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From: Eliav Farber <farbere@amazon.com>
To: <tudor.ambarus@linaro.org>, <pratyush@kernel.org>,
	<mwalle@kernel.org>, <miquel.raynal@bootlin.com>,
	<richard@nod.at>, <vigneshr@ti.com>,
	<linux-mtd@lists.infradead.org>, <linux-kernel@vger.kernel.org>
Cc: <farbere@amazon.com>
Subject: [PATCH v2 0/3] mtd: spi-nor: winbond: Fix protection handling
Date: Wed, 18 Feb 2026 14:35:20 +0000	[thread overview]
Message-ID: <20260218143523.17467-1-farbere@amazon.com> (raw)

This series fixes block protection handling for the following Winbond
SPI-NOR devices:
 - w25q256jwm
 - w25q256jw
 - w25q64jvm

The devices do not correctly describe their Status Register layout and
protection capabilities (locking flags, TB bit, BP bit configuration).
As a result, the spi-nor core rejects protection requests and locking
operations fail with -EINVAL, e.g.:

  flash_lock -l /dev/mtd29
  flash_lock: error!: could not lock device: /dev/mtd29
  error 22 (Invalid argument)

Update the device flags to match the actual hardware behavior so that
locking and unlocking regions work correctly.

All changes were validated using flash_lock on the affected devices.

Changes in v2:
- Remove last patch in series that added dual/quad read for w25q64jvm
- Added Minimum testing requirements for w25q256jwm and w25q64jvm

Eliav Farber (3):
  mtd: spi-nor: winbond: Fix locking support for w25q256jwm
  mtd: spi-nor: winbond: Fix locking support for w25q256jw
  mtd: spi-nor: winbond: Fix locking support for w25q64jvm

 drivers/mtd/spi-nor/winbond.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

-- 
2.47.3


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             reply	other threads:[~2026-02-18 14:35 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-18 14:35 Eliav Farber [this message]
2026-02-18 14:35 ` [PATCH v2 1/3] mtd: spi-nor: winbond: Fix locking support for w25q256jwm Eliav Farber
2026-02-18 14:35 ` [PATCH v2 2/3] mtd: spi-nor: winbond: Fix locking support for w25q256jw Eliav Farber
2026-02-18 14:35 ` [PATCH v2 3/3] mtd: spi-nor: winbond: Fix locking support for w25q64jvm Eliav Farber
2026-02-19  7:51 ` [PATCH v2 0/3] mtd: spi-nor: winbond: Fix protection handling Michael Walle
2026-02-19  8:59   ` Farber, Eliav
2026-02-19  9:05     ` Michael Walle
2026-03-30 14:10 ` Pratyush Yadav
2026-03-30 14:22   ` Miquel Raynal
2026-03-30 14:59     ` Pratyush Yadav

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