linux-kernel - [PATCH 02/28] spi: spi-mem: Create a repeated address operation

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Message-Id: <20251031-winbond-v6-17-rc1-oddr-v1-2-be42de23ebf1@bootlin.com>
Date: Fri, 31 Oct 2025 18:26:46 +0100
From: Miquel Raynal <miquel.raynal@...tlin.com>
To: Mark Brown <broonie@...nel.org>, Richard Weinberger <richard@....at>, 
 Vignesh Raghavendra <vigneshr@...com>
Cc: Tudor Ambarus <tudor.ambarus@...aro.org>, 
 Pratyush Yadav <pratyush@...nel.org>, 
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, 
 Steam Lin <STLin2@...bond.com>, Santhosh Kumar K <s-k6@...com>, 
 linux-spi@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-mtd@...ts.infradead.org, Miquel Raynal <miquel.raynal@...tlin.com>
Subject: [PATCH 02/28] spi: spi-mem: Create a repeated address operation

In octal DTR mode, while the command opcode is *always* repeated,
addresses may either be long enough to cover at least two bytes (in
which case the existing macro works), or otherwise for single byte
addresses, the byte must also be duplicated and sent twice: on each
front of the clock. Create a macro for this common case.

Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---
 include/linux/spi/spi-mem.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h
index 81c9c7e793b6ab894675e0198d412d84b8525c2e..e4db0924898ce5b17d2b6d4269495bb968db2871 100644
--- a/include/linux/spi/spi-mem.h
+++ b/include/linux/spi/spi-mem.h
@@ -43,6 +43,14 @@
 		.dtr = true,					\
 	}
 
+#define SPI_MEM_DTR_OP_RPT_ADDR(__val, __buswidth)		\
+	{							\
+		.nbytes = 2,					\
+		.val = __val | __val << 8,			\
+		.buswidth = __buswidth,				\
+		.dtr = true,					\
+	}
+
 #define SPI_MEM_OP_NO_ADDR	{ }
 
 #define SPI_MEM_OP_DUMMY(__nbytes, __buswidth)			\

-- 
2.51.0