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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next reply other threads:[~2026-02-18 14:35 UTC|newest]
Thread overview: 7+ 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
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