linux-dev/Documentation/ABI/testing/sysfs-class-mtd, branch master

mtd: Add sysfs attribute for mtd OOB available size

2018-04-22T18:07:06Z

Expose mtd OOB available size by sysfs file. Then users can get available OOB size by accessing /sys/class/mtd/mtdX/oobavail. Signed-off-by: Xiaolei Li Signed-off-by: Boris Brezillon

Documentation: ABI: mtd: describe "offset" more precisely

2017-07-13T17:54:45Z

So far Linux supported only two levels of MTD devices so we didn't need a very precise description for this sysfs file. With commit 97519dc52b44a ("mtd: partitions: add support for subpartitions") there is support for a tree structure so we should have more precise description. Using "parent" and "flash device" makes it more accurate. Signed-off-by: Rafał Miłecki Signed-off-by: Brian Norris

mtd: part: Add sysfs variable for offset of partition

2015-04-06T00:44:02Z

This patch makes a sysfs variable called 'offset' on each partition which contains the offset in bytes from the beginning of the master device that the partition starts. Signed-off-by: Dan Ehrenberg Signed-off-by: Brian Norris

mtd: Add sysfs attributes to expose the ECC stats fields

2014-07-09T01:37:26Z

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 Tested-by: Pekon Gupta Signed-off-by: Brian Norris

mtd: add MTD_MLCNANDFLASH case for mtd_type_show()

2013-10-27T23:27:06Z

The current mtd_type_show() misses the MTD_MLCNANDFLASH case. This patch adds the case for it, and also updates the ABI. Signed-off-by: Huang Shijie Signed-off-by: Brian Norris

mtd: update the ABI document about the ecc step size

2013-08-30T20:38:45Z

We add a new sys node for ecc step size. So update the ABI document about it. Signed-off-by: Huang Shijie Signed-off-by: Artem Bityutskiy [Brian: edited description, modified 'ecc_strength'] Signed-off-by: Brian Norris Signed-off-by: David Woodhouse

Documentation: mtd: amend the sysfs docs after mtdchar merge

2013-04-05T12:19:09Z

The mtdchar module was merged with the mtdcore module, which means that the MTD_CHAR Kconfig symbol does not exist any more. Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse

mtd: ABI documentation: clarification of bitflip_threshold

2012-07-06T14:10:06Z

The -EUCLEAN return value applies to mtd_read_oob() as well as mtd_read(), but only mtd_read() was mentioned in the blurd on bitflip_threshold in the ABI documentation. Signed-off-by: Mike Dunn Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse

mtd: driver _read() returns max_bitflips; mtd_read() returns -EUCLEAN

2012-05-14T04:14:23Z

The drivers' _read() method, absent an error, returns a non-negative integer indicating the maximum number of bit errors that were corrected in any one region comprising an ecc step. MTD returns -EUCLEAN if this is >= bitflip_threshold, 0 otherwise. If bitflip_threshold is zero, the comparison is not made since these devices lack ECC and always return zero in the non-error case (thanks Brian)¹. Note that this is a subtle change to the driver interface. This and the preceding patches in this set were tested with ubi on top of the nandsim and docg4 devices, running the ubi test io_basic from mtd-utils. ¹ http://lists.infradead.org/pipermail/linux-mtd/2012-March/040468.html Signed-off-by: Mike Dunn Acked-by: Robert Jarzmik Acked-by: Brian Norris Ivan Djelic Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse

mtd: bitflip_threshold added to mtd_info and sysfs

2012-05-14T04:11:39Z

An element 'bitflip_threshold' is added to struct mtd_info, and also exposed as a read/write variable in sysfs. This will be used to determine whether or not mtd_read() returns -EUCLEAN or 0 (absent a hard error). If the driver leaves it as zero, mtd will set it to a default value of ecc_strength. This v2 adds the line that propagates bitflip_threshold from the master to the partitions - thanks Ivan¹. ¹ http://lists.infradead.org/pipermail/linux-mtd/2012-April/040900.html Signed-off-by: Mike Dunn Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse