Add SPI NOR driver for Sophgo, including read, write operations.
This driver is only suitable for NOR flash.

---

Changes in v2:

  Fixed following issues as per comments from Yixun Lan, Chen Wang, Inochi Amaoto, thanks.

  - Replaced "sophgo" to "sg2044" to avoid conflicts with other drivers.
  - Improve driver code:
    - Improve coding style.
    - Removed the [PATCH 3/3] in previous submission that based on the baseline not submitted.
    - Added error handler to destroy mutex if probe fail.

Changes in v1:
  You can simply review or test the patches at the link [1].

Link: https://lore.kernel.org/linux-riscv/20250224101213.26003-1-looong.bin@gmail.com/ [1]
---

Longbin Li (2):
  dt-bindings: spi: add SG2044 SPI NOR controller driver
  spi: sophgo: add SG2044 SPI NOR controller driver

 .../bindings/spi/spi-sg2044-nor.yaml          |  52 ++
 drivers/spi/Kconfig                           |   9 +
 drivers/spi/Makefile                          |   1 +
 drivers/spi/spi-sg2044-nor.c                  | 500 ++++++++++++++++++
 4 files changed, 562 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spi/spi-sg2044-nor.yaml
 create mode 100644 drivers/spi/spi-sg2044-nor.c

--
2.48.1

On Tue, 04 Mar 2025 16:35:41 +0800, Longbin Li wrote:
> Add SPI NOR driver for Sophgo, including read, write operations.
> This driver is only suitable for NOR flash.
> 

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next

Thanks!

[1/2] dt-bindings: spi: add SG2044 SPI NOR controller driver
      commit: 9f95e2dff3fe6a5f4cec786a106558bb8f268a16
[2/2] spi: sophgo: add SG2044 SPI NOR controller driver
      commit: de16c322eefbe9026d4eabc8ae934bb778cffd1d

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark