fix: nand: pxa3xx: Add WA for eliminating flash ready timeout

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

Signed-off-by: David Sniatkiwicz <davidsn@marvell.com>
Reviewed-by: Igal Liberman <igall@marvell.com>
Reviewed-by: Kostya Porotchkin <kostap@marvell.com>
c: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Stefan Roese <sr@denx.de>

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 3323557..2a02a9d 100644 (file)
--- a/drivers/mtd/nand/pxa3xx_nand.c
+++ b/drivers/mtd/nand/pxa3xx_nand.c
@@ -668,6 +668,9 @@ 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)