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Message-ID: <20260208061919.30498-3-farbere@amazon.com>
Date: Sun, 8 Feb 2026 06:19:17 +0000
From: Eliav Farber <farbere@...zon.com>
To: <tudor.ambarus@...aro.org>, <pratyush@...nel.org>, <mwalle@...nel.org>,
<miquel.raynal@...tlin.com>, <richard@....at>, <vigneshr@...com>,
<linux-mtd@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
CC: <farbere@...zon.com>
Subject: [PATCH 2/4] mtd: spi-nor: winbond: Fix locking support for w25q256jw
The Winbond w25q256jw device:
- Supports lock/unlock via SR.
- Has Top/Bottom (TB) protect bit.
- Uses Status Register bit 6 as the Top/Bottom (TB) protect bit.
- Supports four Block Protect (BP) bits.
Update the flash parameters by enabling SPI_NOR_HAS_LOCK, SPI_NOR_HAS_TB,
SPI_NOR_TB_SR_BIT6 and SPI_NOR_4BIT_BP. Without these flags, the locking
configuration is incorrect.
Reference:
https://www.winbond.com/hq/support/documentation/levelOne.jsp?__locale=en&DocNo=DA00-W25Q256JW.1
Signed-off-by: Eliav Farber <farbere@...zon.com>
---
drivers/mtd/spi-nor/winbond.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/mtd/spi-nor/winbond.c b/drivers/mtd/spi-nor/winbond.c
index 55f1209936d5..6d325da121b4 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -274,6 +274,7 @@ static const struct flash_info winbond_nor_parts[] = {
.id = SNOR_ID(0xef, 0x60, 0x19),
.name = "w25q256jw",
.size = SZ_32M,
+ .flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_TB_SR_BIT6 | SPI_NOR_4BIT_BP,
.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
}, {
.id = SNOR_ID(0xef, 0x60, 0x20),
--
2.47.3
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