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mtd: nand: atmel pmecc: disable subpage writes 

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>
This commit is contained in:
Herve Codina 2014-02-28 16:53:44 +01:00 committed by Sascha Hauer
parent 49d9b9bea7
commit ad22ad38ea
1 changed files with 1 additions and 0 deletions
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1
drivers/mtd/nand/atmel_nand.c
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@ -837,6 +837,7 @@ static int __init atmel_pmecc_nand_init_params(struct device_d *dev,
return err_no;
}
nand_chip->options |= NAND_NO_SUBPAGE_WRITE;
nand_chip->ecc.read_page = atmel_nand_pmecc_read_page;
nand_chip->ecc.write_page = atmel_nand_pmecc_write_page;