Re: [PATCH v4 1/9] spi: dt-bindings: change spi-{rx,tx}-bus-width to arrays

[Jonathan Cameron <jic23@kernel.org>]

On Fri, 19 Dec 2025 15:32:09 -0600
David Lechner <dlechner@baylibre.com> wrote:

> Change spi-rx-bus-width and spi-tx-bus-width properties from single
> uint32 values to arrays of uint32 values. This allows describing SPI
> peripherals connected to controllers that have multiple data lanes for
> receiving or transmitting two or more words in parallel.
> 
> Each index in the array corresponds to a physical data lane (one or more
> wires depending on the bus width). Additional mapping properties will be
> needed in cases where a lane on the controller or peripheral is skipped.
> 
> Bindings that make use of this property are updated in the same commit
> to avoid validation errors.
> 
> The adi,ad4030 binding can now better describe the chips multi-lane
> capabilities, so that binding is refined and gets a new example.
> 
> Converting from single uint32 to array of uint32 does not break .dts/
> .dtb files since there is no difference between specifying a single
> uint32 value and an array with a single uint32 value in devicetree.
> 
> Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>