linux-kernel - [PATCH v1 1/2] dt-bindings: HID: i2c-hid: parade: Introduce bindings for Parade tc3408

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Message-Id: <20250819034852.1230264-2-yelangyan@huaqin.corp-partner.google.com>
Date: Tue, 19 Aug 2025 11:48:51 +0800
From: Langyan Ye <yelangyan@...qin.corp-partner.google.com>
To: dmitry.torokhov@...il.com,
	robh@...nel.org,
	krzk+dt@...nel.org,
	conor+dt@...nel.org,
	jikos@...nel.org,
	bentiss@...nel.org,
	dianders@...omium.org
Cc: linux-input@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Langyan Ye <yelangyan@...qin.corp-partner.google.com>
Subject: [PATCH v1 1/2] dt-bindings: HID: i2c-hid: parade: Introduce bindings for Parade tc3408

The tc3408 touch screen chip same as Elan eKTH6915 controller
has a reset gpio. The difference is that they have different
post_power_delay_ms.

Signed-off-by: Langyan Ye <yelangyan@...qin.corp-partner.google.com>
---
 .../bindings/input/parade,tc3408.yaml         | 72 +++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/parade,tc3408.yaml

diff --git a/Documentation/devicetree/bindings/input/parade,tc3408.yaml b/Documentation/devicetree/bindings/input/parade,tc3408.yaml
new file mode 100644
index 000000000000..25db85e90b18
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/parade,tc3408.yaml
@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/input/parade,tc3408.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Parade tc3408 touchscreen controller
+
+maintainers:
+  - Langyan Ye <yelangyan@...qin.corp-partner.google.com>
+
+description:
+  Supports the Parade tc3408 touchscreen controller.
+  This touchscreen controller uses the i2c-hid protocol with a reset GPIO.
+
+allOf:
+  - $ref: /schemas/input/touchscreen/touchscreen.yaml#
+
+properties:
+  compatible:
+    const: parade,tc3408
+
+  reg:
+    const: 0x24
+
+  interrupts:
+    maxItems: 1
+
+  panel: true
+
+  reset-gpios:
+    maxItems: 1
+    description: Reset GPIO.
+
+  vcc33-supply:
+    description: The 3.3V supply to the touchscreen.
+
+  vccio-supply:
+    description: The 1.8V supply to the touchscreen.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - panel
+  - vcc33-supply
+  - vccio-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: touchscreen@24 {
+        compatible = "parade,tc3408";
+        reg = <0x24>;
+
+        interrupt-parent = <&pio>;
+        interrupts = <15 IRQ_TYPE_LEVEL_LOW>;
+
+        panel = <&panel>;
+        reset-gpios = <&pio 126 GPIO_ACTIVE_LOW>;
+        vcc33-supply = <&pp3300_tchscr_x>;
+        vccio-supply = <&pp1800_tchscr_report_disable>;
+      };
+    };
-- 
2.34.1