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* git://git.infradead.org/mtd-2.6: (82 commits)
  [MTD] m25p80: Add Support for ATMEL AT25DF641 64-Megabit SPI Flash
  [MTD] m25p80: add FAST_READ access support to M25Pxx
  [MTD] [NAND] bf5xx_nand: Avoid crash if bfin_mac is installed.
  [MTD] [NAND] at91_nand: control NCE signal
  [MTD] [NAND] AT91 hardware ECC compile fix for at91sam9263 / at91sam9260
  [MTD] [NAND] Hardware ECC controller on at91sam9263 / at91sam9260
  [JFFS2] Introduce dbg_readinode2 log level, use it to shut read_dnode() up
  [JFFS2] Fix jffs2_reserve_space() when all blocks are pending erasure.
  [JFFS2] Add erase_checking_list to hold blocks being marked.
  UBI: add a message
  [JFFS2] Return values of jffs2_block_check_erase error paths
  [MTD] Clean up AR7 partition map support
  [MTD] [NOR] Fix Intel CFI driver for collie flash
  [JFFS2] Finally remove redundant ref->__totlen field.
  [JFFS2] Honour TEST_TOTLEN macro in debugging code. ref->__totlen is going!
  [JFFS2] Add paranoia debugging for superblock counts
  [JFFS2] Fix free space leak with in-band cleanmarkers
  [JFFS2] Self-sufficient #includes in jffs2_fs_i.h: include <linux/mutex.h>
  [MTD] [NAND] Verify probe by retrying to checking the results match
  [MTD] [NAND] S3C2410 Allow ECC disable to be specified by the board
  ...
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torvalds committed Apr 25, 2008
2 parents 5421d05 + 3887ed5 commit 7e97b28
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212 changes: 212 additions & 0 deletions Documentation/ABI/stable/sysfs-class-ubi
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What: /sys/class/ubi/
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
The ubi/ class sub-directory belongs to the UBI subsystem and
provides general UBI information, per-UBI device information
and per-UBI volume information.

What: /sys/class/ubi/version
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
This file contains version of the latest supported UBI on-media
format. Currently it is 1, and there is no plan to change this.
However, if in the future UBI needs on-flash format changes
which cannot be done in a compatible manner, a new format
version will be added. So this is a mechanism for possible
future backward-compatible (but forward-incompatible)
improvements.

What: /sys/class/ubiX/
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
The /sys/class/ubi0, /sys/class/ubi1, etc directories describe
UBI devices (UBI device 0, 1, etc). They contain general UBI
device information and per UBI volume information (each UBI
device may have many UBI volumes)

What: /sys/class/ubi/ubiX/avail_eraseblocks
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Amount of available logical eraseblock. For example, one may
create a new UBI volume which has this amount of logical
eraseblocks.

What: /sys/class/ubi/ubiX/bad_peb_count
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Count of bad physical eraseblocks on the underlying MTD device.

What: /sys/class/ubi/ubiX/bgt_enabled
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Contains ASCII "0\n" if the UBI background thread is disabled,
and ASCII "1\n" if it is enabled.

What: /sys/class/ubi/ubiX/dev
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Major and minor numbers of the character device corresponding
to this UBI device (in <major>:<minor> format).

What: /sys/class/ubi/ubiX/eraseblock_size
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Maximum logical eraseblock size this UBI device may provide. UBI
volumes may have smaller logical eraseblock size because of their
alignment.

What: /sys/class/ubi/ubiX/max_ec
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Maximum physical eraseblock erase counter value.

What: /sys/class/ubi/ubiX/max_vol_count
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Maximum number of volumes which this UBI device may have.

What: /sys/class/ubi/ubiX/min_io_size
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Minimum input/output unit size. All the I/O may only be done
in fractions of the contained number.

What: /sys/class/ubi/ubiX/mtd_num
Date: January 2008
KernelVersion: 2.6.25
Contact: Artem Bityutskiy <[email protected]>
Description:
Number of the underlying MTD device.

What: /sys/class/ubi/ubiX/reserved_for_bad
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Number of physical eraseblocks reserved for bad block handling.

What: /sys/class/ubi/ubiX/total_eraseblocks
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Total number of good (not marked as bad) physical eraseblocks on
the underlying MTD device.

What: /sys/class/ubi/ubiX/volumes_count
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Count of volumes on this UBI device.

What: /sys/class/ubi/ubiX/ubiX_Y/
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
The /sys/class/ubi/ubiX/ubiX_0/, /sys/class/ubi/ubiX/ubiX_1/,
etc directories describe UBI volumes on UBI device X (volumes
0, 1, etc).

What: /sys/class/ubi/ubiX/ubiX_Y/alignment
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Volume alignment - the value the logical eraseblock size of
this volume has to be aligned on. For example, 2048 means that
logical eraseblock size is multiple of 2048. In other words,
volume logical eraseblock size is UBI device logical eraseblock
size aligned to the alignment value.

What: /sys/class/ubi/ubiX/ubiX_Y/corrupted
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Contains ASCII "0\n" if the UBI volume is OK, and ASCII "1\n"
if it is corrupted (e.g., due to an interrupted volume update).

What: /sys/class/ubi/ubiX/ubiX_Y/data_bytes
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
The amount of data this volume contains. This value makes sense
only for static volumes, and for dynamic volume it equivalent
to the total volume size in bytes.

What: /sys/class/ubi/ubiX/ubiX_Y/dev
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Major and minor numbers of the character device corresponding
to this UBI volume (in <major>:<minor> format).

What: /sys/class/ubi/ubiX/ubiX_Y/name
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Volume name.

What: /sys/class/ubi/ubiX/ubiX_Y/reserved_ebs
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Count of physical eraseblock reserved for this volume.
Equivalent to the volume size in logical eraseblocks.

What: /sys/class/ubi/ubiX/ubiX_Y/type
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Volume type. Contains ASCII "dynamic\n" for dynamic volumes and
"static\n" for static volumes.

What: /sys/class/ubi/ubiX/ubiX_Y/upd_marker
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Contains ASCII "0\n" if the update marker is not set for this
volume, and "1\n" if it is set. The update marker is set when
volume update starts, and cleaned when it ends. So the presence
of the update marker indicates that the volume is being updated
at the moment of the update was interrupted. The later may be
checked using the "corrupted" sysfs file.

What: /sys/class/ubi/ubiX/ubiX_Y/usable_eb_size
Date: July 2006
KernelVersion: 2.6.22
Contact: Artem Bityutskiy <[email protected]>
Description:
Logical eraseblock size of this volume. Equivalent to logical
eraseblock size of the device aligned on the volume alignment
value.
30 changes: 30 additions & 0 deletions Documentation/arm/Samsung-S3C24XX/NAND.txt
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S3C24XX NAND Support
====================

Introduction
------------

Small Page NAND
---------------

The driver uses a 512 byte (1 page) ECC code for this setup. The
ECC code is not directly compatible with the default kernel ECC
code, so the driver enforces its own OOB layout and ECC parameters

Large Page NAND
---------------

The driver is capable of handling NAND flash with a 2KiB page
size, with support for hardware ECC generation and correction.

Unlike the 512byte page mode, the driver generates ECC data for
each 256 byte block in an 2KiB page. This means that more than
one error in a page can be rectified. It also means that the
OOB layout remains the default kernel layout for these flashes.


Document Author
---------------

Ben Dooks, Copyright 2007 Simtec Electronics

2 changes: 2 additions & 0 deletions Documentation/arm/Samsung-S3C24XX/Overview.txt
Original file line number Diff line number Diff line change
Expand Up @@ -156,6 +156,8 @@ NAND
controller. If there are any problems the latest linux-mtd
code can be found from http://www.linux-mtd.infradead.org/

For more information see Documentation/arm/Samsung-S3C24XX/NAND.txt


Serial
------
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6 changes: 6 additions & 0 deletions drivers/mtd/Kconfig
Original file line number Diff line number Diff line change
Expand Up @@ -158,6 +158,12 @@ config MTD_OF_PARTS
the partition map from the children of the flash node,
as described in Documentation/powerpc/booting-without-of.txt.

config MTD_AR7_PARTS
tristate "TI AR7 partitioning support"
depends on MTD_PARTITIONS
---help---
TI AR7 partitioning support

comment "User Modules And Translation Layers"

config MTD_CHAR
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1 change: 1 addition & 0 deletions drivers/mtd/Makefile
Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@ obj-$(CONFIG_MTD_CONCAT) += mtdconcat.o
obj-$(CONFIG_MTD_REDBOOT_PARTS) += redboot.o
obj-$(CONFIG_MTD_CMDLINE_PARTS) += cmdlinepart.o
obj-$(CONFIG_MTD_AFS_PARTS) += afs.o
obj-$(CONFIG_MTD_AR7_PARTS) += ar7part.o
obj-$(CONFIG_MTD_OF_PARTS) += ofpart.o

# 'Users' - code which presents functionality to userspace.
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