linux-kernel - Re: [PATCH v5 6/9] spi: dt-bindings: adi,axi-spi-engine: add multi-lane support

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Message-ID: <20260114091154.268d7c1e@jic23-huawei>
Date: Wed, 14 Jan 2026 09:11:54 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: David Lechner <dlechner@...libre.com>
Cc: Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Marcelo Schmitt <marcelo.schmitt@...log.com>,
 Michael Hennerich <michael.hennerich@...log.com>, Nuno Sá
 <nuno.sa@...log.com>, Andy Shevchenko <andy@...nel.org>, Sean Anderson
 <sean.anderson@...ux.dev>, linux-spi@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-iio@...r.kernel.org
Subject: Re: [PATCH v5 6/9] spi: dt-bindings: adi,axi-spi-engine: add
 multi-lane support

On Mon, 12 Jan 2026 11:45:24 -0600
David Lechner <dlechner@...libre.com> wrote:

> Extend the ADI AXI SPI engine binding for multiple data lanes. This SPI
> controller has a capability to read multiple data words at the same
> time (e.g. for use with simultaneous sampling ADCs). The current FPGA
> implementation can support up to 8 data lanes at a time (depending on a
> compile-time configuration option).
> 
> Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
> Signed-off-by: David Lechner <dlechner@...libre.com>
LGTM
Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>

> ---
> v4 changes:
> - Update to use spi-{tx,rx}-bus-width properties.
> ---
>  .../devicetree/bindings/spi/adi,axi-spi-engine.yaml       | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml b/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
> index 4b3828eda6cb..0f2448371f17 100644
> --- a/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
> +++ b/Documentation/devicetree/bindings/spi/adi,axi-spi-engine.yaml
> @@ -70,6 +70,21 @@ required:
>  
>  unevaluatedProperties: false
>  
> +patternProperties:
> +  "^.*@[0-9a-f]+":
> +    type: object
> +
> +    properties:
> +      spi-rx-bus-width:
> +        maxItems: 8
> +        items:
> +          enum: [0, 1]
> +
> +      spi-tx-bus-width:
> +        maxItems: 8
> +        items:
> +          enum: [0, 1]
> +
>  examples:
>    - |
>      spi@...00000 {
>