[v3] mtd: spi-nor: Fix SST AAI write mode

[PATCH v3 0/2] mtd: spi-nor: Fix SST AAI write mode

Sanjaikumar V S posted 2 patches 1 month, 3 weeks ago

Diff against v1 v2 v4
Download series mbox

There is a newer version of this series

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

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[PATCH v3 0/2] mtd: spi-nor: Fix SST AAI write mode

Posted by Sanjaikumar V S 1 month, 3 weeks ago

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(-)

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2.43.0