linux-stable.git/include/linux/mtd/nand.h, branch v4.12.2

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: 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

mtd: nand: Move Toshiba specific init/detection logic in nand_toshiba.c

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

Move Toshiba specific initialization and detection logic into
nand_toshiba.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 Hynix specific init/detection logic in nand_hynix.c

2017-03-08T22:21:20+00:00

Move Hynix specific initialization and detection logic into
nand_hynix.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 Samsung specific init/detection logic in nand_samsung.c

2017-03-08T22:21:20+00:00

Move Samsung specific initialization and detection logic into
nand_samsung.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: Add manufacturer specific initialization/detection steps

2017-03-08T22:21:19+00:00

A lot of NANDs are implementing generic features in a non-generic way,
or are providing advanced auto-detection logic where the NAND ID bytes
meaning changes with the NAND generation.

Providing this vendor specific initialization step will allow us to get
rid of full-id entries in the nand_ids table or all the vendor specific
cases added over the time in the generic NAND ID decoding logic.

Signed-off-by: Boris Brezillon