[PATCH v7 0/3] GPMC driver conversion
afzal at ti.com
Wed Sep 5 04:48:52 EDT 2012
Basic gpmc driver conversion series. Driver that is now created out of
gpmc code is a simple one, it handles tasks that were earlier executed
by gpmc_init. Now instead of relying on cpu_is_* checks, it obtains
resources and clk handle in the standard Linux way. The existing gpmc
interface works as was without this series.
HWMOD patch also has been brought into this series back.
As this creates only a basic driver, further gpmc driver work can be
based over this, while having a driver first in place.
This series is based on l-o/testing-cleanup as on 5-Sep-12,
i.e. over commit,
e3a5c14 ARM: OMAP1: Move SoC specific headers from plat to mach for omap1
per Tony's suggestion.
It is available
This series has been tested on omap3evm (rev G).
GPMC (General Purpose Memory Controller) in brief:
GPMC is an unified memory controller dedicated to interfacing external
memory devices like
Asynchronous SRAM like memories and application specific integrated circuit devices.
Asynchronous, synchronous, and page mode burst NOR flash devices NAND flash
GPMC details can be referred in AM335X Technical Reference Manual
Create a simple driver that gets resources & clk the standard Linux way
Pull in HMWOD patch back into this series
v6: Capability flag added that stores features based on revision
Macros used for finding revision
Return value from memory setup function corrected
Comments added to clarify handling of device type, size
Bool type time setting patch removed as has been taken care in 
Handle variable number of waitpin
Warn if driver is unable to configure interrupt
Enhance some of commit messages
Handle shared writeprotect case
Fix a bug in gpmc_create_device
Get clk from hwmod
Remove unwanted code
v5: Make this a purely driver conversion series, i.e. gpmc-mtd
interactions has been made as a separate series, so is adding
hwmod entry for OMAP2/3.
And modifying gpmc peripheral platform initialization has been
separated out of this series, so is migrating boards to use new
driver interface. GPMC driver conversion which was done in a few
patches in v4 has been tranformed to series of small patches.
Also care has been taken care that old interface will not break
with any of these patches, so both interfaces can coexist.
This helps in converting boards one-by-one gradually. Acquiring
CS has been thrown out. And conclusive comments on v4 has been
v4: Handle wait pin (except for interrupts), enhance configuration
& timing interface of GPMC to take care of all boards. Dynamic
allocation of interrupt instead of static. Convert remaining
peripherals to work with GPMC driver. Handle acquiring NAND CS#,
adapt to HWMOD, update HWMOD OMAP2/3 entries, other minor
commenst on v3.
v3: Single device structure passed from platform for peripherals using
multiple CS instead of using multiple device structure having a few
redundant data, handle interrupts, GPMC NAND handling by GPMC NAND
driver instead of GPMC driver
v2: Avoid code movement that kept similar code together (for easy review)
Afzal Mohammed (3):
ARM: OMAP2/3: hwmod data: add gpmc
ARM: OMAP2+: gpmc: Adapt to HWMOD
ARM: OMAP2+: gpmc: minimal driver support
arch/arm/mach-omap2/gpmc.c | 193 +++++++++++++++-----
arch/arm/mach-omap2/omap_hwmod_2420_data.c | 18 ++
arch/arm/mach-omap2/omap_hwmod_2430_data.c | 18 ++
arch/arm/mach-omap2/omap_hwmod_2xxx_ipblock_data.c | 44 +++++-
arch/arm/mach-omap2/omap_hwmod_3xxx_data.c | 54 ++++++
arch/arm/mach-omap2/omap_hwmod_common_data.h | 1 +
arch/arm/mach-omap2/prcm-common.h | 2 +
7 files changed, 282 insertions(+), 48 deletions(-)
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