19fe7f1a00
Signed-off-by: Kevin Cernekee <kpc.mtd@gmail.com> Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
126 lines
3.7 KiB
Plaintext
126 lines
3.7 KiB
Plaintext
What: /sys/class/mtd/
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
The mtd/ class subdirectory belongs to the MTD subsystem
|
|
(MTD core).
|
|
|
|
What: /sys/class/mtd/mtdX/
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
The /sys/class/mtd/mtd{0,1,2,3,...} directories correspond
|
|
to each /dev/mtdX character device. These may represent
|
|
physical/simulated flash devices, partitions on a flash
|
|
device, or concatenated flash devices. They exist regardless
|
|
of whether CONFIG_MTD_CHAR is actually enabled.
|
|
|
|
What: /sys/class/mtd/mtdXro/
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
These directories provide the corresponding read-only device
|
|
nodes for /sys/class/mtd/mtdX/ . They are only created
|
|
(for the benefit of udev) if CONFIG_MTD_CHAR is enabled.
|
|
|
|
What: /sys/class/mtd/mtdX/dev
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
Major and minor numbers of the character device corresponding
|
|
to this MTD device (in <major>:<minor> format). This is the
|
|
read-write device so <minor> will be even.
|
|
|
|
What: /sys/class/mtd/mtdXro/dev
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
Major and minor numbers of the character device corresponding
|
|
to the read-only variant of thie MTD device (in
|
|
<major>:<minor> format). In this case <minor> will be odd.
|
|
|
|
What: /sys/class/mtd/mtdX/erasesize
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
"Major" erase size for the device. If numeraseregions is
|
|
zero, this is the eraseblock size for the entire device.
|
|
Otherwise, the MEMGETREGIONCOUNT/MEMGETREGIONINFO ioctls
|
|
can be used to determine the actual eraseblock layout.
|
|
|
|
What: /sys/class/mtd/mtdX/flags
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
A hexadecimal value representing the device flags, ORed
|
|
together:
|
|
|
|
0x0400: MTD_WRITEABLE - device is writable
|
|
0x0800: MTD_BIT_WRITEABLE - single bits can be flipped
|
|
0x1000: MTD_NO_ERASE - no erase necessary
|
|
0x2000: MTD_POWERUP_LOCK - always locked after reset
|
|
|
|
What: /sys/class/mtd/mtdX/name
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
A human-readable ASCII name for the device or partition.
|
|
This will match the name in /proc/mtd .
|
|
|
|
What: /sys/class/mtd/mtdX/numeraseregions
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
For devices that have variable eraseblock sizes, this
|
|
provides the total number of erase regions. Otherwise,
|
|
it will read back as zero.
|
|
|
|
What: /sys/class/mtd/mtdX/oobsize
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
Number of OOB bytes per page.
|
|
|
|
What: /sys/class/mtd/mtdX/size
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
Total size of the device/partition, in bytes.
|
|
|
|
What: /sys/class/mtd/mtdX/type
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
One of the following ASCII strings, representing the device
|
|
type:
|
|
|
|
absent, ram, rom, nor, nand, dataflash, ubi, unknown
|
|
|
|
What: /sys/class/mtd/mtdX/writesize
|
|
Date: April 2009
|
|
KernelVersion: 2.6.29
|
|
Contact: linux-mtd@lists.infradead.org
|
|
Description:
|
|
Minimal writable flash unit size. This will always be
|
|
a positive integer.
|
|
|
|
In the case of NOR flash it is 1 (even though individual
|
|
bits can be cleared).
|
|
|
|
In the case of NAND flash it is one NAND page (or a
|
|
half page, or a quarter page).
|
|
|
|
In the case of ECC NOR, it is the ECC block size.
|