linux-kernel - Re: [PATCH 2/6] spi: Support multi-bus controllers

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Message-ID: <aPABKMoIbpMhOzxt@debian-BULLSEYE-live-builder-AMD64>
Date: Wed, 15 Oct 2025 17:16:40 -0300
From: Marcelo Schmitt <marcelo.schmitt1@...il.com>
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>,
	Jonathan Cameron <jic23@...nel.org>,
	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 2/6] spi: Support multi-bus controllers

On 10/14, David Lechner wrote:
> Add support for SPI controllers with multiple physical SPI data buses.
> (A data bus in this context means lines connected to a serializer, so a
> controller with two data buses would have two serializers in a single
> controller).
> 
> This is common in the type of controller that can be used with parallel
> flash memories, but can be used for general purpose SPI as well.
> 
> To indicate support, a controller just needs to set ctlr->num_data_bus
> to something greater than 1. Peripherals indicate which bus they are
> connected to via device tree (ACPI support can be added if needed).
> 
> Signed-off-by: David Lechner <dlechner@...libre.com>
> ---
LGTM

Acked-by: Marcelo Schmitt <marcelo.schmitt@...log.com>