[PATCH v4 0/5] spi: add support for Mediatek SPI-NAND controller

[Chuanhong Guo <gch981213@xxxxxxxxx>]

Mediatek has an extended version of their NAND Flash Interface which
has a SPI-NAND mode. In this mode, the controller can perform 1-bit
spi-mem ops for up-to 0xa0 bytes and typical SPI-NAND single, dual
and quad IO page cache ops with 2-byte address. Additionally, the
page cache ops can be performed with ECC and auto data formatting
using the ECC engine of the controller.

This patchset implements support of this mode as a separated SPI-MEM
driver with piplined ECC engine.

Changes since v1:
 add a blank line between properties in dt binding doc
 rename ecc-engine to nand-ecc-engine for the generic properties
 fix warnings/errors from the CI

Changes since v2:
 use streamed DMA api to avoid an extra memory copy during read
 make ECC engine config a per-nand context
 take user-requested ECC strength into account

Change since v3:
 fix a missed ecc-engine rename in doc from v1

Chuanhong Guo (5):
  mtd: nand: make mtk_ecc.c a separated module
  spi: add driver for MTK SPI NAND Flash Interface
  mtd: nand: mtk-ecc: also parse nand-ecc-engine if available
  dt-bindings: spi: add binding doc for spi-mtk-snfi
  arm64: dts: mediatek: add mtk-snfi for mt7622

 .../bindings/spi/mediatek,spi-mtk-snfi.yaml   |   88 +
 arch/arm64/boot/dts/mediatek/mt7622.dtsi      |   12 +
 drivers/mtd/nand/Kconfig                      |    7 +
 drivers/mtd/nand/Makefile                     |    1 +
 drivers/mtd/nand/{raw/mtk_ecc.c => ecc-mtk.c} |    8 +-
 drivers/mtd/nand/raw/Kconfig                  |    1 +
 drivers/mtd/nand/raw/Makefile                 |    2 +-
 drivers/mtd/nand/raw/mtk_nand.c               |    2 +-
 drivers/spi/Kconfig                           |   10 +
 drivers/spi/Makefile                          |    1 +
 drivers/spi/spi-mtk-snfi.c                    | 1442 +++++++++++++++++
 .../linux/mtd/nand-ecc-mtk.h                  |    0
 12 files changed, 1569 insertions(+), 5 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
 rename drivers/mtd/nand/{raw/mtk_ecc.c => ecc-mtk.c} (98%)
 create mode 100644 drivers/spi/spi-mtk-snfi.c
 rename drivers/mtd/nand/raw/mtk_ecc.h => include/linux/mtd/nand-ecc-mtk.h (100%)

-- 
2.35.1