Re: [PATCH] dt-bindings: iio: light: Add PixArt PAJ7620 gesture sensor

[David Lechner]

On 4/12/26 7:02 PM, Harpreet Saini wrote:
> Signed-off-by: Harpreet Saini <sainiharpreet29@xxxxxxxxx>
> ---
> This is part 1 of a 2-patch series proposing a driver for the PixArt
> PAJ7620 gesture sensor. This patch adds the Device Tree bindings and 

Gesture sensor sounds like input subsystem, not IIO.

> registers the "pixart" vendor prefix. The driver patch will follow in 
> a succeeding branch.
> 
>  .../bindings/iio/light/pixart,paj7620.yaml    | 48 +++++++++++++++++++
>  .../devicetree/bindings/vendor-prefixes.yaml  |  2 +
>  2 files changed, 50 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iio/light/pixart,paj7620.yaml
> 
> diff --git a/Documentation/devicetree/bindings/iio/light/pixart,paj7620.yaml b/Documentation/devicetree/bindings/iio/light/pixart,paj7620.yaml
> new file mode 100644
> index 000000000000..301816485fcc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/light/pixart,paj7620.yaml
> @@ -0,0 +1,48 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/light/pixart,paj7620.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: PixArt PAJ7620 Gesture Sensor
> +
> +maintainers:
> +  - Harpreet Saini <sainiharpreet29@xxxxxxxxx>
> +
> +description: |
> +  The PixArt PAJ7620 is a gesture recognition sensor with an integrated
> +  infrared LED and CMOS array. It communicates over an I2C interface and
> +  provides gesture data via a dedicated interrupt pin.
> +
> +properties:
> +  compatible:
> +    const: pixart,paj7620
> +
> +  reg:
> +    maxItems: 1
> +    description: The I2C address of the sensor.
> +
> +  interrupts:
> +    maxItems: 1
> +    description: Interrupt mapping for the sensor's physical INT pin.
> +

missing power supplies:

vbus-supply: true 
vled-supply: true 
vdd-supply: true

Can also be GPIO controller (if not using SPI bus), so

gpio-controller: true

#gpio-cells:
  const: 2

There is also a SPI bus, but it looks like SPI and I2C would be connected
at the same time (SPI for image data, I2C for register access). Bindings
for that could be complicated, so could wait to add that until there is an
actual user.

In general though, bindings should be as complete as possible even if the
driver doesn't implement some of the features, like gpio controller.

> +required:
> +  - compatible
> +  - reg
> +  - interrupts

power supplies should be required.


> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        paj7620@73 {
> +            compatible = "pixart,paj7620";
> +            reg = <0x73>;
> +            interrupts = <4 IRQ_TYPE_EDGE_FALLING>;
> +        };
> +    };
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index ee7fd3cfe203..d73a0bf62b62 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -1273,6 +1273,8 @@ patternProperties:
>      description: Pine64
>    "^pineriver,.*":
>      description: Shenzhen PineRiver Designs Co., Ltd.
> +  "^pixart,.*":
> +    description: PixArt Imaging Inc.
>    "^pixcir,.*":
>      description: PIXCIR MICROELECTRONICS Co., Ltd
>    "^plantower,.*":