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mtd: nand: fsl_ifc: Fix nand waitfunc return value

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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.

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>
This commit is contained in:
Jagdish Gediya 2018-05-02 01:20:57 +05:30 • committed by York Sun
parent 8b40f22900
commit e8c669a3e6
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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@ -700,6 +700,7 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip)
struct fsl_ifc_ctrl *ctrl = priv->ctrl; struct fsl_ifc_ctrl *ctrl = priv->ctrl;
struct fsl_ifc_runtime *ifc = ctrl->regs.rregs; struct fsl_ifc_runtime *ifc = ctrl->regs.rregs;
u32 nand_fsr; u32 nand_fsr;
int status;
if (ctrl->status != IFC_NAND_EVTER_STAT_OPC) if (ctrl->status != IFC_NAND_EVTER_STAT_OPC)
return NAND_STATUS_FAIL; return NAND_STATUS_FAIL;
@ -720,10 +721,10 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip)
return NAND_STATUS_FAIL; return NAND_STATUS_FAIL;
nand_fsr = ifc_in32(&ifc->ifc_nand.nand_fsr); nand_fsr = ifc_in32(&ifc->ifc_nand.nand_fsr);
status = nand_fsr >> 24;
/* Chip sometimes reporting write protect even when it's not */ /* Chip sometimes reporting write protect even when it's not */
nand_fsr = nand_fsr | NAND_STATUS_WP; return status | NAND_STATUS_WP;
return nand_fsr;
} }
static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip, static int fsl_ifc_read_page(struct mtd_info *mtd, struct nand_chip *chip,