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[45.117.96.243]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-724079a403fsm3579656b3a.105.2024.11.08.04.03.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Nov 2024 04:03:29 -0800 (PST) From: Charles Wang To: krzk@kernel.org, hbarnor@chromium.org, dianders@chromium.org, conor.dooley@microchip.com Cc: dmitry.torokhov@gmail.com, jikos@kernel.org, bentiss@kernel.org, linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Charles Wang Subject: [PATCH v3 1/2] dt-bindings: input: Goodix GT7986U SPI HID Touchscreen Date: Fri, 8 Nov 2024 20:03:10 +0800 Message-ID: <20241108120311.87795-2-charles.goodix@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241108120311.87795-1-charles.goodix@gmail.com> References: <20241108120311.87795-1-charles.goodix@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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. NOTE: these bindings are distinct from the bindings used with the GT7986U when the chip is running I2C firmware. For some background, see discussion on the mailing lists in the thread: https://lore.kernel.org/r/20241018020815.3098263-2-charles.goodix@gmail.com Signed-off-by: Charles Wang --- .../bindings/input/goodix,gt7986u-spifw.yaml | 75 +++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 Documentation/devicetree/bindings/input/goodix,gt7986u-= spifw.yaml diff --git a/Documentation/devicetree/bindings/input/goodix,gt7986u-spifw.y= aml b/Documentation/devicetree/bindings/input/goodix,gt7986u-spifw.yaml new file mode 100644 index 000000000..8105b9ce2 --- /dev/null +++ b/Documentation/devicetree/bindings/input/goodix,gt7986u-spifw.yaml @@ -0,0 +1,75 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/input/goodix,gt7986u-spifw.yaml# +$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 + over the SPI bus, but it is incompatible with Microsoft's HID-over-SPI p= rotocol. + + NOTE: these bindings are distinct from the bindings used with the + GT7986U when the chip is running I2C firmware. This is because there's + not a single device that talks over both I2C and SPI but rather + distinct touchscreens that happen to be built with the same ASIC but + that are distinct products running distinct firmware. + +allOf: + - $ref: /schemas/spi/spi-peripheral-props.yaml# + +properties: + compatible: + enum: + - goodix,gt7986u-spifw + + 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. + + spi-max-frequency: true + +required: + - compatible + - reg + - interrupts + - reset-gpios + - goodix,hid-report-addr + +unevaluatedProperties: false + +examples: + - | + #include + #include + + spi { + #address-cells =3D <1>; + #size-cells =3D <0>; + + touchscreen@0 { + compatible =3D "goodix,gt7986u-spifw"; + reg =3D <0>; + interrupt-parent =3D <&gpio>; + interrupts =3D <25 IRQ_TYPE_LEVEL_LOW>; + reset-gpios =3D <&gpio1 1 GPIO_ACTIVE_LOW>; + spi-max-frequency =3D <10000000>; + goodix,hid-report-addr =3D <0x22c8c>; + }; + }; + +... --=20 2.43.0 From nobody Sat Nov 23 23:45:10 2024 Received: from mail-pf1-f176.google.com (mail-pf1-f176.google.com [209.85.210.176]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B7AA1E570A; Fri, 8 Nov 2024 12:03:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.176 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731067416; cv=none; b=nDZfLoxgXVBvfvErt4XPJ/a5p0Th1jOIHLM+Qfw9soolfrrvieqjrQIsvELPlj3iFQbDqvG2MES2VLX0Ghr6QKa1WYCfBhANkNK5Gr+JnKFHmu7PMPpZ6WgWYibzgPZy/Uwl99ygXyf5QoSqw0x5tkekyWloGHyydAe8TXaQjqE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731067416; c=relaxed/simple; bh=ChBYcsymTV1V2mzS78DD/EMvOHeZnX/SWf2LKR2jUG0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; 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[45.117.96.243]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-724079a403fsm3579656b3a.105.2024.11.08.04.03.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 08 Nov 2024 04:03:33 -0800 (PST) From: Charles Wang To: krzk@kernel.org, hbarnor@chromium.org, dianders@chromium.org, conor.dooley@microchip.com Cc: dmitry.torokhov@gmail.com, jikos@kernel.org, bentiss@kernel.org, linux-input@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Charles Wang Subject: [PATCH v3 2/2] dt-bindings: input: gt7986u-spifw: Remove hid-report-addr property Date: Fri, 8 Nov 2024 20:03:11 +0800 Message-ID: <20241108120311.87795-3-charles.goodix@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241108120311.87795-1-charles.goodix@gmail.com> References: <20241108120311.87795-1-charles.goodix@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Since all boards use the same address, drop the goodix,hid-report-addr property and hardcode it in the driver as a default value. Signed-off-by: Charles Wang --- .../devicetree/bindings/input/goodix,gt7986u-spifw.yaml | 7 ------- 1 file changed, 7 deletions(-) diff --git a/Documentation/devicetree/bindings/input/goodix,gt7986u-spifw.y= aml b/Documentation/devicetree/bindings/input/goodix,gt7986u-spifw.yaml index 8105b9ce2..c9e346a60 100644 --- a/Documentation/devicetree/bindings/input/goodix,gt7986u-spifw.yaml +++ b/Documentation/devicetree/bindings/input/goodix,gt7986u-spifw.yaml @@ -36,11 +36,6 @@ properties: reset-gpios: maxItems: 1 =20 - goodix,hid-report-addr: - $ref: /schemas/types.yaml#/definitions/uint32 - description: - The register address for retrieving HID report data. - spi-max-frequency: true =20 required: @@ -48,7 +43,6 @@ required: - reg - interrupts - reset-gpios - - goodix,hid-report-addr =20 unevaluatedProperties: false =20 @@ -68,7 +62,6 @@ examples: interrupts =3D <25 IRQ_TYPE_LEVEL_LOW>; reset-gpios =3D <&gpio1 1 GPIO_ACTIVE_LOW>; spi-max-frequency =3D <10000000>; - goodix,hid-report-addr =3D <0x22c8c>; }; }; =20 --=20 2.43.0