[U-Boot] [PATCH 19/19] fix: nand: pxa3xx: Add WA for eliminating flash ready timeout

[kostap at marvell.com]

From: David Sniatkiwicz <davidsn at marvell.com>

add delay before processing the status flags in pxa3xx_nand_irq().

Signed-off-by: David Sniatkiwicz <davidsn at marvell.com>
Reviewed-by: Igal Liberman <igall at marvell.com>
Reviewed-by: Kostya Porotchkin <kostap at marvell.com>
c: Stefan Roese <sr at denx.de>
Cc: Simon Glass <sjg at chromium.org>
---
 drivers/mtd/nand/pxa3xx_nand.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index b1bd430..05fd2df 100644
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -694,6 +694,9 @@ static irqreturn_t pxa3xx_nand_irq(struct pxa3xx_nand_info *info)
 		cmd_done        = NDSR_CS1_CMDD;
 	}
 
+	/* TODO - find out why we need the delay during write operation. */
+	ndelay(1);
+
 	status = nand_readl(info, NDSR);
 
 	if (status & NDSR_UNCORERR)
-- 
2.7.4