I am using an sam5d35 and its pmecc nand ecc controller.

In barebox, using similar atmel_nand.c the system crashes.

The problem was a call to chip->ecc.hwctl from nand_write_subpage_hwecc
(nand_base.c) when we write a sub page.

chip->ecc.hwctl function is not set when we are using PMECC controller.

As a workaround, i set NAND_NO_SUBPAGE_WRITE for PMECC controller in
order to disable sub page access in nand_write_page.

I think we can have the same problem in Linux. I do not performed
subpage nand writes from Linux but i made the following patch according
to my Barebox defect.

Signed-off-by: Herve Codina <Herve.CODINA@celad.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>