mtd: spi-nor: sfdp: get the 1-1-8 and 1-8-8 protocol from SFDP

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BFPT 17th DWORD contains the information about 1-1-8 and 1-8-8.
Parse BFPT DWORD[17] instruction to determine whether flash
supports 1-1-8 and 1-8-8, and set its dummy cycles accordingly.

Validated only the 1-1-8 read using a macronix flash with
Xilinx board zynq-picozed.

Signed-off-by: JaimeLiao <jaimeliao@mxic.com.tw>
Reviewed-by: Michael Walle <mwalle@kernel.org>
Link: https://lore.kernel.org/r/20231219102103.92738-2-jaimeliao.tw@gmail.com
[ta: update commit message, get rid of extra dereference]
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>

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JaimeLiao 2023-12-19 18:21:03 +08:00 • committed by Tudor Ambarus

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29

drivers/mtd/spi-nor/sfdp.c

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7

drivers/mtd/spi-nor/sfdp.h

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