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Message-Id: <20250706154430.357948-1-kuzhylol@gmail.com>
Date: Sun, 6 Jul 2025 17:44:29 +0200
From: Oleh Kuzhylnyi <kuzhylol@...il.com>
To: Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc: Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Sasha Finkelstein <fnkl.kernel@...il.com>,
Javier Carrasco <javier.carrasco.cruz@...il.com>,
Linus Walleij <linus.walleij@...aro.org>,
Javier Martinez Canillas <javierm@...hat.com>,
Janne Grunau <j@...nau.net>,
Igor Opaniuk <igor.opaniuk@...il.com>,
Neal Gompa <neal@...pa.dev>,
Jeff LaBundy <jeff@...undy.com>,
Neil Armstrong <neil.armstrong@...aro.org>,
Oleh Kuzhylnyi <kuzhylol@...il.com>,
linux-input@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v9 1/2] dt-bindings: input: touchscreen: add hynitron cst816x series
Add documentation for Hynitron CST816x series touchscreen bindings.
Signed-off-by: Oleh Kuzhylnyi <kuzhylol@...il.com>
---
Changes in v9:
- Adjust linux,keycodes: Add items with event descriptions, and remove maxItems
- Adjust dt example: Fix four-spaces indentation
Changes in v8:
- Update the bindings title to indicate CST816x series support
- Rephrase bindings description to describe controller more precisely
- Remove redundant description field from the reset-gpio property
- Completely remove cst816x,gestures object with all dependants
- Apply linux,keycodes to represent gestures (slide up, slide down, etc.)
- Extend dt example with linux,keycodes
- Align indentation in dt example to use four spaces
Changes in v7:
- Introduce the gestures field along with its sub-fields
- Make reset-gpio property optional
- Extend main description
- Remove "touchscreen" reference
Changes in v6:
- Fix minor tweak adviced by Krzysztof:
- Move additionalProperties field after required
Changes in v5:
- No code changes
Changes in v4:
- Add Conor's Dooley "Reviewed-by" tag
Changes in v3:
- Rename filename to hynitron,cst816s.yaml
- Update description with display details
Changes in v2:
- Apply pin definitions and DT headers
- Use generic name for DT node
- Drop status field
.../input/touchscreen/hynitron,cst816x.yaml | 65 +++++++++++++++++++
1 file changed, 65 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/touchscreen/hynitron,cst816x.yaml
diff --git a/Documentation/devicetree/bindings/input/touchscreen/hynitron,cst816x.yaml b/Documentation/devicetree/bindings/input/touchscreen/hynitron,cst816x.yaml
new file mode 100644
index 000000000000..72d4da636881
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/touchscreen/hynitron,cst816x.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/touchscreen/hynitron,cst816x.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Hynitron CST816x Series Capacitive Touch controller
+
+maintainers:
+ - Oleh Kuzhylnyi <kuzhylol@...il.com>
+
+description: |
+ Bindings for CST816x high performance self-capacitance touch chip series
+ with single point gesture and real two-point operation.
+
+properties:
+ compatible:
+ enum:
+ - hynitron,cst816s
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ reset-gpios:
+ maxItems: 1
+
+ linux,keycodes:
+ minItems: 1
+ items:
+ - description: Slide up gesture
+ - description: Slide down gesture
+ - description: Slide left gesture
+ - description: Slide right gesture
+ - description: Long press gesture
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/input/linux-event-codes.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ touchscreen@15 {
+ compatible = "hynitron,cst816s";
+ reg = <0x15>;
+ interrupt-parent = <&gpio0>;
+ interrupts = <4 IRQ_TYPE_EDGE_RISING>;
+ reset-gpios = <&gpio 17 GPIO_ACTIVE_LOW>;
+ linux,keycodes = <KEY_UP>, <KEY_DOWN>, <KEY_LEFT>, <KEY_RIGHT>,
+ <BTN_TOOL_TRIPLETAP>;
+ };
+ };
+
+...
--
2.34.1
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