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spi: spi-mem: Add a packed command operation

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Instead of repeating the command opcode twice, some flash devices try to
pack command and address bits. In this case, the second opcode byte
being sent (LSB) is free to be used. The input data must be ANDed to
only provide the relevant bits.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://patch.msgid.link/20260410-winbond-6-19-rc1-oddr-v1-2-2ac4827a3868@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Miquel Raynal
2026-04-10 19:41:02 +02:00
committed by Mark Brown
parent 5e75c1d4d3
commit f79ee9e4b2
1 changed files with 8 additions and 0 deletions
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8
include/linux/spi/spi-mem.h
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@@ -28,6 +28,14 @@
.dtr = true, \
}
#define SPI_MEM_DTR_OP_PACKED_CMD(__opcode, __addr, __buswidth) \
{ \
.nbytes = 2, \
.opcode = __opcode << 8 | __addr, \
.buswidth = __buswidth, \
.dtr = true, \
}
#define SPI_MEM_OP_ADDR(__nbytes, __val, __buswidth) \
{ \
.nbytes = __nbytes, \