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mtd: Add sysfs attributes to expose the ECC stats fields

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These new sysfs device attributes allow us to retrieve the ECC and bad
block stats by poking a sysfs file, which is often more convenient than
using the ioctl.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Pekon Gupta <pekon@ti.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Ezequiel Garcia
2014-06-24 10:55:50 -03:00
committed by Brian Norris
parent 89384f6462
commit 990a3af0c2
2 changed files with 83 additions and 0 deletions
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38
Documentation/ABI/testing/sysfs-class-mtd
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@@ -184,3 +184,41 @@ Description:
It will always be a non-negative integer. In the case of
devices lacking any ECC capability, it is 0.
What: /sys/class/mtd/mtdX/ecc_failures
Date: June 2014
KernelVersion: 3.17
Contact: linux-mtd@lists.infradead.org
Description:
The number of failures reported by this device's ECC. Typically,
these failures are associated with failed read operations.
It will always be a non-negative integer. In the case of
devices lacking any ECC capability, it is 0.
What: /sys/class/mtd/mtdX/corrected_bits
Date: June 2014
KernelVersion: 3.17
Contact: linux-mtd@lists.infradead.org
Description:
The number of bits that have been corrected by means of the
device's ECC.
It will always be a non-negative integer. In the case of
devices lacking any ECC capability, it is 0.
What: /sys/class/mtd/mtdX/bad_blocks
Date: June 2014
KernelVersion: 3.17
Contact: linux-mtd@lists.infradead.org
Description:
The number of blocks marked as bad, if any, in this partition.
What: /sys/class/mtd/mtdX/bbt_blocks
Date: June 2014
KernelVersion: 3.17
Contact: linux-mtd@lists.infradead.org
Description:
The number of blocks that are marked as reserved, if any, in
this partition. These are typically used to store the in-flash
bad block table (BBT).