[PATCH v6 00/14] OMAP2+ OneNAND driver update

Ladislav Michl ladis at linux-mips.org
Fri Jan 12 05:11:05 PST 2018

this patch serie updates OMAP2+ OneNAND driver to the present times, making
it fully DT configurable, using libgpio and dmaengine apis.

Please note that unlike previous driver version, which basically ignored
DT specified timings, this one relies on it, so it is important to get
it right in your DT (dumping it from previous kernel version).

In case synchronous timings is requested, it is okay to specify timings
for the slowest chip ever used for you board as it is evetually optimized
after chip probe.

Original driver used DMA only if user specified INT gpio in platform
data, now DMA is used unconditionally and PIO mode is used as fallback.

In case anyone wants to give it a try, few DT related changes are needed:
- onenand node needs 'ti,omap2-onenand' compatible (for mailine boards this is
  done in patch 2)
- to use INT pin, int-gpios needs to be specified.

Most notable changes from v3:
- added dmaengine patches by Peter Ujfalusi
- added dt bindings documentation
- added cleanup patches
- DMA enabled by default

Most notable changes from v4:
- collected tags
- used INT pin name properly
- hopefully all comments taken into account

Most notable changes from v5:
- as this serie is expected to be merged via single tree patches 13 and 14
  were squashed together not to break bisecting.
- patch 16 was dropped.

This patchset depends on an immutable commit:

The following changes since commit 4fbd8d194f06c8a3fd2af1ce560ddb31f7ec8323:

  Linux 4.15-rc1 (2017-11-26 16:01:47 -0800)

are available in the git repository at:

  https://github.com/rogerq/linux.git for-v4.16/gpmc-omap-immutable

for you to fetch changes up to c18a7ac3398d0cef29749f9568666db8321aa4c9:

  memory: omap-gpmc: Make 'bank-width' property optional (2017-12-01 15:37:49 +0200)

Ladislav Michl (12):
  dt-bindings: mtd: gpmc-onenand: Update properties description
  ARM: dts: OMAP2+: Add compatible property to onenand node
  ARM: dts: omap3-igep: Update onenand node timings
  mtd: onenand: omap2: Remove regulator support
  mtd: onenand: omap2: Remove skip initial unlocking support
  mtd: onenand: omap2: Remove partitioning support from platform data
  mtd: onenand: omap2: Account waiting time as waiting on IO
  mtd: onenand: omap2: Unify OMAP2 and OMAP3 DMA implementation
  mtd: onenand: omap2: Do not make delay for GPIO OMAP3 specific
  mtd: onenand: omap2: Decouple DMA enabling from INT pin availability
  mtd: onenand: omap2: Configure driver from DT
  ARM: OMAP2+: Remove gpmc-onenand

Peter Ujfalusi (2):
  mtd: onenand: omap2: Simplify the DMA setup for various paths
  mtd: onenand: omap2: Convert to use dmaengine for memcpy

 .../devicetree/bindings/mtd/gpmc-onenand.txt       |   6 +-
 arch/arm/boot/dts/omap2420-n8x0-common.dtsi        |   1 +
 arch/arm/boot/dts/omap3-igep.dtsi                  |  30 +-
 arch/arm/boot/dts/omap3-n900.dts                   |   1 +
 arch/arm/boot/dts/omap3-n950-n9.dtsi               |   1 +
 arch/arm/boot/dts/omap3430-sdp.dts                 |   1 +
 arch/arm/mach-omap2/Makefile                       |   3 -
 arch/arm/mach-omap2/gpmc-onenand.c                 | 409 ---------------
 drivers/memory/omap-gpmc.c                         | 158 ++++--
 drivers/mtd/onenand/Kconfig                        |   4 +-
 drivers/mtd/onenand/omap2.c                        | 576 ++++++++-------------
 include/linux/omap-gpmc.h                          |  28 +
 include/linux/platform_data/mtd-onenand-omap2.h    |  34 --
 13 files changed, 386 insertions(+), 866 deletions(-)
 delete mode 100644 arch/arm/mach-omap2/gpmc-onenand.c
 delete mode 100644 include/linux/platform_data/mtd-onenand-omap2.h


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