linux-kernel - [PATCH v3 1/2] dt-bindings: input: i2c-hid: Introduce FocalTech FT8112

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Message-Id: <20251112195751.v3.1.I894dde5015f4acad94cb5bada61e5811c5142395@changeid>
Date: Wed, 12 Nov 2025 19:59:04 +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 v3 1/2] dt-bindings: input: i2c-hid: Introduce FocalTech FT8112

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

The FocalTech FT8112 touch screen chip same as Ilitek ili2901 controller
has a reset gpio. The difference is that they have different
post_gpio_reset_on_delay_ms.
FocalTech FT8112 also uses 3.3V power supply.

Signed-off-by: Daniel Peng <Daniel_Peng@...atron.corp-partner.google.com>
- Modified the subject description.
- Modified maintainers to myself of this binding file.
- Fixed the extra '>' on section of "interrupts = <15 IRQ_TYPE_LEVEL_LOW>;" and confirm command 'make dt_binding_check' correctly.
- Restored MAINTAINERS file.

---

(no changes since v1)

 .../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