[RFC PATCH 00/16] mtd: rawnand: NV-DDR support

[Miquel Raynal]

Hello,

After almost 20 years of exclusive SDR support in the Linux kernel and
thanks to the major updates recently done in the NAND subsystem, here is
the final series attempting to bring NV-DDR support to raw NAND
devices.

As always, first patches are here to prepare the field for the second
half which actually brings NV-DDR support bits per bits to make it more
readable and easier to review.

This series is only compile-tested for now, but shows the principles of
my approach. Comments are welcome!

Cheers,
Miquèl

Miquel Raynal (16):
  mtd: rawnand: Add a helper to clarify the interface configuration
  mtd: rawnand: arasan: Check the proposed data interface is supported
  mtd: rawnand: atmel: Check the proposed data interface is supported
  mtd: rawnand: onfi: Use the BIT() macro when possible
  mtd: rawnand: Update dead URL
  mtd: rawnand: Use more recent ONFI specification wording
  mtd: rawnand: Clarify the NV-DDR entries in the ONFI structure
  mtd: rawnand: Add NV-DDR timings
  mtd: rawnand: Retrieve NV-DDR timing modes from the ONFI parameter
    page
  mtd: rawnand: Add an indirection on onfi_fill_interface_config()
  mtd: rawnand: Add onfi_fill_nvddr_interface_config() helper
  mtd: rawnand: Avoid accessing NV-DDR timings from legacy code
  mtd: rawnand: Access SDR and NV-DDR timings through a common macro
  mtd: rawnand: Add a helper to find the closest ONFI NV-DDR mode
  mtd: rawnand: Choose the best timings, NV-DDR included
  mtd: rawnand: arasan: Support NV-DDR interface

 drivers/mtd/nand/raw/arasan-nand-controller.c |  26 +-
 drivers/mtd/nand/raw/atmel/nand-controller.c  |   7 +-
 .../mtd/nand/raw/cadence-nand-controller.c    |   6 +-
 drivers/mtd/nand/raw/gpmi-nand/gpmi-nand.h    |   2 +-
 drivers/mtd/nand/raw/internals.h              |   5 +
 drivers/mtd/nand/raw/nand_base.c              | 228 +++++++---
 drivers/mtd/nand/raw/nand_legacy.c            |   2 +-
 drivers/mtd/nand/raw/nand_onfi.c              |   5 +-
 drivers/mtd/nand/raw/nand_timings.c           | 402 ++++++++++++++++--
 include/linux/mtd/onfi.h                      |  36 +-
 include/linux/mtd/rawnand.h                   | 155 ++++++-
 11 files changed, 757 insertions(+), 117 deletions(-)

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2.27.0