:
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compatible:
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contains:
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const: sophgo,sg2042-pinctrl
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then:
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patternProperties:
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'-cfg$':
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patternProperties:
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'-pins$':
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properties:
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drive-strength-microamp:
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enum: [ 5400, 8100, 10700, 13400,
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16100, 18800, 21400, 24100,
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26800, 29400, 32100, 34800,
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37400, 40100, 42800, 45400 ]
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- if:
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properties:
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compatible:
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contains:
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const: sophgo,sg2044-pinctrl
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then:
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patternProperties:
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'-cfg$':
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patternProperties:
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'-pins$':
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properties:
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drive-strength-microamp:
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enum: [ 3200, 6400, 9600, 12700,
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15900, 19100, 22200, 25300,
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29500, 32700, 35900, 39000,
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42000, 45200, 48300, 51400]
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/pinctrl/pinctrl-sg2042.h>
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pinctrl@30011000 {
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compatible = "sophgo,sg2042-pinctrl";
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reg = <30011000 0x1000>;
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uart0_cfg: uart0-cfg {
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uart0-pins {
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pinmux = <PINMUX(PIN_UART0_TX, 0)>,
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<PINMUX(PIN_UART0_RX, 0)>;
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bias-pull-up;
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drive-strength-microamp = <13400>;
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};
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};
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};
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...
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