[U-Boot] [PATCH][v2] mtd: nand: fsl_ifc: Fix nand waitfunc return value

[Jagdish Gediya]

As per the IFC hardware manual, Most significant 2 bytes in
nand_fsr register are the outcome of NAND READ STATUS command.

So status value need to be shifted and aligned as per the nand
framework requirement.

Signed-off-by: Jagdish Gediya <jagdish.gediya at nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha at nxp.com>
---
Changes for v2:
	- Change the waitfunc return value according to semantic
	  enforced by framework.

 drivers/mtd/nand/fsl_ifc_nand.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c
index 6eb44c3..7f487e7 100644
--- a/drivers/mtd/nand/fsl_ifc_nand.c
+++ b/drivers/mtd/nand/fsl_ifc_nand.c
@@ -701,6 +701,7 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip)
 	struct fsl_ifc_ctrl *ctrl = priv->ctrl;
 	struct fsl_ifc_runtime *ifc = ctrl->regs.rregs;
 	u32 nand_fsr;
+	int status;
 
 	if (ctrl->status != IFC_NAND_EVTER_STAT_OPC)
 		return NAND_STATUS_FAIL;
@@ -721,10 +722,10 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip)
 		return NAND_STATUS_FAIL;
 
 	nand_fsr = ifc_in32(&ifc->ifc_nand.nand_fsr);
+	status = nand_fsr >> 24;
 
 	/* Chip sometimes reporting write protect even when it's not */
-	nand_fsr = nand_fsr | NAND_STATUS_WP;
-	return nand_fsr;
+	return status | NAND_STATUS_WP;
 }
 
 static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
-- 
1.9.1