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|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/pinctrl/awinic,aw9523-pinctrl.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Awinic AW9523/AW9523B I2C GPIO Expander
maintainers:
- AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
description: |
The Awinic AW9523/AW9523B I2C GPIO Expander featuring 16 multi-function
I/O, 256 steps PWM mode and interrupt support.
properties:
compatible:
const: awinic,aw9523-pinctrl
reg:
maxItems: 1
'#gpio-cells':
description: |
Specifying the pin number and flags, as defined in
include/dt-bindings/gpio/gpio.h
const: 2
gpio-controller: true
gpio-ranges:
maxItems: 1
interrupt-controller: true
interrupts:
maxItems: 1
description: Specifies the INTN pin IRQ.
'#interrupt-cells':
description:
Specifies the PIN numbers and Flags, as defined in defined in
include/dt-bindings/interrupt-controller/irq.h
const: 2
reset-gpios:
maxItems: 1
# PIN CONFIGURATION NODES
patternProperties:
'-pins$':
type: object
description:
Pinctrl node's client devices use subnodes for desired pin configuration.
Client device subnodes use below standard properties.
$ref: /schemas/pinctrl/pincfg-node.yaml
properties:
pins:
description:
List of gpio pins affected by the properties specified in
this subnode.
items:
pattern: "^gpio([0-9]|1[0-5])$"
minItems: 1
maxItems: 16
function:
description:
Specify the alternative function to be configured for the
specified pins.
enum: [ gpio, pwm ]
bias-disable: true
bias-pull-down: true
bias-pull-up: true
drive-open-drain: true
drive-push-pull: true
input-enable: true
input-disable: true
output-high: true
output-low: true
required:
- pins
- function
additionalProperties: false
required:
- compatible
- reg
- gpio-controller
- '#gpio-cells'
- gpio-ranges
additionalProperties: false
examples:
# Example configuration to drive pins for a keyboard matrix
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
aw9523: gpio-expander@58 {
compatible = "awinic,aw9523-pinctrl";
reg = <0x58>;
interrupt-parent = <&tlmm>;
interrupts = <50 IRQ_TYPE_EDGE_FALLING>;
gpio-controller;
#gpio-cells = <2>;
gpio-ranges = <&tlmm 0 0 16>;
interrupt-controller;
#interrupt-cells = <2>;
reset-gpios = <&tlmm 51 GPIO_ACTIVE_HIGH>;
keyboard-matrix-col-pins {
pins = "gpio8", "gpio9", "gpio10", "gpio11",
"gpio12", "gpio13", "gpio14", "gpio15";
function = "gpio";
input-disable;
output-low;
};
keyboard-matrix-row-pins {
pins = "gpio0", "gpio1", "gpio2", "gpio3",
"gpio4", "gpio5", "gpio6", "gpio7";
function = "gpio";
bias-pull-up;
drive-open-drain;
input-enable;
};
};
};
|
