linux-kernel - [PATCH 3/4] mtd: spi-nor: winbond: Fix locking support for w25q64jvm

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Message-ID: <20260208061919.30498-4-farbere@amazon.com>
Date: Sun, 8 Feb 2026 06:19:18 +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 3/4] mtd: spi-nor: winbond: Fix locking support for w25q64jvm

The Winbond w25q64jvm supports block protection through the Status
Register (SR) and provides a Top/Bottom (TB) protection bit.

Enable SPI_NOR_HAS_LOCK and SPI_NOR_HAS_TB for this device to
properly describe its locking capabilities.

The device uses Status Register bit 5 as the TB bit and supports only
three Block Protect (BP) bits. Therefore, do not set SPI_NOR_TB_SR_BIT6
or SPI_NOR_4BIT_BP.

Reference:
https://www.winbond.com/hq/support/documentation/levelOne.jsp?__locale=en&DocNo=DA00-W25Q64JV.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 6d325da121b4..eaa547d36aad 100644
--- a/drivers/mtd/spi-nor/winbond.c
+++ b/drivers/mtd/spi-nor/winbond.c
@@ -296,6 +296,7 @@ static const struct flash_info winbond_nor_parts[] = {
 		.id = SNOR_ID(0xef, 0x70, 0x17),
 		.name = "w25q64jvm",
 		.size = SZ_8M,
+		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
 		.no_sfdp_flags = SECT_4K,
 	}, {
 		.id = SNOR_ID(0xef, 0x70, 0x18),
-- 
2.47.3