linux-toradex.git/include/linux/mtd, branch v4.12-rc4

Merge tag 'for-linus-20170510' of git://git.infradead.org/linux-mtd

2017-05-11T17:44:22+00:00

Pull MTD updates from Brian Norris:
 "NAND, from Boris:
   - some minor fixes/improvements on existing drivers (fsmc, gpio, ifc,
     davinci, brcmnand, omap)
   - a huge cleanup/rework of the denali driver accompanied with core
     fixes/improvements to simplify the driver code
   - a complete rewrite of the atmel driver to support new DT bindings
     make future evolution easier
   - the addition of per-vendor detection/initialization steps to avoid
     extending the nand_ids table with more extended-id entries

  SPI NOR, from Cyrille:
   - fixes in the hisi, intel and Mediatek SPI controller drivers
   - fixes to some SPI flash memories not supporting the Chip Erase
     command.
   - add support to some new memory parts (Winbond, Macronix, Micron,
     ESMT).
   - add new driver for the STM32 QSPI controller

  And a few fixes for Gemini and Versatile platforms on physmap-of"

* tag 'for-linus-20170510' of git://git.infradead.org/linux-mtd: (100 commits)
  MAINTAINERS: Update NAND subsystem git repositories
  mtd: nand: gpio: update binding
  mtd: nand: add ooblayout for old hamming layout
  mtd: oxnas_nand: Allocating more than necessary in probe()
  dt-bindings: mtd: Document the STM32 QSPI bindings
  mtd: mtk-nor: set controller's address width according to nor flash
  mtd: spi-nor: add driver for STM32 quad spi flash controller
  mtd: nand: brcmnand: Check flash #WP pin status before nand erase/program
  mtd: nand: davinci: add comment on NAND subpage write status on keystone
  mtd: nand: omap2: Fix partition creation via cmdline mtdparts
  mtd: nand: NULL terminate a of_device_id table
  mtd: nand: Fix a couple error codes
  mtd: nand: allow drivers to request minimum alignment for passed buffer
  mtd: nand: allocate aligned buffers if NAND_OWN_BUFFERS is unset
  mtd: nand: denali: allow to override revision number
  mtd: nand: denali_dt: use pdev instead of ofdev for platform_device
  mtd: nand: denali_dt: remove dma-mask DT property
  mtd: nand: denali: support 64bit capable DMA engine
  mtd: nand: denali_dt: enable HW_ECC_FIXUP for Altera SOCFPGA variant
  mtd: nand: denali: support HW_ECC_FIXUP capability
  ...

Merge tag 'nand/for-4.12' of github.com:linux-nand/linux into MTD

2017-05-01T20:36:44+00:00

From Boris:
"""
This pull request contains:

 - some minor fixes/improvements on existing drivers (fsmc, gpio, ifc,
   davinci, brcmnand, omap)
 - a huge cleanup/rework of the denali driver accompanied with core
   fixes/improvements to simplify the driver code
 - a complete rewrite of the atmel driver to support new DT bindings
   make future evolution easier
 - the addition of per-vendor detection/initialization steps to avoid
   extending the nand_ids table with more extended-id entries
"""

mtd: nand: allow drivers to request minimum alignment for passed buffer

2017-04-25T12:18:38+00:00

In some cases, nand_do_{read,write}_ops is passed with unaligned
ops->datbuf.  Drivers using DMA will be unhappy about unaligned
buffer.

The new struct member, buf_align, represents the minimum alignment
the driver require for the buffer.  If the buffer passed from the
upper MTD layer does not have enough alignment, nand_do_*_ops will
use bufpoi.

Signed-off-by: Masahiro Yamada 
Signed-off-by: Boris Brezillon

mtd: nand: relax ecc.read_page() return value for uncorrectable ECC

2017-04-25T12:18:31+00:00

The comment for ecc.read_page() requires that it should return
"0 if bitflips uncorrectable".

Actually, drivers could return positive values when uncorrectable
bitflips occur.  For example, nand_read_page_swecc() is the case.
If ecc.correct() returns -EBADMSG for the first ECC sector, and
a positive value for the second one, nand_read_page_swecc() returns
a positive max_bitflips and increments ecc_stats.failed for the same
page.

The requirement can be relaxed by tweaking nand_do_read_ops().
Move the max_bitflips calculation below the retry.

Signed-off-by: Masahiro Yamada 
Suggested-by: Boris Brezillon 
Signed-off-by: Boris Brezillon

mtd: nand: Remove unused chip->write_page() hook

2017-04-25T12:18:30+00:00

The last/only user of the chip->write_page() hook (the Atmel NAND
controller driver) has been reworked and is no longer specifying a custom
->write_page() implementation.
Drop this hook before someone else start abusing it.

Signed-off-by: Boris Brezillon 
Reviewed-by: Masahiro Yamada

mtd: Convert to dynamically allocated bdi infrastructure

2017-04-20T18:09:55+00:00

MTD already allocates backing_dev_info dynamically. Convert it to use
generic infrastructure for this including proper refcounting. We drop
mtd->backing_dev_info as its only use was to pass mtd_bdi pointer from
one file into another and if we wanted to keep that in a clean way, we'd
have to make mtd hold and drop bdi reference as needed which seems
pointless for passing one global pointer...

CC: David Woodhouse 
CC: Brian Norris 
CC: linux-mtd@lists.infradead.org
Reviewed-by: Christoph Hellwig 
Signed-off-by: Jan Kara 
Signed-off-by: Jens Axboe

mtd: use dev_of_node helper in mtd_get_of_node

2017-04-19T18:38:52+00:00

This allows better compile-time optimizations with CONFIG_OF disabled.

Signed-off-by: Rafał Miłecki 
Acked-by: Boris Brezillon 
Signed-off-by: Brian Norris

mtd: nand: Move Macronix specific initialization in nand_macronix.c

2017-03-08T22:21:23+00:00

Move Macronix specific initialization logic into nand_macronix.c. This
is part of the "separate vendor specific code from core" cleanup
process.

Signed-off-by: Boris Brezillon

mtd: nand: Move AMD/Spansion specific init/detection logic in nand_amd.c

2017-03-08T22:21:22+00:00

Move AMD/Spansion specific initialization/detection logic into
nand_amd.c. This is part of the "separate vendor specific code from
core" cleanup process.

Signed-off-by: Boris Brezillon 
Acked-by: Richard Weinberger

mtd: nand: Move Micron specific init logic in nand_micron.c

2017-03-08T22:21:21+00:00

Move Micron specific initialization logic into nand_micron.c. This is
part of the "separate vendor specific code from core" cleanup process.

Signed-off-by: Boris Brezillon 
Acked-by: Richard Weinberger