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

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

[daniel_peng]

From: Daniel Peng <Daniel_Peng@pegatron.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@pegatron.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@pegatron.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

[PATCH v3 2/2] HID: i2c-hid: Add FocalTech FT8112

[daniel_peng]

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

Information for touchscreen model HKO/RB116AS01-2 as below:
- HID :FTSC1000
- slave address:0X38
- Interface:HID over I2C
- Touch control lC:FT8112
- I2C ID: PNP0C50

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

- Modified the subject to include the ID of the chip as suggestion only.

---

(no changes since v1)

 drivers/hid/i2c-hid/i2c-hid-of-elan.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/hid/i2c-hid/i2c-hid-of-elan.c b/drivers/hid/i2c-hid/i2c-hid-of-elan.c
index 0215f217f6d8..b81fcc6ff49e 100644
--- a/drivers/hid/i2c-hid/i2c-hid-of-elan.c
+++ b/drivers/hid/i2c-hid/i2c-hid-of-elan.c
@@ -168,6 +168,13 @@ static const struct elan_i2c_hid_chip_data elan_ekth6a12nay_chip_data = {
 	.power_after_backlight = true,
 };
 
+static const struct elan_i2c_hid_chip_data focaltech_ft8112_chip_data = {
+	.post_power_delay_ms = 10,
+	.post_gpio_reset_on_delay_ms = 150,
+	.hid_descriptor_address = 0x0001,
+	.main_supply_name = "vcc33",
+};
+
 static const struct elan_i2c_hid_chip_data ilitek_ili9882t_chip_data = {
 	.post_power_delay_ms = 1,
 	.post_gpio_reset_on_delay_ms = 200,
@@ -191,6 +198,7 @@ static const struct elan_i2c_hid_chip_data ilitek_ili2901_chip_data = {
 static const struct of_device_id elan_i2c_hid_of_match[] = {
 	{ .compatible = "elan,ekth6915", .data = &elan_ekth6915_chip_data },
 	{ .compatible = "elan,ekth6a12nay", .data = &elan_ekth6a12nay_chip_data },
+	{ .compatible = "focaltech,ft8112", .data = &focaltech_ft8112_chip_data },
 	{ .compatible = "ilitek,ili9882t", .data = &ilitek_ili9882t_chip_data },
 	{ .compatible = "ilitek,ili2901", .data = &ilitek_ili2901_chip_data },
 	{ }
-- 
2.34.1

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

[Conor Dooley]

[-- Attachment #1: Type: text/plain, Size: 3174 bytes --]

On Wed, Nov 12, 2025 at 07:59:04PM +0800, daniel_peng@pegatron.corp-partner.google.com wrote:
> From: Daniel Peng <Daniel_Peng@pegatron.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@pegatron.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.

The patch seems okay me me, other than this which a) should be below the
--- and also does not appear to even be accurate? The last bullet in
doesn't match the patch contents.
Move this out of the commit and then
Acked-by: Conor Dooley <conor.dooley@microchip.com>
pw-bot: changes-requested

Thanks,
Conor.

> 
> ---
> 
> (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@pegatron.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
> 

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