linux-kernel - [PATCH v2 1/2] dt-bindings: input: goodix,gt9916: Document stylus support

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Message-ID: <20250710115733.226670-2-mitltlatltl@gmail.com>
Date: Thu, 10 Jul 2025 19:57:32 +0800
From: Pengyu Luo <mitltlatltl@...il.com>
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>,
	Thomas Weißschuh <thomas.weissschuh@...utronix.de>,
	Len Brown <len.brown@...el.com>,
	Ingo Molnar <mingo@...nel.org>,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Luke Jones <luke@...nes.dev>,
	"Gustavo A. R. Silva" <gustavoars@...nel.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Eric Biggers <ebiggers@...nel.org>,
	Neil Armstrong <neil.armstrong@...aro.org>
Cc: Charles Wang <charles.goodix@...il.com>,
	linux-input@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Pengyu Luo <mitltlatltl@...il.com>
Subject: [PATCH v2 1/2] dt-bindings: input: goodix,gt9916: Document stylus support

Document stylus support. Optional support for DT properties:
  - `goodix,stylus-enable`
  - `goodix,stylus-pressure-level`
  - `touchscreen-x-mm`
  - `touchscreen-y-mm`

Signed-off-by: Pengyu Luo <mitltlatltl@...il.com>
---
 .../bindings/input/touchscreen/goodix,gt9916.yaml    | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/input/touchscreen/goodix,gt9916.yaml b/Documentation/devicetree/bindings/input/touchscreen/goodix,gt9916.yaml
index c40d92b7f..e56d74ae4 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/goodix,gt9916.yaml
+++ b/Documentation/devicetree/bindings/input/touchscreen/goodix,gt9916.yaml
@@ -43,6 +43,18 @@ properties:
   touchscreen-size-x: true
   touchscreen-size-y: true
   touchscreen-swapped-x-y: true
+  touchscreen-x-mm: true
+  touchscreen-y-mm: true
+
+  goodix,stylus-enable:
+    type: boolean
+
+  goodix,stylus-pressure-level:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      Number of discrete pressure levels supported by the stylus.
+      The reported ABS_PRESSURE range will be 0 to
+      (goodix,stylus-pressure-level - 1).
 
 additionalProperties: false
 
-- 
2.50.0