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Message-ID: <20240814024513.164199-3-charles.goodix@gmail.com>
Date: Wed, 14 Aug 2024 10:45:13 +0800
From: Charles Wang <charles.goodix@...il.com>
To: dmitry.torokhov@...il.com,
dianders@...omium.org,
dan.carpenter@...aro.org,
conor@...nel.org,
robh@...nel.org
Cc: krzk+dt@...nel.org,
jikos@...nel.org,
bentiss@...nel.org,
hbarnor@...omium.org,
linux-input@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Charles Wang <charles.goodix@...il.com>,
Conor Dooley <conor.dooley@...rochip.com>
Subject: [PATCH v7 2/2] 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@...rochip.com>
Signed-off-by: Charles Wang <charles.goodix@...il.com>
---
.../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..a7d42a5d6
--- /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 <charles.goodix@...il.com>
+
+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
+
+ 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 <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/gpio/gpio.h>
+
+ spi {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ touchscreen@0 {
+ compatible = "goodix,gt7986u";
+ 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>;
+ };
+ };
+
+...
--
2.43.0
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