[PATCH v6 0/3] Add support for Loongson-1 NAND

[Keguang Zhang via B4 Relay]

Add the driver and dt-binding document for Loongson-1 NAND.
And modify nand_read_subpage() to allow subpage read by a single operation.

Changes in v6:
- Amend Kconfig
- Add the dt-binding document
- Modify nand_read_subpage() to allow subpage read by a single operation
- Add DT support for driver
- Use DT data instead of platform data
- Remove MAX_ID_SIZE
- Remove case NAND_OP_CMD_INSTR in ls1x_nand_set_controller()
- Move ECC configuration to ls1x_nand_attach_chip()
- Rename variable "nand" to "ls1x"
- Rename variable "nc" to "nfc"
- Some minor fixes
- Link to v5: https://lore.kernel.org/all/20210520224213.7907-1-keguang.zhang@xxxxxxxxx

Changes in v5:
- Update the driver to fit the raw NAND framework.
- Implement exec_op() instead of legacy cmdfunc().
- Use dma_request_chan() instead of dma_request_channel().
- Some minor fixes and cleanups.

Changes in v4:
- Retrieve the controller from nand_hw_control.

Changes in v3:
- Replace __raw_readl/__raw_writel with readl/writel.
- Split ls1x_nand into two structures:
ls1x_nand_chip and ls1x_nand_controller.

Changes in v2:
- Modify the dependency in Kconfig due to the changes of DMA module.

Signed-off-by: Keguang Zhang <keguang.zhang@xxxxxxxxx>
---
Keguang Zhang (3):
      dt-bindings: mtd: Add Loongson-1 NAND Controller
      mtd: rawnand: Enable monolithic read when reading subpages
      mtd: rawnand: Add Loongson-1 NAND Controller driver

 .../devicetree/bindings/mtd/loongson,ls1x-nfc.yaml |  66 ++
 drivers/mtd/nand/raw/Kconfig                       |   7 +
 drivers/mtd/nand/raw/Makefile                      |   1 +
 drivers/mtd/nand/raw/loongson1_nand.c              | 748 +++++++++++++++++++++
 drivers/mtd/nand/raw/nand_base.c                   |   5 +-
 include/linux/mtd/rawnand.h                        |   5 +
 6 files changed, 830 insertions(+), 2 deletions(-)
---
base-commit: 084c8e315db34b59d38d06e684b1a0dd07d30287
change-id: 20240316-loongson1-nand-98327d77e0f6

Best regards,
-- 
Keguang Zhang <keguang.zhang@xxxxxxxxx>