[PATCH v4 0/3] support for amlogic the new SPI IP

[Xianwei Zhao via B4 Relay]

Introduced support for the new SPI IP (SPISG). The SPISG is
a communication-oriented SPI controller from Amlogic,supporting
three operation modes: PIO, block DMA, and scatter-gather DMA.

Add the drivers and device tree bindings corresponding to the SPISG.

Signed-off-by: Xianwei Zhao <xianwei.zhao at amlogic.com>
---
Changes in v4:
- Add resets prop and modify some formats for bindings.
- Remove irrelevant headers files and fix some issues.
- Link to v3: https://lore.kernel.org/r/20250623-spisg-v3-0-c731f57e289c@amlogic.com

Changes in v3:
- Rename of bit definition and fix some issues.
- Enable runtime_suspend function.
- Link to v2: https://lore.kernel.org/r/20250617-spisg-v2-0-51a605a84bd5@amlogic.com

Changes in v2:
- Use regmap to operation register and drop bitfied define.
- Use "SPISG" prefix intead of "SPICC", and declare clock div table in the spisg_device. 
- Delete other power operation functions except for runtime_supspend and runtime_resume.
- Fix some format corrections.
- Link to v1: https://lore.kernel.org/r/20250604-spisg-v1-0-5893dbe9d953@amlogic.com

---
Sunny Luo (2):
      spi: dt-bindings: Add binding document of Amlogic SPISG controller
      spi: Add Amlogic SPISG driver

Xianwei Zhao (1):
      MAINTAINERS: Add an entry for Amlogic spi driver

 .../devicetree/bindings/spi/amlogic,a4-spisg.yaml  |  59 ++
 MAINTAINERS                                        |   9 +
 drivers/spi/Kconfig                                |   9 +
 drivers/spi/Makefile                               |   1 +
 drivers/spi/spi-amlogic-spisg.c                    | 871 +++++++++++++++++++++
 5 files changed, 949 insertions(+)
---
base-commit: bd30b995df8fd053e13d10f78dbc7b2fa5ed1aae
change-id: 20250603-spisg-78f21682ebac

Best regards,
-- 
Xianwei Zhao <xianwei.zhao at amlogic.com>