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Message-ID: <f591d7d3-a728-af1f-d74d-24aec140fd46@linaro.org>
Date:   Wed, 7 Jun 2023 15:59:18 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Cong Yang <yangcong5@...qin.corp-partner.google.com>,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, dmitry.torokhov@...il.com, jikos@...nel.org,
        benjamin.tissoires@...hat.com, dianders@...omium.org,
        hsinyi@...gle.com
Cc:     linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/2] dt-bindings: HID: i2c-hid: ilitek: Introduce
 bindings for Ilitek ili9882t

On 07/06/2023 15:34, Cong Yang wrote:
> The ili9882t touch screen chip same as Elan eKTH6915 controller
> has a reset gpio. The difference is that ili9882t needs to use
> vccio-supply instead of vcc33-supply. Doug's series[1] allows panels
> and touchscreens to power on/off together, let's add a phandle for this.
> 
> [1]: https: //lore.kernel.org/all/20230523193017.4109557-1-dianders@...omium.org/
> 
> Signed-off-by: Cong Yang <yangcong5@...qin.corp-partner.google.com>
> ---
>  .../bindings/input/ilitek,ili9882t.yaml       | 67 +++++++++++++++++++
>  1 file changed, 67 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml
> 
> diff --git a/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml b/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml
> new file mode 100644
> index 000000000000..f69fa3aaf4c5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/ilitek,ili9882t.yaml
> @@ -0,0 +1,67 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/input/ilitek,ili9882t.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Ilitek ili9882t touchscreen controller
> +
> +maintainers:
> +  - Dmitry Torokhov <dmitry.torokhov@...il.com>
> +
> +description:
> +  Supports the Ilitek ili9882t touchscreen controller.
> +  This touchscreen controller uses the i2c-hid protocol with a reset GPIO.
> +
> +properties:
> +  compatible:
> +    items:

Drop items, just const.

> +      - const: ilitek,ili9882t
> +
> +  reg:
> +    const: 0x41
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  panel:
> +    description: If this is a touchscreen, the panel it's connected to. This
> +      indicates that the panel and touchscreen are expected to be power
> +      sequenced together.
> +    $ref: /schemas/types.yaml#/definitions/phandle

"If this is a touchscreen"? Doesn't you description say this is
touchscreen controller? Then how this could be also not a touchscreen?

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

missing maxItems


Best regards,
Krzysztof

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