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authorIngo Molnar <mingo@elte.hu>2009-09-07 08:19:51 +0200
committerIngo Molnar <mingo@elte.hu>2009-09-07 08:19:51 +0200
commita1922ed661ab2c1637d0b10cde933bd9cd33d965 (patch)
tree0f1777542b385ebefd30b3586d830fd8ed6fda5b /Documentation/ABI/testing/sysfs-class-mtd
parent75e33751ca8bbb72dd6f1a74d2810ddc8cbe4bdf (diff)
parentd28daf923ac5e4a0d7cecebae56f3e339189366b (diff)
Merge branch 'tracing/core' into tracing/hw-breakpoints
Conflicts: arch/Kconfig kernel/trace/trace.h Merge reason: resolve the conflicts, plus adopt to the new ring-buffer APIs. Signed-off-by: Ingo Molnar <mingo@elte.hu>
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+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.