Re: [PATCH v5 02/17] spi: dt-bindings: add spi-phy-pattern-partition property

On Sat, Jul 18, 2026 at 12:21:01AM +0530, Santhosh Kumar K wrote:
> Add spi-phy-pattern-partition, a per-device phandle property on the
> flash sub-node that allows the DT author to directly reference the
> partition holding the SPI PHY tuning pattern. Used to locate the
> pattern data during PHY tuning when the device cannot load the
> pattern dynamically.
> 
> PHY tuning works by reading a known data pattern from the device
> repeatedly while sweeping controller delay parameters until the
> capture window is stable. For SPI NAND, the driver loads the pattern
> into the page cache once using write-to-cache opcodes, then reads it
> during the sweep. SPI NOR devices have no equivalent opcode, so the
> pattern must be pre-programmed in a dedicated flash partition. One
> partition per device is required to keep the procedure unambiguous
> when multiple devices share a bus.
> 
> Signed-off-by: Santhosh Kumar K <[email protected]>
> ---
>  .../devicetree/bindings/spi/cdns,qspi-nor.yaml  | 17 +++++++++++++++++
>  .../bindings/spi/spi-peripheral-props.yaml      |  7 +++++++
>  2 files changed, 24 insertions(+)

Reviewed-by: Krzysztof Kozlowski <[email protected]>

Best regards,
Krzysztof


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