linux-kernel - [PATCH RFC 1/3] dt-bindings: input: document Goodix GTX8 Touchscreen ICs

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Message-Id: <20250918-gtx8-v1-1-cba879c84775@mainlining.org>
Date: Thu, 18 Sep 2025 16:02:48 +0200
From: Jens Reidel <adrian@...nlining.org>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Hans de Goede <hansg@...nel.org>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 Henrik Rydberg <rydberg@...math.org>
Cc: linux-input@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux@...nlining.org, 
 phone-devel@...r.kernel.org, ~postmarketos/upstreaming@...ts.sr.ht, 
 Jens Reidel <adrian@...nlining.org>
Subject: [PATCH RFC 1/3] dt-bindings: input: document Goodix GTX8
 Touchscreen ICs

Document the Goodix GT9886 and GT9896 which are part of the GTX8 series
of Touchscreen controller ICs from Goodix.

Signed-off-by: Jens Reidel <adrian@...nlining.org>
---
 .../bindings/input/touchscreen/goodix,gt9886.yaml  | 71 ++++++++++++++++++++++
 1 file changed, 71 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/goodix,gt9886.yaml b/Documentation/devicetree/bindings/input/touchscreen/goodix,gt9886.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..b1635032c81105836775d3c9b17977c25b1921e4
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/goodix,gt9886.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/goodix,gt9886.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Goodix GTX8 series touchscreen controller
+
+maintainers:
+  - Jens Reidel <adrian@...nlining.org>
+
+allOf:
+  - $ref: touchscreen.yaml#
+
+properties:
+  compatible:
+    enum:
+      - goodix,gt9886
+      - goodix,gt9896
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  avdd-supply:
+    description: Analog power supply regulator on AVDD pin
+
+  vddio-supply:
+    description: power supply regulator on VDDIO pin
+
+  touchscreen-inverted-x: true
+  touchscreen-inverted-y: true
+  touchscreen-size-x: true
+  touchscreen-size-y: true
+  touchscreen-swapped-x-y: true
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - avdd-supply
+  - touchscreen-size-x
+  - touchscreen-size-y
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/gpio/gpio.h>
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+      touchscreen@5d {
+        compatible = "goodix,gt9886";
+        reg = <0x5d>;
+        interrupt-parent = <&gpio>;
+        interrupts = <9 IRQ_TYPE_LEVEL_LOW>;
+        reset-gpios = <&gpio1 8 GPIO_ACTIVE_LOW>;
+        avdd-supply = <&ts_avdd>;
+        touchscreen-size-x = <1080>;
+        touchscreen-size-y = <2340>;
+      };
+    };
+
+...

-- 
2.51.0