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|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/ultrarisc,dp1000-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: UltraRISC DP1000 Pin Controller
maintainers:
- Jia Wang <wangjia@ultrarisc.com>
description: |
UltraRISC RISC-V SoC DP1000 pin controller.
The controller manages ports A, B, C, D and LPC. Ports A-D default to
GPIO and provide additional SPI, UART, I2C, and PWM mux functions.
LPC pins default to the LPC interface and can be muxed to eSPI.
All pins also support pin configuration, including drive strength,
pull-up, and pull-down settings.
properties:
compatible:
const: ultrarisc,dp1000-pinctrl
reg:
items:
- description: pin controller registers
required:
- compatible
- reg
patternProperties:
'.*-pins$':
type: object
unevaluatedProperties: false
allOf:
- $ref: /schemas/pinctrl/pincfg-node.yaml#
- $ref: /schemas/pinctrl/pinmux-node.yaml#
- if:
properties:
pins:
items:
minimum: 40
maximum: 52
then:
properties:
function:
enum:
- lpc
- espi
else:
properties:
pins:
items:
maximum: 39
function:
enum:
- gpio
- i2c
- pwm
- spi
- uart
properties:
pins:
description: |
List of pins affected by this state node, using numeric pin IDs.
Pins 0-39 correspond to ports A-D, and pins 40-52 correspond
to LPC0-LPC12.
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 1
uniqueItems: true
items:
minimum: 0
maximum: 52
function:
description: |
Mux function to select for the listed pins. Supported functions
depend on the selected pins and match the DP1000 hardware mux
table.
enum:
- gpio
- i2c
- pwm
- spi
- uart
- lpc
- espi
bias-disable: true
bias-high-impedance: true
bias-pull-up: true
bias-pull-down: true
drive-strength:
description: Output drive strength in mA.
enum: [20, 27, 33, 40]
required:
- pins
- function
unevaluatedProperties: false
examples:
- |
soc {
#address-cells = <2>;
#size-cells = <2>;
pinctrl@11081000 {
compatible = "ultrarisc,dp1000-pinctrl";
reg = <0x0 0x11081000 0x0 0x1000>;
i2c0-pins {
pins = <12 13>;
function = "i2c";
bias-pull-up;
drive-strength = <33>;
};
uart0-pins {
pins = <8 9>;
function = "uart";
bias-pull-up;
drive-strength = <33>;
};
};
};
|
