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authorDan Ehrenberg <dehrenberg@chromium.org>2015-04-03 01:15:10 +0300
committerBrian Norris <computersforpeace@gmail.com>2015-04-06 03:44:01 +0300
commit727dc612c46b8f3858537ea23805b3e897cf127e (patch)
tree5bcda420d5f0071fc8d8c8c02dc68166256323e7 /drivers/mtd/Kconfig
parent9cd5196ed25979a3760f97225aae3e17caf21512 (diff)
downloadlinux-727dc612c46b8f3858537ea23805b3e897cf127e.tar.xz
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/Kconfig13
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"