[PATCH] mtd: rawnand: fsl_ifc: Fix nand waitfunc return value
Boris Brezillon
boris.brezillon at bootlin.com
Mon Mar 19 04:08:13 PDT 2018
On Tue, 20 Mar 2018 03:35:12 +0530
Jagdish Gediya <jagdish.gediya at nxp.com> wrote:
> 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.
>
> Cc: stable at vger.kernel.org
Fixes tag please.
> Signed-off-by: Jagdish Gediya <jagdish.gediya at nxp.com>
> Reviewed-by: Prabhakar Kushwaha <prabhakar.kushwaha at nxp.com>
> ---
> 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 d9ce398..951dd89 100644
> --- a/drivers/mtd/nand/fsl_ifc_nand.c
> +++ b/drivers/mtd/nand/fsl_ifc_nand.c
> @@ -643,12 +643,13 @@ static int fsl_ifc_wait(struct mtd_info *mtd, struct nand_chip *chip)
> fsl_ifc_run_command(mtd);
>
> nand_fsr = ifc_in32(&ifc->ifc_nand.nand_fsr);
> -
> + nand_fsr >>= 16;
> + nand_fsr = (nand_fsr >> 8) | (nand_fsr << 8);
> /*
> * The chip always seems to report that it is
> * write-protected, even when it is not.
> */
> - return nand_fsr | NAND_STATUS_WP;
> + return (nand_fsr & 0xff) | NAND_STATUS_WP;
> }
>
> /*
--
Boris Brezillon, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com
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