[PATCH v5 00/16] OMAP2+ OneNAND driver update

Ladislav Michl
2017-11-15T16:24:02Z

this patch serie updates OMAP2+ OneNAND driver to the present times, making
it fully DT configurable, using libgpio and dmaengine apis - those are
optional, driver will work without them.

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 (for n900 and n8x0 this is
done in patch 16, however patch lacks pinmux configuration.

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

Also note that driver will fail probe OneNAND chip after patch 13 and start
working again after patch 14.

Testing and benchmarking very welcome.

Depends on "memory: omap-gpmc: Make 'bank-width' property optional"
https://patchwork.kernel.org/patch/10043259/

Ladislav Michl (14):
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
memory: omap-gpmc: Refactor OneNAND support
mtd: onenand: omap2: Configure driver from DT
ARM: OMAP2+: Remove gpmc-onenand
ARM: dts: Nokia: Use OneNAND INT pin

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 | 5 +-
arch/arm/boot/dts/omap3-igep.dtsi | 30 +-
arch/arm/boot/dts/omap3-n900.dts | 3 +-
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 | 3 +-
drivers/mtd/onenand/omap2.c | 576 ++++++++-------------
include/linux/omap-gpmc.h | 28 +
include/linux/platform_data/mtd-onenand-omap2.h | 34 --
13 files changed, 387 insertions(+), 870 deletions(-)
delete mode 100644 arch/arm/mach-omap2/gpmc-onenand.c
delete mode 100644 include/linux/platform_data/mtd-onenand-omap2.h

--
2.11.0