linux-kernel - [PATCH 18/28] mtd: spinand: winbond: Register W35N vendor specific operation

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Message-Id: <20251031-winbond-v6-17-rc1-oddr-v1-18-be42de23ebf1@bootlin.com>
Date: Fri, 31 Oct 2025 18:27:02 +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 18/28] mtd: spinand: winbond: Register W35N vendor specific
 operation

Provide the Winbond W35N specific "write VCR register" operation to let
the core verify it is supported by the controller before using it.

Signed-off-by: Miquel Raynal <miquel.raynal@...tlin.com>
---
 drivers/mtd/nand/spi/winbond.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mtd/nand/spi/winbond.c b/drivers/mtd/nand/spi/winbond.c
index 36053f35ee5e84eb355343443a28d274cf7ea5c3..1c13dba08369c48ca26381c634abcea4e7360f30 100644
--- a/drivers/mtd/nand/spi/winbond.c
+++ b/drivers/mtd/nand/spi/winbond.c
@@ -93,6 +93,9 @@ static SPINAND_OP_VARIANTS(update_cache_variants,
 		   SPI_MEM_OP_NO_DUMMY,					\
 		   SPI_MEM_OP_DATA_OUT(1, buf, 1))
 
+static SPINAND_OP_VARIANTS(winbond_w35_ops,
+		SPINAND_WINBOND_WRITE_VCR_1S_1S_1S(0, NULL));
+
 static struct spi_mem_op
 spinand_fill_winbond_write_vcr_op(struct spinand_device *spinand, u8 reg, void *valptr)
 {
@@ -469,6 +472,7 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &write_cache_octal_variants,
 					      &update_cache_octal_variants),
 		     0,
+		     SPINAND_INFO_VENDOR_OPS(&winbond_w35_ops),
 		     SPINAND_ECCINFO(&w35n01jw_ooblayout, NULL),
 		     SPINAND_CONFIGURE_CHIP(w35n0xjw_vcr_cfg)),
 	SPINAND_INFO("W35N02JW", /* 1.8V */
@@ -479,6 +483,7 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &write_cache_octal_variants,
 					      &update_cache_octal_variants),
 		     0,
+		     SPINAND_INFO_VENDOR_OPS(&winbond_w35_ops),
 		     SPINAND_ECCINFO(&w35n01jw_ooblayout, NULL),
 		     SPINAND_CONFIGURE_CHIP(w35n0xjw_vcr_cfg)),
 	SPINAND_INFO("W35N04JW", /* 1.8V */
@@ -489,6 +494,7 @@ static const struct spinand_info winbond_spinand_table[] = {
 					      &write_cache_octal_variants,
 					      &update_cache_octal_variants),
 		     0,
+		     SPINAND_INFO_VENDOR_OPS(&winbond_w35_ops),
 		     SPINAND_ECCINFO(&w35n01jw_ooblayout, NULL),
 		     SPINAND_CONFIGURE_CHIP(w35n0xjw_vcr_cfg)),
 	/* 2G-bit densities */

-- 
2.51.0