linux-kernel - [PATCH v2 02/27] spi: spi-mem: Create a repeated address operation

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Message-Id: <20260109-winbond-v6-17-rc1-oddr-v2-2-1fff6a2ddb80@bootlin.com>
Date: Fri, 09 Jan 2026 18:18:00 +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 v2 02/27] spi: spi-mem: Create a repeated address operation

In octal DTR mode 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 81c9c7e793b6..e4db0924898c 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)			\

-- 
2.51.1