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mtd: nand: pxa3xx_nand: fix early spurious interrupt

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When the nand is first probe, and upon the first command start, the
status bits should be cleared before the interrupts are unmasked.

This commit is taken from Linux:
'commit 0b14392db2e'
("mtd: nand: pxa3xx_nand: fix early spurious interrupt")

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Signed-off-by: Ofer Heifetz <oferh@marvell.com>
Reviewed-by: Igal Liberman <igall@marvell.com>
Cc: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Ofer Heifetz 2018-08-29 11:56:03 +03:00 committed by Stefan Roese
parent d3859d1b53
commit 658999244a
1 changed files with 1 additions and 1 deletions
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2
drivers/mtd/nand/pxa3xx_nand.c
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@ -481,8 +481,8 @@ static void pxa3xx_nand_start(struct pxa3xx_nand_info *info)
ndcr |= NDCR_ND_RUN;
/* clear status bits and run */
nand_writel(info, NDCR, 0);
nand_writel(info, NDSR, NDSR_MASK);
nand_writel(info, NDCR, 0);
nand_writel(info, NDCR, ndcr);
}