[U-Boot] [PATCH 2/8] Blackfin: nand: flush peripheral before polling it

[Mike Frysinger]

From: Graf Yang <graf.yang at analog.com>

We need to make sure the data written to the nand flash controller makes
it there before we start polling its status register.  Otherwise, we may
get stale data and return before the controller is actually ready.

Signed-off-by: Graf Yang <graf.yang at analog.com>
Signed-off-by: Mike Frysinger <vapier at gentoo.org>
---
 drivers/mtd/nand/bfin_nand.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/drivers/mtd/nand/bfin_nand.c b/drivers/mtd/nand/bfin_nand.c
index f6a0835..f134ef1 100644
--- a/drivers/mtd/nand/bfin_nand.c
+++ b/drivers/mtd/nand/bfin_nand.c
@@ -98,6 +98,7 @@ static void bfin_nfc_read_buf(struct mtd_info *mtd, uint8_t *buf, int len)
 
 		/* Contents do not matter */
 		bfin_write_NFC_DATA_RD(0x0000);
+		SSYNC();
 
 		while (!(bfin_read_NFC_IRQSTAT() & RD_RDY))
 			if (ctrlc())
-- 
1.6.2.2