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 <[email protected]>
Reviewed-by: Igal Liberman <[email protected]>
Reviewed-by: Kostya Porotchkin <[email protected]>
c: Stefan Roese <[email protected]>
Cc: Simon Glass <[email protected]>
Signed-off-by: Stefan Roese <[email protected]>

diff --git a/drivers/mtd/nand/pxa3xx_nand.c b/drivers/mtd/nand/pxa3xx_nand.c
index 3323557999f352ee248b0779f89781aeca50ddd3..2a02a9d58efca4e3cccd7bb37f0295e2ff37dd7b 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)