dt-bindings: input: Goodix SPI HID Touchscreen
The Goodix GT7986U touch controller report touch data according to the HID protocol through the SPI bus. However, it is incompatible with Microsoft's HID-over-SPI protocol. Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Charles Wang <charles.goodix@gmail.com> Signed-off-by: Jiri Kosina <jkosina@suse.com>
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Documentation/devicetree/bindings/input/goodix,gt7986u.yaml
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Documentation/devicetree/bindings/input/goodix,gt7986u.yaml
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/input/goodix,gt7986u.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: GOODIX GT7986U SPI HID Touchscreen
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maintainers:
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- Charles Wang <charles.goodix@gmail.com>
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description: Supports the Goodix GT7986U touchscreen.
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This touch controller reports data packaged according to the HID protocol,
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but is incompatible with Microsoft's HID-over-SPI protocol.
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allOf:
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- $ref: /schemas/spi/spi-peripheral-props.yaml#
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properties:
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compatible:
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enum:
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- goodix,gt7986u
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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reset-gpios:
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maxItems: 1
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goodix,hid-report-addr:
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$ref: /schemas/types.yaml#/definitions/uint32
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description:
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The register address for retrieving HID report data.
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This address is related to the device firmware and may
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change after a firmware update.
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spi-max-frequency: true
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additionalProperties: false
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required:
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- compatible
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- reg
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- interrupts
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- reset-gpios
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- goodix,hid-report-addr
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examples:
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- |
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#include <dt-bindings/interrupt-controller/irq.h>
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#include <dt-bindings/gpio/gpio.h>
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spi {
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#address-cells = <1>;
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#size-cells = <0>;
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touchscreen@0 {
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compatible = "goodix,gt7986u";
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reg = <0>;
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interrupt-parent = <&gpio>;
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interrupts = <25 IRQ_TYPE_LEVEL_LOW>;
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reset-gpios = <&gpio1 1 GPIO_ACTIVE_LOW>;
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spi-max-frequency = <10000000>;
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goodix,hid-report-addr = <0x22c8c>;
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};
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};
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...
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