From: David Sniatkiwicz <davidsn@marvell.com>
Date: Wed, 29 Aug 2018 08:56:18 +0000 (+0300)
Subject: fix: nand: pxa3xx: Add WA for eliminating flash ready timeout
X-Git-Tag: v2018.11-rc1~114^2~5
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=e76afd84095a10e7cd9d8ee6b74ed94941e5f4f8;p=oweals%2Fu-boot.git

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 3323557999..2a02a9d58e 100644
--- 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)