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# SPDX-License-Identifier: GPL-2.0-only
%YAML 1.2
---
$id: http://devicetree.org/schemas/input/hid-over-i2c.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: HID over I2C Devices
maintainers:
- Benjamin Tissoires <benjamin.tissoires@redhat.com>
- Jiri Kosina <jkosina@suse.cz>
description: |+
HID over I2C provides support for various Human Interface Devices over the
I2C bus. These devices can be for example touchpads, keyboards, touch screens
or sensors.
The specification has been written by Microsoft and is currently available here:
https://msdn.microsoft.com/en-us/library/windows/hardware/hh852380.aspx
If this binding is used, the kernel module i2c-hid will handle the communication
with the device and the generic hid core layer will handle the protocol.
allOf:
- $ref: /schemas/input/touchscreen/touchscreen.yaml#
properties:
compatible:
oneOf:
- items:
- enum:
- wacom,w9013
- const: hid-over-i2c
- description: Just "hid-over-i2c" alone is allowed, but not recommended.
const: hid-over-i2c
reg:
maxItems: 1
interrupts:
maxItems: 1
hid-descr-addr:
description: HID descriptor address
$ref: /schemas/types.yaml#/definitions/uint32
post-power-on-delay-ms:
description: Time required by the device after enabling its regulators
or powering it on, before it is ready for communication.
touchscreen-inverted-x: true
touchscreen-inverted-y: true
vdd-supply:
description: 3.3V supply
vddl-supply:
description: 1.8V supply
wakeup-source: true
required:
- compatible
- reg
- interrupts
additionalProperties: false
examples:
- |
i2c {
#address-cells = <1>;
#size-cells = <0>;
hid@2c {
compatible = "hid-over-i2c";
reg = <0x2c>;
hid-descr-addr = <0x0020>;
interrupts = <3 2>;
};
};
...
|
