131 lines
3.0 KiB
YAML
131 lines
3.0 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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$id: http://devicetree.org/schemas/pinctrl/ultrarisc,dp1000-pinctrl.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: UltraRISC DP1000 Pin Controller
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maintainers:
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- Jia Wang <wangjia@ultrarisc.com>
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description: |
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UltraRISC RISC-V SoC DP1000 pin controller.
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The controller manages ports A, B, C, D and LPC. Ports A-D default to
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GPIO and provide additional SPI, UART, I2C, and PWM mux functions.
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LPC pins default to the LPC interface and can be muxed to eSPI.
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All pins also support pin configuration, including drive strength,
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pull-up, and pull-down settings.
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properties:
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compatible:
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const: ultrarisc,dp1000-pinctrl
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reg:
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items:
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- description: pin controller registers
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required:
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- compatible
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- reg
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patternProperties:
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'.*-pins$':
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type: object
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unevaluatedProperties: false
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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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- if:
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properties:
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pins:
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items:
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minimum: 40
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maximum: 52
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then:
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properties:
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function:
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enum:
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- lpc
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- espi
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else:
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properties:
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pins:
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items:
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maximum: 39
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function:
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enum:
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- gpio
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- i2c
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- pwm
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- spi
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- uart
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properties:
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pins:
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description: |
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List of pins affected by this state node, using numeric pin IDs.
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Pins 0-39 correspond to ports A-D, and pins 40-52 correspond
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to LPC0-LPC12.
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$ref: /schemas/types.yaml#/definitions/uint32-array
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minItems: 1
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uniqueItems: true
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items:
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minimum: 0
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maximum: 52
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function:
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description: |
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Mux function to select for the listed pins. Supported functions
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depend on the selected pins and match the DP1000 hardware mux
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table.
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enum:
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- gpio
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- i2c
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- pwm
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- spi
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- uart
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- lpc
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- espi
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bias-disable: true
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bias-high-impedance: 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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description: Output drive strength in mA.
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enum: [20, 27, 33, 40]
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required:
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- pins
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- function
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unevaluatedProperties: false
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examples:
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- |
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soc {
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#address-cells = <2>;
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#size-cells = <2>;
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pinctrl@11081000 {
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compatible = "ultrarisc,dp1000-pinctrl";
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reg = <0x0 0x11081000 0x0 0x1000>;
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i2c0-pins {
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pins = <12 13>;
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function = "i2c";
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bias-pull-up;
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drive-strength = <33>;
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};
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uart0-pins {
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pins = <8 9>;
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function = "uart";
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bias-pull-up;
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drive-strength = <33>;
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};
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};
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};
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