spi: dt-bindings: cdns,qspi-nor: make cdns,fifo-depth optional

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Make cdns,fifo-depth devicetree property optional.
Value can be detected at runtime.

Upper SRAMPARTITION register bits are read-only. Procedure to find FIFO
depth is therefore to write 0xFFFFFFFF and read back to get amount of
writeable bits.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://msgid.link/r/20240410-cdns-qspi-mbly-v3-3-7b7053449cf7@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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Théo Lebrun 2024-04-10 11:29:06 +02:00 • committed by Mark Brown

parent 52826aee48

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Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml

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