Unverified Commit 0196932f authored by Miquel Raynal's avatar Miquel Raynal Committed by Mark Brown
Browse files

spi: spi-mem: Make the DTR command operation macro more suitable 



In order to introduce DTR support in SPI NAND, a number of macros had to
be created in the spi-mem layer. One of them remained unused at this
point, SPI_MEM_DTR_OP_CMD. Being in the process of introducing octal DTR
support now, experience shows that as-is the macro is not useful. In
order to be really useful in octal DTR mode, the command opcode (one
byte) must always be transmitted on the 8 data lines on both the rising
and falling edge of the clock. Align the macro with the real needs by
duplicating the opcode in the buffer and doubling its size.

Reviewed-by: default avatarTudor Ambarus <tudor.ambarus@linaro.org>
Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://patch.msgid.link/20260109-winbond-v6-17-rc1-oddr-v2-1-1fff6a2ddb80@bootlin.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent 0f61b186

include/linux/spi/spi-mem.h

+3 −3
Original line number Diff line number Diff line
@@ -20,10 +20,10 @@ 
		.opcode = __opcode,				\

	}



#define SPI_MEM_DTR_OP_CMD(__opcode, __buswidth)		\

#define SPI_MEM_DTR_OP_RPT_CMD(__opcode, __buswidth)		\

	{							\

		.nbytes = 1,					\

		.opcode = __opcode,				\

		.nbytes = 2,					\

		.opcode = __opcode | __opcode << 8,		\

		.buswidth = __buswidth,				\

		.dtr = true,					\

	}