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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/bindings/pinctrl/intel,lgm-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Intel Lightning Mountain SoC pinmux & GPIO controller binding
maintainers:
- Rahul Tanwar <rahul.tanwar@linux.intel.com>
description: |
Pinmux & GPIO controller controls pin multiplexing & configuration including
GPIO function selection & GPIO attributes configuration.
Please refer to [1] for details of the common pinctrl bindings used by the
client devices.
[1] Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
properties:
compatible:
const: intel,lgm-io
reg:
maxItems: 1
# Client device subnode's properties
patternProperties:
'-pins$':
type: object
description:
Pinctrl node's client devices use subnodes for desired pin configuration.
Client device subnodes use below standard properties.
properties:
function:
$ref: /schemas/types.yaml#/definitions/string
description:
A string containing the name of the function to mux to the group.
groups:
$ref: /schemas/types.yaml#/definitions/string-array
description:
An array of strings identifying the list of groups.
pins:
$ref: /schemas/types.yaml#/definitions/uint32-array
description:
List of pins to select with this function.
pinmux:
description: The applicable mux group.
allOf:
- $ref: "/schemas/types.yaml#/definitions/uint32-array"
bias-pull-up:
type: boolean
bias-pull-down:
type: boolean
drive-strength:
description: |
Selects the drive strength for the specified pins in mA.
0: 2 mA
1: 4 mA
2: 8 mA
3: 12 mA
allOf:
- $ref: /schemas/types.yaml#/definitions/uint32
- enum: [0, 1, 2, 3]
slew-rate:
type: boolean
description: |
Sets slew rate for specified pins.
0: slow slew
1: fast slew
drive-open-drain:
type: boolean
output-enable:
type: boolean
required:
- function
- groups
additionalProperties: false
required:
- compatible
- reg
additionalProperties: false
examples:
# Pinmux controller node
- |
pinctrl: pinctrl@e2880000 {
compatible = "intel,lgm-pinctrl";
reg = <0xe2880000 0x100000>;
uart0-pins {
pins = <64>, /* UART_RX0 */
<65>; /* UART_TX0 */
function = "CONSOLE_UART0";
pinmux = <1>,
<1>;
groups = "CONSOLE_UART0";
};
};
...
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