sata-imx: Fix a typo ...

It looks like comma operator was accidentaly used instead of regular
semicolon. Fix this to avoid confusing future readers of the code.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

fix erasing/protecting flashes with unspecified size ...

fixes: 81737c1 mtd: Fix erasing of devices >4GiB

Several places erased a complete flash partition passing ~0 as count to
erase(). With the above commit count to erase was changed from an unsigned
type to a signed type, so the (count > f->size - offset) check in
erase() no longer triggers and the ~0 count is no longer adjusted to the whole
device size. Among other things this results in saveenv failures on NOR
flashes.
This patch fixes this by introducing an explicit macro for erasing the
whole device which is tested for in erase(). All other negative values
are rejected.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Reported-by: Giorgio <giorgio.nicole@arcor.de>

Merge branch 'for-next/ubifs'

Merge branch 'for-next/ubiformat'

Merge branch 'for-next/rtc'

Merge branch 'for-next/mtd-imx-nand'

Merge branch 'for-next/imx-bbu-nand-fcb'

Merge branch 'for-next/imx'

mtd: nand: export nand_check_erased_buf ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Add function to get ubi number from mtd device ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: umount mounted volumes before detaching a ubi device ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: make ubi_detach_mtd_dev ubi internal ...

We want to extend the functionality of the ubi detach function,
but we don't want to change the original detach function to make
UBI updates easier. This adds a barebox specific detach function
which encapsulates the original UBI function. Also this makes the
original ubi detach function internal to ubi.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: rename cdev.c to barebox.c ...

cdev.c exists in the kernel UBI code, but barebox has completely
different content in this file. rename it to barebox.c to reduce the
number of merge conflicts. Also with the name barebox.c we now have
a place to put other barebox specific UBI code to.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

Move GFP_NOFS to barebox-wrapper ...

This will also be used by upcoming UBIFS update.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Set max_write_size to actual value read from flash ...

Currently max_write_size is set to minimal I/O size. Set to buffer size
read from flash. Required by UBIFS recovery which uses max_write_size
for error detection.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: cfi-flash: Set MTD's writebufsize ...

writebufsize is zero initialized, set actual value during init.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: doc3: Fix wrong format specifier ...

Fixes: 1e009bf mtd: Make erase_info structs 64bit where necessary

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

commands: Create nand_bitflip command ...

This adds a command to flip bits in a Nand flash. This is useful for
testing purposes to check if flipped bits are corrected and if the
driver returns the correct number of bitflips.

The command writes a configurable number of bitflips to a single Nand
page. If the -r option is not given the results are reproducible, so
calling the same command twice will revert the bitflips.

The command uses the raw read/write Nand operations which are probably
less tested than the regular read/write operations, so the command may
produce surprising results.

As of writing the command has been tested with the GPMI Nand driver and
the imx-nand driver with fixes posted.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Make debug options configurable ...

This makes the UBI debug options configurable. This make the debug
options actually available to the user and also allows the compiler
to optimize away the debug code when the options are disabled.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Use mtd_peb_erase ...

mtd_peb_erase provides the same functionality as do_sync_erase. Use it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Use mtd_peb_write ...

mtd_peb_write provides the same functionality as ubi_io_write. Use it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Use mtd_peb_read ...

mtd_peb_read provides the same functionality as ubi_io_read. Use
it.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Use mtd_peb_torture ...

The mtd-peb API provides a torture test derived from the UBI torture
test. Use it. Since the mtd-peb variant of the torture test will also
mark a block as bad when the test fails this also makes a separate
ubi_io_mark_bad unnecessary.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Use mtd_peb_check_all_ff ...

Use mtd-peb function for checking for a all-ff buffer.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: ubi: Use mtd_all_ff/mtd_check_pattern ...

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: Introduce mtd-peb API ...

Code which properly wants to handle Nand flash has to work
in a block based way since blocks are the entities that are erased or
may become bad. The regular mtd API works based on offsets in the device
which introduces unhandy 64bit arithmetics and the requirement to align
buffers to blocks.
This introduces the mtd peb API (PEB for physical Erase Block) which
allows the users to work in a block oriented way. The API is heavily
inspired by the UBI IO layer and in fact can replace parts thereof
later.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ds1307: Configure ds1341 for lowest power mode ...

Empirical observations show that configuring INTCN=1, ECLK=0, EGFIL=0,
DOSF=1 on DS1341 put the chip in the mode where it draws the least
amount fo current.

Add code to configure DS1341 in such a way in case Barebox is the last
code that runs on the processor before being shut down.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

ds1307: Fix a bug in probe() ...

Add missing "~" to bit clearing operation.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

rtc: abracon: Check obtained time for validity ...

Check obtianed time for validity before returning it to the caller
the same way other RTC drivers do.

Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

mtd: doc3: Fix wrong format specifier ...

Fixes: 1e009bf mtd: Make erase_info structs 64bit where necessary

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>