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* [PATCH v2 0/6] mtd: rawnand: add NVIDIA Tegra NAND flash support
@ 2018-05-27 21:54 Stefan Agner
  0 siblings, 0 replies; only message in thread
From: Stefan Agner @ 2018-05-27 21:54 UTC (permalink / raw)
  To: boris.brezillon, dwmw2, computersforpeace, marek.vasut, robh+dt,
	mark.rutland, thierry.reding, mturquette, sboyd
  Cc: dev, miquel.raynal, richard, marcel, krzk, digetx,
	benjamin.lindqvist, jonathanh, pdeschrijver, pgaikwad,
	mirza.krak, linux-mtd, linux-tegra, devicetree, linux-kernel,
	linux-clk, Stefan Agner

This picks up an older patchset written by Lucas Stach which
adds raw NAND flash support for Tegra 2.

The driver has been reworked to implement the ->exec_op callback.
Some smaller changes and bug fixes have been applied too, but I did
not keep track of them. Since the original patchset has been posted
some years back already, I guess review needs to be done from scratch

This second revision is a rather major overhaul again. There are some
open issues:
- Driver specific DMA enabled (read/write)_page_raw are non functional
  (I am not sure why, or if this is maybe even not possible at all...)
- OOB layout discrepancy
  When using HW BCH support, the location of the ECC bytes changes
  depending on whether extra OOB bytes (tag data) are transmitted or
  not... Writing/Reading should always be with tag enabled or always
  without. I am not sure how to solve this correctly, maybe disallow
  using OOB data with HW ECC completely?


Changes since v1:
- Split controller and NAND chip structure
- Add BCH support
- Allow to select algorithm and strength using device tree
- Improve HW ECC error reporting and use DEC_STATUS_BUF only
- Use SPDX license identifier
- Use per algorithm mtd_ooblayout_ops
- Use setup_data_interface callback for NAND timing configuration

Lucas Stach (4):
  mtd: rawnand: tegra: add devicetree binding
  clk: tegra20: init NDFLASH clock to sensible rate
  ARM: tegra: add Tegra20 NAND flash controller node
  ARM: tegra: enable NAND flash on Colibri T20

Stefan Agner (2):
  mtd: rawnand: add Reed-Solomon error correction algorithm
  mtd: rawnand: add NVIDIA Tegra NAND Flash controller driver

 .../bindings/mtd/nvidia,tegra20-nand.txt      |  62 ++
 MAINTAINERS                                   |   7 +
 arch/arm/boot/dts/tegra20-colibri-512.dtsi    |  16 +
 arch/arm/boot/dts/tegra20.dtsi                |  13 +
 drivers/clk/tegra/clk-tegra20.c               |   1 +
 drivers/mtd/nand/raw/Kconfig                  |   6 +
 drivers/mtd/nand/raw/Makefile                 |   1 +
 drivers/mtd/nand/raw/nand_base.c              |   1 +
 drivers/mtd/nand/raw/tegra_nand.c             | 999 ++++++++++++++++++
 include/linux/mtd/rawnand.h                   |   1 +
 10 files changed, 1107 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mtd/nvidia,tegra20-nand.txt
 create mode 100644 drivers/mtd/nand/raw/tegra_nand.c


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