[PATCH v6 0/2] mtd: rawnand: Add NAND controller support on Intel LGM SoC

[Ramuthevar,Vadivel MuruganX]

This patch adds the new IP of Nand Flash Controller(NFC) support
on Intel's Lightning Mountain(LGM) SoC.

DMA is used for burst data transfer operation, also DMA HW supports
aligned 32bit memory address and aligned data access by default.
DMA burst of 8 supported. Data register used to support the read/write
operation from/to device.

NAND controller also supports in-built HW ECC engine.

NAND controller driver implements ->exec_op() to replace legacy hooks,
these specific call-back method to execute NAND operations.

Thank you very much Boris for the reviews, suggestions and valuable inputs.
---
v6:
  - update EBU_ADDR_SELx register base value build it from DT
  - Add tabs in in Kconfig
  - Rob's review comments addressed in YAML file
  - add addr_sel0 and addr_sel1 reg-names in YAML example
v5:
  - replace by 'HSNAND_CLE_OFFS | HSNAND_CS_OFFS' to NAND_WRITE_CMD and NAND_WRITE_ADDR
  - remove the unused macros
  - update EBU_ADDR_MASK(x) macro
  - update the EBU_ADDR_SELx register values to be written
  - add the example in YAML file
v4:
  - add ebu_nand_cs structure for multiple-CS support
  - mask/offset encoding for 0x51 value
  - update macro HSNAND_CTL_ENABLE_ECC
  - drop the op argument and un-used macros.
  - updated the datatype and macros
  - add function disable nand module
  - remove ebu_host->dma_rx = NULL;
  - rename MMIO address range variables to ebu and hsnand
  - implement ->setup_data_interface()
  - update label err_cleanup_nand and err_cleanup_dma
  - add return value check in the nand_remove function
  - add/remove tabs and spaces as per coding standard
  - encoded CS ids by reg property
v3:
  - Add depends on MACRO in Kconfig
  - file name update in Makefile
  - file name update to intel-nand-controller
  - modification of MACRO divided like EBU, HSNAND and NAND
  - add NAND_ALE_OFFS, NAND_CLE_OFFS and NAND_CS_OFFS
  - rename lgm_ to ebu_ and _va suffix is removed in the whole file
  - rename structure and varaibles as per review comments.
  - remove lgm_read_byte(), lgm_dev_ready() and cmd_ctrl() un-used function
  - update in exec_op() as per review comments
  - rename function lgm_dma_exit() by lgm_dma_cleanup()
  - hardcoded magic value  for base and offset replaced by MACRO defined
  - mtd_device_unregister() + nand_cleanup() instead of nand_release()
v2:
  - implement the ->exec_op() to replaces the legacy hook-up.
  - update the commit message
  - YAML compatible string update to intel, lgm-nand-controller
  - add MIPS maintainers and xway_nand driver author in CC

v1:
 - initial version


Ramuthevar Vadivel Murugan (2):
  dt-bindings: mtd: Add Nand Flash Controller support for Intel LGM SoC
  mtd: rawnand: Add NAND controller support on Intel LGM SoC

 .../devicetree/bindings/mtd/intel,lgm-nand.yaml    |  83 +++
 drivers/mtd/nand/raw/Kconfig                       |   8 +
 drivers/mtd/nand/raw/Makefile                      |   1 +
 drivers/mtd/nand/raw/intel-nand-controller.c       | 747 +++++++++++++++++++++
 4 files changed, 839 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/intel,lgm-nand.yaml
 create mode 100644 drivers/mtd/nand/raw/intel-nand-controller.c

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2.11.0