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@huaqin.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@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

On Tue, Aug 19, 2025 at 11:48:51AM +0800, Langyan Ye wrote:
> 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@huaqin.corp-partner.google.com>

A nit, subject: drop second/last, redundant "bindings for". The
"dt-bindings" prefix is already stating that these are bindings.
See also:
https://elixir.bootlin.com/linux/v6.7-rc8/source/Documentation/devicetree/bindings/submitting-patches.rst#L18

Just "Add foo bar"


> ---
>  .../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.

Describe the hardware, not what binding supports. You just repeated
title, BTW.

> +  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

Drop

> +
> +  reset-gpios:
> +    maxItems: 1
> +    description: Reset GPIO.

Drop description, redundant.

> +
> +  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

unevaluatedProperties instead

Best regards,
Krzysztof

On Tue, 19 Aug 2025 11:48:51 +0800, Langyan Ye wrote:
> 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@huaqin.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
> 

My bot found errors running 'make dt_binding_check' on your patch:

yamllint warnings/errors:

dtschema/dtc warnings/errors:


doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/project/devicetree-bindings/patch/20250819034852.1230264-2-yelangyan@huaqin.corp-partner.google.com

The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.