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(mailgw01.gttektw.com. [45.117.96.243]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a9b1f028e1asm61877166b.55.2024.10.25.04.47.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 25 Oct 2024 04:47:16 -0700 (PDT) From: Charles Wang To: dianders@chromium.org, dmitry.torokhov@gmail.com, hbarnor@chromium.org, conor.dooley@microchip.com Cc: krzk@kernel.org, jikos@kernel.org, bentiss@kernel.org, linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Charles Wang Subject: [PATCH] dt-bindings: input: Goodix SPI HID Touchscreen Date: Fri, 25 Oct 2024 19:46:43 +0800 Message-ID: <20241025114642.40793-2-charles.goodix@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-input@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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. Signed-off-by: Charles Wang --- .../bindings/input/goodix,gt7986u.yaml | 71 +++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/goodix,gt7986u.yaml diff --git a/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml b/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml new file mode 100644 index 000000000..849117639 --- /dev/null +++ b/Documentation/devicetree/bindings/input/goodix,gt7986u.yaml @@ -0,0 +1,71 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/goodix,gt7986u.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: GOODIX GT7986U SPI HID Touchscreen + +maintainers: + - Charles Wang + +description: Supports the Goodix GT7986U touchscreen. + This touch controller reports data packaged according to the HID protocol, + but is incompatible with Microsoft's HID-over-SPI protocol. + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + enum: + - goodix,gt7986u-spi + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + reset-gpios: + maxItems: 1 + + goodix,hid-report-addr: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + The register address for retrieving HID report data. + This address is related to the device firmware and may + change after a firmware update. + + spi-max-frequency: true + +additionalProperties: false + +required: + - compatible + - reg + - interrupts + - reset-gpios + - goodix,hid-report-addr + +examples: + - | + #include + #include + + spi { + #address-cells = <1>; + #size-cells = <0>; + + touchscreen@0 { + compatible = "goodix,gt7986u-spi"; + reg = <0>; + interrupt-parent = <&gpio>; + interrupts = <25 IRQ_TYPE_LEVEL_LOW>; + reset-gpios = <&gpio1 1 GPIO_ACTIVE_LOW>; + spi-max-frequency = <10000000>; + goodix,hid-report-addr = <0x22c8c>; + }; + }; + +...