linux-toradex.git/include/linux/mtd, branch v2.6.25.4

[MTD] Add mtd panic_write function pointer

2008-02-07T10:30:48+00:00

MTDs are well suited for logging critical data and the mtdoops driver
allows kernel panics/oops to be written to flash in a blackbox flight
recorder fashion allowing better debugging and analysis of crashes.

Any kernel oops in user context can be easily handled since the kernel
continues as normal and any queued mtd writes are scheduled. Any kernel
oops in interrupt context results in a panic and the delayed writes will
not be scheduled however. The existing mtd->write function cannot be
called in interrupt context so these messages can never be written to
flash.

This patch adds a panic_write function pointer that drivers can
optionally implement which can be called in interrupt context. It is
only intended to be called when its known the kernel is about to panic
and we need to write to succeed. Since the kernel is not going to be
running for much longer, this function can break locks and delay to
ensure the write succeeds (but not sleep).

Signed-off-by: Richard Purdie 
Signed-off-by: David Woodhouse

Merge git://git.infradead.org/~dedekind/ubi-2.6

2008-02-03T11:07:40+00:00

Merge git://git.infradead.org/~kmpark/onenand-mtd-2.6

2008-02-03T07:31:04+00:00

[MTD] Factor out OF partition support from the NOR driver.

2008-02-03T07:06:48+00:00

Signed-off-by: Scott Wood 
Signed-off-by: David Woodhouse

[MTD] [OneNAND] Get correct density from device ID

2008-01-29T08:11:38+00:00

Use the higher bits for other purpose.

Signed-off-by: Kyungmin Park

UBI: introduce atomic LEB change ioctl

2008-01-25T14:41:25+00:00

We have to be able to change individual LEBs for utilities like
ubifsck, ubifstune. For example, ubifsck has to be able to fix
errors on the media, ubifstune has to be able to change the
the superblock, hence this ioctl.

Signed-off-by: Artem Bityutskiy

[MTD] [NOR] Fix incorrect interface code for x16/x32 chips

2008-01-10T22:07:12+00:00

According to "Common Flash Memory Interface Publication 100" dated December 1,
2001, the interface code for x16/x32 chips is 0x0005, and not 0x0004 used so
far.

Signed-off-by: Bartlomiej Sieka 
Signed-off-by: David Woodhouse

UBI: add ubi_leb_map interface

2007-12-26T17:15:14+00:00

The idea of this interface belongs to Adrian Hunter. The
interface is extremely useful when one has to have a guarantee
that an LEB will contain all 0xFFs even in case of an unclean
reboot. UBI does have an 'ubi_leb_erase()' call which may do
this, but it is stupid and ineffecient, because it flushes whole
queue. I should be re-worked to just be a pair of unmap,
map calls.

The user of the interfaci is UBIFS at the moment.

Signed-off-by: Artem Bityutskiy

[MTD] Provide mtdram.h with mtdram_init_device() prototype

2007-11-06T08:40:24+00:00

This is used by axisflashmap.c to boot from ram.

Signed-off-by: Jesper Nilsson 
Acked-by: Mikael Starvik 
Signed-off-by: Andrew Morton 
Signed-off-by: David Woodhouse

[MTD] [NOR] fix ctrl-alt-del can't reboot for intel flash bug

2007-10-13T13:36:18+00:00

When we press ctrl-alt-del,kernel_restart_prepare will invoke 
cfi_intelext_reboot which will set flash to read array mode, but later 
when device_shutdown is invoked which may put current work queue to 
sleep and other process may be scheduled to running and programming 
flash in not FL_READY mode again. So we can't boot up if this flash is 
used for bootloader.

Signed-off-by: Andrew Morton 
Signed-off-by: David Woodhouse