linux-kernel - [PATCH v6 1/2] dt-bindings: input: i2c-hid: Introduce FocalTech FT8112

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Message-Id: <20251117094041.300083-1-Daniel_Peng@pegatron.corp-partner.google.com>
Date: Mon, 17 Nov 2025 17:40:40 +0800
From: daniel_peng@...atron.corp-partner.google.com
To: Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-input@...r.kernel.org
Cc: LKML <linux-kernel@...r.kernel.org>,
	Daniel Peng <Daniel_Peng@...atron.corp-partner.google.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Rob Herring <robh@...nel.org>,
	devicetree@...r.kernel.org
Subject: [PATCH v6 1/2] dt-bindings: input: i2c-hid: Introduce FocalTech FT8112

From: Daniel Peng <Daniel_Peng@...atron.corp-partner.google.com>

Create new binding file for the FocalTech FT8112 due to
new touchscreen chip. Confirm its compatible, reg for the
device via vendor, and set the interrupt and reset gpio
to map for Skywalker platform.
FocalTech FT8112 also uses vcc33/vccio power supply.

Signed-off-by: Daniel Peng <Daniel_Peng@...atron.corp-partner.google.com>
---

Changes in v6:
- Remove the commit description for the incorrect section.

 .../bindings/input/focaltech,ft8112.yaml      | 66 +++++++++++++++++++
 1 file changed, 66 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/focaltech,ft8112.yaml

diff --git a/Documentation/devicetree/bindings/input/focaltech,ft8112.yaml b/Documentation/devicetree/bindings/input/focaltech,ft8112.yaml
new file mode 100644
index 000000000000..197f30b14d45
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/focaltech,ft8112.yaml
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/focaltech,ft8112.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: FocalTech FT8112 touchscreen controller
+
+maintainers:
+  - Daniel Peng <Daniel_Peng@...atron.corp-partner.google.com>
+
+description:
+  Supports the FocalTech FT8112 touchscreen controller.
+  This touchscreen controller uses the i2c-hid protocol with a reset GPIO.
+
+allOf:
+  - $ref: /schemas/input/touchscreen/touchscreen.yaml#
+
+properties:
+  compatible:
+    enum:
+      - focaltech,ft8112
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  panel: true
+
+  reset-gpios:
+    maxItems: 1
+
+  vcc33-supply: true
+
+  vccio-supply: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - vcc33-supply
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      touchscreen@38 {
+        compatible = "focaltech,ft8112";
+        reg = <0x38>;
+
+        interrupt-parent = <&pio>;
+        interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+
+        reset-gpios = <&pio 126 GPIO_ACTIVE_LOW>;
+        vcc33-supply = <&pp3300_tchscr_x>;
+      };
+    };
-- 
2.34.1