linux-kernel - Re: [PATCH v2 1/4] dt-bindings: input: touchscreen: Add Z2 controller

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Message-ID: <abmpkfnfrbcarqhp7pspxmy4veuiavpy2p5zqe5ljkstveuuzz@ur7grz3zd7xx>
Date: Fri, 29 Nov 2024 08:16:01 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Sasha Finkelstein <fnkl.kernel@...il.com>
Cc: Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>, 
	Alyssa Rosenzweig <alyssa@...enzweig.io>, Dmitry Torokhov <dmitry.torokhov@...il.com>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Henrik Rydberg <rydberg@...math.org>, asahi@...ts.linux.dev, 
	linux-arm-kernel@...ts.infradead.org, linux-input@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/4] dt-bindings: input: touchscreen: Add Z2 controller

On Thu, Nov 28, 2024 at 11:29:16PM +0100, Sasha Finkelstein wrote:
> Add bindings for touchscreen controllers attached using the Z2 protocol.
> Those are present in most Apple devices.
> 
> Signed-off-by: Sasha Finkelstein <fnkl.kernel@...il.com>
> ---
>  .../input/touchscreen/apple,z2-multitouch.yaml     | 69 ++++++++++++++++++++++
>  1 file changed, 69 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml b/Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml
> new file mode 100644
> index 0000000000000000000000000000000000000000..c4c0b41178728d5e0a782979d6eecd32e0a83618
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/touchscreen/apple,z2-multitouch.yaml
> @@ -0,0 +1,69 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/input/touchscreen/apple,z2-multitouch.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Apple touchscreens attached using the Z2 protocol
> +
> +maintainers:
> +  - Sasha Finkelstein <fnkl.kernel@...il.com>
> +
> +description: A series of touschscreen controllers used in Apple products
> +
> +allOf:
> +  - $ref: touchscreen.yaml#
> +  - $ref: /schemas/spi/spi-peripheral-props.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - apple,j293-touchbar
> +      - apple,j493-touchbar
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  reset-gpios:
> +    maxItems: 1
> +
> +  firmware-name:
> +    maxItems: 1
> +
> +  apple,z2-cal-blob:
> +    $ref: /schemas/types.yaml#/definitions/uint8-array
> +    description:
> +      Calibration blob supplied by the bootloader

What is the expected size? Fixed size or maximum?

Add it to the example.

Best regards,
Krzysztof