[PATCH v1 1/2] dt-bindings: HID: i2c-hid: parade: Introduce bindings for Parade tc3408
From: Langyan Ye <hidden>
Date: 2025-08-19 03:49:04
Also in:
linux-devicetree, lkml
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, open firmware and flattened device tree bindings, the rest · Maintainers:
Dmitry Torokhov, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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 <redacted> --- .../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@huaqin.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