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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>
This commit is contained in:
Théo Lebrun
2024-04-10 11:29:06 +02:00
committed by Mark Brown
parent 52826aee48
commit eb4fdb4bf4
1 changed files with 0 additions and 1 deletions
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1
Documentation/devicetree/bindings/spi/cdns,qspi-nor.yaml
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@@ -146,7 +146,6 @@ required:
- reg
- interrupts
- clocks
- cdns,fifo-depth
- cdns,fifo-width
- cdns,trigger-address
- '#address-cells'