[PATCH v4 00/16] OMAP2+ OneNAND driver update

Ladislav Michl
2017-11-11T21:12:36Z

Hi there,

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 r/b 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 R/B pin, rb-gpios needs to be specified (for n900 and n8x0 this is
done in patch 16, however patch lacks pinmux configuration.

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

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 (13):
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
memory: omap-gpmc: Refactor OneNAND support
mtd: onenand: omap2: Configure driver from DT
ARM: OMAP2+: Remove gpmc-onenand
ARM: dts: Nokia: Use R/B 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 | 2 +
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/omap2.c | 580 ++++++++-------------
include/linux/omap-gpmc.h | 25 +
include/linux/platform_data/mtd-onenand-omap2.h | 34 --
12 files changed, 389 insertions(+), 865 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