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|
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/maxim,max7360.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Maxim MAX7360 Keypad, Rotary encoder, PWM and GPIO controller
maintainers:
- Kamel Bouhara <kamel.bouhara@bootlin.com>
- Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
description: |
Maxim MAX7360 device, with following functions:
- keypad controller
- rotary controller
- GPIO and GPO controller
- PWM controller
https://www.analog.com/en/products/max7360.html
allOf:
- $ref: /schemas/input/matrix-keymap.yaml#
- $ref: /schemas/input/input.yaml#
properties:
compatible:
enum:
- maxim,max7360
reg:
maxItems: 1
interrupts:
maxItems: 2
interrupt-names:
items:
- const: inti
- const: intk
keypad-debounce-delay-ms:
description: Keypad debounce delay in ms
minimum: 9
maximum: 40
default: 9
rotary-debounce-delay-ms:
description: Rotary encoder debounce delay in ms
minimum: 0
maximum: 15
default: 0
linux,axis:
$ref: /schemas/input/rotary-encoder.yaml#/properties/linux,axis
rotary-encoder,relative-axis:
$ref: /schemas/types.yaml#/definitions/flag
description:
Register a relative axis rather than an absolute one.
rotary-encoder,steps:
$ref: /schemas/types.yaml#/definitions/uint32
default: 24
description:
Number of steps in a full turnaround of the
encoder. Only relevant for absolute axis. Defaults to 24 which is a
typical value for such devices.
rotary-encoder,rollover:
$ref: /schemas/types.yaml#/definitions/flag
description:
Automatic rollover when the rotary value becomes
greater than the specified steps or smaller than 0. For absolute axis only.
"#pwm-cells":
const: 3
gpio:
$ref: /schemas/gpio/maxim,max7360-gpio.yaml#
description:
PORT0 to PORT7 general purpose input/output pins configuration.
gpo:
$ref: /schemas/gpio/maxim,max7360-gpio.yaml#
description: >
COL2 to COL7 general purpose output pins configuration. Allows to use
unused keypad columns as outputs.
The MAX7360 has 8 column lines and 6 of them can be used as GPOs. GPIOs
numbers used for this gpio-controller node do correspond to the column
numbers: values 0 and 1 are never valid, values from 2 to 7 might be valid
depending on the value of the keypad,num-column property.
patternProperties:
'-pins$':
type: object
description:
Pinctrl node's client devices use subnodes for desired pin configuration.
Client device subnodes use below standard properties.
$ref: /schemas/pinctrl/pincfg-node.yaml
properties:
pins:
description:
List of gpio pins affected by the properties specified in this
subnode.
items:
pattern: '^(PORT[0-7]|ROTARY)$'
minItems: 1
maxItems: 8
function:
description:
Specify the alternative function to be configured for the specified
pins.
enum: [gpio, pwm, rotary]
additionalProperties: false
required:
- compatible
- reg
- interrupts
- interrupt-names
- linux,keymap
- linux,axis
- "#pwm-cells"
- gpio
- gpo
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/input/input.h>
#include <dt-bindings/interrupt-controller/arm-gic.h>
i2c {
#address-cells = <1>;
#size-cells = <0>;
io-expander@38 {
compatible = "maxim,max7360";
reg = <0x38>;
interrupt-parent = <&gpio1>;
interrupts = <23 IRQ_TYPE_LEVEL_LOW>,
<24 IRQ_TYPE_LEVEL_LOW>;
interrupt-names = "inti", "intk";
keypad,num-rows = <8>;
keypad,num-columns = <4>;
linux,keymap = <
MATRIX_KEY(0x00, 0x00, KEY_F5)
MATRIX_KEY(0x01, 0x00, KEY_F4)
MATRIX_KEY(0x02, 0x01, KEY_F6)
>;
keypad-debounce-delay-ms = <10>;
autorepeat;
rotary-debounce-delay-ms = <2>;
linux,axis = <0>; /* REL_X */
rotary-encoder,relative-axis;
#pwm-cells = <3>;
max7360_gpio: gpio {
compatible = "maxim,max7360-gpio";
gpio-controller;
#gpio-cells = <2>;
maxim,constant-current-disable = <0x06>;
interrupt-controller;
#interrupt-cells = <0x2>;
};
max7360_gpo: gpo {
compatible = "maxim,max7360-gpo";
gpio-controller;
#gpio-cells = <2>;
};
backlight_pins: backlight-pins {
pins = "PORT2";
function = "pwm";
};
};
};
|
