diff options
| author | Dan Ehrenberg <dehrenberg@chromium.org> | 2015-04-02 15:15:10 -0700 |
|---|---|---|
| committer | Brian Norris <computersforpeace@gmail.com> | 2015-04-05 17:44:01 -0700 |
| commit | 727dc612c46b8f3858537ea23805b3e897cf127e (patch) | |
| tree | 5bcda420d5f0071fc8d8c8c02dc68166256323e7 /drivers/mtd/Kconfig | |
| parent | 9cd5196ed25979a3760f97225aae3e17caf21512 (diff) | |
| download | linux-727dc612c46b8f3858537ea23805b3e897cf127e.tar.bz2 | |
mtd: part: Create the master device node when partitioned
For many use cases, it helps to have a device node for the entire
MTD device as well as device nodes for the individual partitions.
For example, this allows querying the entire device's properties.
A common idiom is to create an additional partition which spans
over the whole device.
This patch makes a config option, CONFIG_MTD_PARTITIONED_MASTER,
which makes the master partition present even when the device is
partitioned. This isn't turned on by default since it presents
a backwards-incompatible device numbering.
The patch also makes the parent of a partition device be the master,
if the config flag is set, now that the master is a full device.
Signed-off-by: Dan Ehrenberg <dehrenberg@chromium.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd/Kconfig')
| -rw-r--r-- | drivers/mtd/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/mtd/Kconfig b/drivers/mtd/Kconfig index 71fea895ce38..a03ad2951c7b 100644 --- a/drivers/mtd/Kconfig +++ b/drivers/mtd/Kconfig @@ -309,6 +309,19 @@ config MTD_SWAP The driver provides wear leveling by storing erase counter into the OOB. +config MTD_PARTITIONED_MASTER + bool "Retain master device when partitioned" + default n + depends on MTD + help + For historical reasons, by default, either a master is present or + several partitions are present, but not both. The concern was that + data listed in multiple partitions was dangerous; however, SCSI does + this and it is frequently useful for applications. This config option + leaves the master in even if the device is partitioned. It also makes + the parent of the partition device be the master device, rather than + what lies behind the master. + source "drivers/mtd/chips/Kconfig" source "drivers/mtd/maps/Kconfig" |