mtd: nand: atmel: Avoid ECC errors when leaving backup mode

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During backup mode, the contents of all registers will be cleared as the
SoC will be completely powered down. For a product that boots on NAND
Flash memory, the bootloader will obviously use the related controller
to read the Flash and correct any detected error in the memory, before
handling back control to the kernel's resuming entry point.

But it does not clean the NAND controller registers after use and on its
side the kernel driver expects the error locator to be powered down and
in a clean state. Add a resume hook for the PMECC error locator, and
reset its registers.

Signed-off-by: Romain Izard <romain.izard.pro@gmail.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>

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Romain Izard 2017-09-28 11:46:23 +02:00 • committed by Boris Brezillon

parent 8d6b6d7e13

commit 143b0ab97d

3 changed files with 13 additions and 8 deletions

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3

drivers/mtd/nand/atmel/nand-controller.c

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17

drivers/mtd/nand/atmel/pmecc.c

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1

drivers/mtd/nand/atmel/pmecc.h

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