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authorPekon Gupta <pekon@ti.com>2013-10-24 18:20:26 +0530
committerBrian Norris <computersforpeace@gmail.com>2013-11-06 23:33:11 -0800
commit90c9c955db75f4f85db1f6b4fe17fbc3bcd513b3 (patch)
tree968b9b6c8cda4af911ea783005fa9f9ac402ad33 /drivers/mtd
parent70ba6d71ddcde8aa5a6e2b7f616e77b4bb96b984 (diff)
downloadlinux-90c9c955db75f4f85db1f6b4fe17fbc3bcd513b3.tar.bz2
mtd: nand: omap: remove selection of BCH ecc-scheme via KConfig
With OMAP NAND driver updates, selection of ecc-scheme: *DT enabled kernel* depends on ti,nand-ecc-opt and ti,elm-id DT bindings. *Non DT enabled kernel* depends on elm_dev and ecc-scheme passed along with platform-data from board file. So, selection of ecc-scheme (BCH8 or BCH4) from KConfig can be removed Signed-off-by: Pekon Gupta <pekon@ti.com> Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/Kconfig40
1 files changed, 6 insertions, 34 deletions
diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig
index d88529841d3f..93ae6a6d94f7 100644
--- a/drivers/mtd/nand/Kconfig
+++ b/drivers/mtd/nand/Kconfig
@@ -96,43 +96,15 @@ config MTD_NAND_OMAP2
config MTD_NAND_OMAP_BCH
depends on MTD_NAND && MTD_NAND_OMAP2 && ARCH_OMAP3
- tristate "Enable support for hardware BCH error correction"
+ tristate "Support hardware based BCH error correction"
default n
select BCH
- select BCH_CONST_PARAMS
help
- Support for hardware BCH error correction.
-
-choice
- prompt "BCH error correction capability"
- depends on MTD_NAND_OMAP_BCH
-
-config MTD_NAND_OMAP_BCH8
- bool "8 bits / 512 bytes (recommended)"
- help
- Support correcting up to 8 bitflips per 512-byte block.
- This will use 13 bytes of spare area per 512 bytes of page data.
- This is the recommended mode, as 4-bit mode does not work
- on some OMAP3 revisions, due to a hardware bug.
-
-config MTD_NAND_OMAP_BCH4
- bool "4 bits / 512 bytes"
- help
- Support correcting up to 4 bitflips per 512-byte block.
- This will use 7 bytes of spare area per 512 bytes of page data.
- Note that this mode does not work on some OMAP3 revisions, due to a
- hardware bug. Please check your OMAP datasheet before selecting this
- mode.
-
-endchoice
-
-if MTD_NAND_OMAP_BCH
-config BCH_CONST_M
- default 13
-config BCH_CONST_T
- default 4 if MTD_NAND_OMAP_BCH4
- default 8 if MTD_NAND_OMAP_BCH8
-endif
+ This config enables the ELM hardware engine, which can be used to
+ locate and correct errors when using BCH ECC scheme. This offloads
+ the cpu from doing ECC error searching and correction. However some
+ legacy OMAP families like OMAP2xxx, OMAP3xxx do not have ELM engine
+ so they should not enable this config symbol.
config MTD_NAND_IDS
tristate