[PATCH v4 0/2] spi: realtek: Add support for RTD1625 SPI NOR Flash Controller

[Yu-Chun Lin]

Hi all,

This patch series introduces support for the Realtek RTD1625 SPI NOR Flash
controller.

Thansk,
Yu-Chun
---
Changes since v2:
General:
- Specify "NOR" in the commit message and descriptions to avoid future
conflicts with SPI NAND or GSPI.

Patch 1:
- Add Conor's acked-by tag.

Patch 2:
- Add Yu-Chun's last name.
- Make SPDX license and copyright notice headers in C++-style.
- Drop driver-internal polling (rtk_spi_read_status()), leaving the status
polling and timeout handling to framework.
- Track the 4-byte addressing state and properly restore it in rtk_spi_init()
to prevent state loss during runtime PM suspend/resume.
- Add hardware cleanup in rtk_spi_dma_transfer() to explicitly trigger a
graceful stop of the DMA engine if a timeout occurs.
- Check bounds against the direct mapping window (dirmap_size) in both PIO and
DMA transfer paths.
- Add reset_control_assert() in the probe error path and .remove().
- Replace RUNTIME_PM_OPS() + SYSTEM_SLEEP_PM_OPS() with
DEFINE_RUNTIME_DEV_PM_OPS().

v3: https://lore.kernel.org/lkml/20260908111640.2032749-1-eleanor.lin@xxxxxxxxxxx/
v2: https://lore.kernel.org/lkml/20260906145755.1230079-1-eleanor.lin@xxxxxxxxxxx/
v1: https://lore.kernel.org/lkml/20260904031252.244280-1-eleanor.lin@xxxxxxxxxxx/

Jyan Chou (2):
  dt-bindings: spi: Add Realtek RTD1625 SPI NOR support
  spi: spi-mem: Add Realtek SPI NOR flash controller driver

 .../bindings/spi/realtek,rtd1625-nor.yaml     |  65 ++
 MAINTAINERS                                   |   6 +
 drivers/spi/Kconfig                           |  10 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-rtk-nor.c                     | 623 ++++++++++++++++++
 5 files changed, 705 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/realtek,rtd1625-nor.yaml
 create mode 100644 drivers/spi/spi-rtk-nor.c

-- 
2.43.0