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mtd: Blackfin NFC: wait for the ECC reset to finish 

When resetting the ECC registers/counters, the bit will automatically
clear itself once the reset has actually finished.  So make sure we
wait for that to occur before doing anything else rather than assuming
everything is peachy and proceeding with stale ECC values.

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Barry Song 2010-08-05 11:07:41 -04:00 committed by David Woodhouse
parent 00355b0baa
commit 752b957a37
1 changed files with 2 additions and 0 deletions
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2
drivers/mtd/nand/bf5xx_nand.c
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@ -507,6 +507,8 @@ static void bf5xx_nand_dma_rw(struct mtd_info *mtd,
*/
bfin_write_NFC_RST(ECC_RST);
SSYNC();
while (bfin_read_NFC_RST() & ECC_RST)
cpu_relax();
disable_dma(CH_NFC);
clear_dma_irqstat(CH_NFC);