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UPSTREAM: mtd: nand: fsl_ifc: Fix nand waitfunc return value 

As per the IFC hardware manual, Most significant byte in nand_fsr
register is the outcome of NAND READ STATUS command.

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

Change-Id: I0cb0278f83f3ea6d3768660dcb3e169e47fcbdd1
Signed-off-by: Jagdish Gediya <jagdish.gediya@nxp.com>
Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
Signed-off-by: Jon Lin <jon.lin@rock-chips.com>
(cherry picked from commit e8c669a3e6ec9b33aea55e957024f97300b99c1c)
This commit is contained in:
Jagdish Gediya 2018-05-02 01:20:57 +05:30 committed by Kever Yang
parent 10be2ce2a7
commit ff9ab0b1b2
1 changed files with 3 additions and 2 deletions
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5
drivers/mtd/nand/fsl_ifc_nand.c
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@ -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,