[PATCH v2 0/2] Fix OSPI DMA corruption via FSS_FSAS driver

[Santhosh Kumar K]

On TI K3 SoCs, DMA transfers from OSPI produce corrupted data when the
source address is only 4-byte aligned (not 4K-aligned). The root cause
is XIP read prefetch in the FSS_FSAS_GENREGS wrapper (SYSCONFIG.DISXIP,
bit 7), which is enabled by default.

This series adds a dedicated FSS_FSAS platform driver that disables XIP
prefetch at probe, plus the respective DT binding.

Testing:
This series was tested on TI's
AM62Ax SK with OSPI NAND flash and
AM62Px SK with OSPI NOR flash:

Test log: https://gist.github.com/santhosh21/3ac2a0273065e86315a9b442327c9599
Repo: https://github.com/santhosh21/linux/commits/fsas

Changes in v2:
 - Fix $id in dt-binding
 - Use pm_ptr() instead of pm_sleep_ptr()
 - Link to v1: https://lore.kernel.org/linux-devicetree/20260629065517.868418-1-s-k6@xxxxxx/

Signed-off-by: Santhosh Kumar K <s-k6@xxxxxx>

Santhosh Kumar K (2):
  dt-bindings: memory: Add TI FSS_FSAS binding
  memory: ti-k3-fsas: Add TI FSS_FSAS driver

 .../memory-controllers/ti,am62a-fsas.yaml     | 39 ++++++++++
 drivers/memory/Kconfig                        | 10 +++
 drivers/memory/Makefile                       |  1 +
 drivers/memory/ti-k3-fsas.c                   | 74 +++++++++++++++++++
 4 files changed, 124 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/memory-controllers/ti,am62a-fsas.yaml
 create mode 100644 drivers/memory/ti-k3-fsas.c

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2.34.1