Commit 77f5492c authored by Richard Genoud's avatar Richard Genoud Committed by David Woodhouse

[MTD] [NAND] Hardware ECC controller on at91sam9263 / at91sam9260

This is a patch to use the hardware ECC controller of
the AT91SAM9260 and AT91SAM9263 for the AT91 nand.
On AT91 NAND, there's now a choice between ECC soft,
ECC hard or no ECC (for debug).

It has been tested on AT91SAM9263 with 8 bits large
and small page NAND.
Signed-off-by: default avatarRichard Genoud <richard.genoud@gmail.com>
Signed-off-by: default avatarDavid Woodhouse <dwmw2@infradead.org>
parent 2c61cb25
......@@ -278,6 +278,47 @@ config MTD_NAND_AT91
help
Enables support for NAND Flash / Smart Media Card interface
on Atmel AT91 processors.
choice
prompt "ECC management for NAND Flash / SmartMedia on AT91"
depends on MTD_NAND_AT91
config MTD_NAND_AT91_ECC_HW
bool "Hardware ECC"
depends on ARCH_AT91SAM9263 || ARCH_AT91SAM9260
help
Uses hardware ECC provided by the at91sam9260/at91sam9263 chip
instead of software ECC.
The hardware ECC controller is capable of single bit error
correction and 2-bit random detection per page.
NB : hardware and software ECC schemes are incompatible.
If you switch from one to another, you'll have to erase your
mtd partition.
If unsure, say Y
config MTD_NAND_AT91_ECC_SOFT
bool "Software ECC"
help
Uses software ECC.
NB : hardware and software ECC schemes are incompatible.
If you switch from one to another, you'll have to erase your
mtd partition.
config MTD_NAND_AT91_ECC_NONE
bool "No ECC (testing only, DANGEROUS)"
depends on DEBUG_KERNEL
help
No ECC will be used.
It's not a good idea and it should be reserved for testing
purpose only.
If unsure, say N
endchoice
endchoice
config MTD_NAND_PXA3xx
bool "Support for NAND flash devices on PXA3xx"
......
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