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From: Sanjaikumar V S <sanjaikumarvs@gmail.com>
To: mwalle@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org,
	miquel.raynal@bootlin.com, pratyush@kernel.org, richard@nod.at,
	sanjaikumarvs@gmail.com, sanjaikumar.vs@dicortech.com,
	tudor.ambarus@linaro.org, stable@vger.kernel.org,
	vigneshr@ti.com
Subject: [PATCH v3 0/2] mtd: spi-nor: Fix SST AAI write mode
Date: Mon, 23 Feb 2026 10:17:16 +0000	[thread overview]
Message-ID: <20260223101718.89-1-sanjaikumarvs@gmail.com> (raw)
In-Reply-To: <20260220094236.28-1-sanjaikumarvs@gmail.com>

From: Sanjaikumar V S <sanjaikumar.vs@dicortech.com>

This patch series addresses two distinct problems affecting SST flash
Auto Address Increment write functionality:

1. When writes begin at odd addresses, a single byte is programmed first
   using byte program command, which clears the Write Enable Latch. The
   driver fails to re-enable writes before the AAI sequence.

2. When the SPI controller lacks direct mapping support, the fallback
   path uses a probe-time operation template with standard page program
   opcodes instead of AAI opcodes.

Changes in v3:
- Patch 1/2: Use local boolean 'needs_write_enable' for clarity as
  suggested by Michael Walle
- Patch 1/2: Improved comment explaining the fix
- Patch 1/2: Added Fixes tag

Changes in v2:
- Split fixes into separate patches
- Added detailed commit messages

Sanjaikumar V S (2):
  mtd: spi-nor: sst: Fix write enable before AAI sequence
  mtd: spi-nor: core: Fix AAI mode when dirmap is not available

 drivers/mtd/spi-nor/core.c |  2 +-
 drivers/mtd/spi-nor/sst.c  | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

--
2.43.0


______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/

WARNING: multiple messages have this Message-ID (diff)
From: Sanjaikumar V S <sanjaikumarvs@gmail.com>
To: mwalle@kernel.org
Cc: linux-kernel@vger.kernel.org, linux-mtd@lists.infradead.org,
	miquel.raynal@bootlin.com, pratyush@kernel.org, richard@nod.at,
	sanjaikumarvs@gmail.com, sanjaikumar.vs@dicortech.com,
	tudor.ambarus@linaro.org, stable@vger.kernel.org,
	vigneshr@ti.com
Subject: [PATCH v3 0/2] mtd: spi-nor: Fix SST AAI write mode
Date: Mon, 23 Feb 2026 10:17:16 +0000	[thread overview]
Message-ID: <20260223101718.89-1-sanjaikumarvs@gmail.com> (raw)
In-Reply-To: <20260220094236.28-1-sanjaikumarvs@gmail.com>

From: Sanjaikumar V S <sanjaikumar.vs@dicortech.com>

This patch series addresses two distinct problems affecting SST flash
Auto Address Increment write functionality:

1. When writes begin at odd addresses, a single byte is programmed first
   using byte program command, which clears the Write Enable Latch. The
   driver fails to re-enable writes before the AAI sequence.

2. When the SPI controller lacks direct mapping support, the fallback
   path uses a probe-time operation template with standard page program
   opcodes instead of AAI opcodes.

Changes in v3:
- Patch 1/2: Use local boolean 'needs_write_enable' for clarity as
  suggested by Michael Walle
- Patch 1/2: Improved comment explaining the fix
- Patch 1/2: Added Fixes tag

Changes in v2:
- Split fixes into separate patches
- Added detailed commit messages

Sanjaikumar V S (2):
  mtd: spi-nor: sst: Fix write enable before AAI sequence
  mtd: spi-nor: core: Fix AAI mode when dirmap is not available

 drivers/mtd/spi-nor/core.c |  2 +-
 drivers/mtd/spi-nor/sst.c  | 13 +++++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

--
2.43.0


  parent reply	other threads:[~2026-02-23 10:17 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-02-20  9:42 [PATCH v2 0/2] mtd: spi-nor: Fix SST AAI write mode Sanjaikumar V S
2026-02-20  9:42 ` Sanjaikumar V S
2026-02-20  9:42 ` [PATCH v2 1/2] mtd: spi-nor: sst: Fix write enable before AAI sequence Sanjaikumar V S
2026-02-20  9:42   ` Sanjaikumar V S
2026-02-23  8:18   ` Michael Walle
2026-02-23  8:18     ` Michael Walle
2026-02-23  9:17     ` Sanjaikumar V S
2026-02-23  9:17       ` Sanjaikumar V S
2026-02-23  9:29       ` Michael Walle
2026-02-23  9:29         ` Michael Walle
2026-03-06 22:36         ` Hendrik Donner
2026-03-06 22:36           ` Hendrik Donner
2026-03-13 11:46           ` Pratyush Yadav
2026-03-13 11:46             ` Pratyush Yadav
2026-03-13 12:50             ` Hendrik Donner
2026-03-13 12:50               ` Hendrik Donner
2026-03-13 13:39               ` Pratyush Yadav
2026-03-13 13:39                 ` Pratyush Yadav
2026-02-20  9:42 ` [PATCH v2 2/2] mtd: spi-nor: core: Fix AAI mode when dirmap is not available Sanjaikumar V S
2026-02-20  9:42   ` Sanjaikumar V S
2026-02-23 10:17 ` Sanjaikumar V S [this message]
2026-02-23 10:17   ` [PATCH v3 0/2] mtd: spi-nor: Fix SST AAI write mode Sanjaikumar V S
2026-02-23 10:17   ` [PATCH v3 1/2] mtd: spi-nor: sst: Fix write enable before AAI sequence Sanjaikumar V S
2026-02-23 10:17     ` Sanjaikumar V S
2026-02-23 10:17   ` [PATCH v3 2/2] mtd: spi-nor: core: Fix AAI mode when dirmap is not available Sanjaikumar V S
2026-02-23 10:17     ` Sanjaikumar V S

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