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    Subject[RFC PATCH v2 3/6] mtd: rawnand: micron: add fixup for ONFI revision
    Date
    Some Micron NAND chips (MT29F1G08ABAFAWP-ITE:F) report 00 00 for the
    revision number field of the ONFI parameter page. Rather than rejecting
    these outright assume ONFI version 1.0 if the revision number is 00 00.

    Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
    ---
    This is now qualified on vendor == MICRON. I haven't qualified this
    based on specific chips the ABAFA (id=d1) and ABBFA (id=a1) variants are
    documented to have this behaviour.

    Changes in v2:
    - use fixup_onfi_param_page

    drivers/mtd/nand/raw/nand_micron.c | 8 ++++++++
    1 file changed, 8 insertions(+)

    diff --git a/drivers/mtd/nand/raw/nand_micron.c b/drivers/mtd/nand/raw/nand_micron.c
    index 0af45b134c0c..e582c9e61715 100644
    --- a/drivers/mtd/nand/raw/nand_micron.c
    +++ b/drivers/mtd/nand/raw/nand_micron.c
    @@ -287,6 +287,14 @@ static int micron_nand_init(struct nand_chip *chip)
    return 0;
    }

    +static void micron_fixup_onfi_param_page(struct nand_chip *chip,
    + struct nand_onfi_params *p)
    +{
    + if (le16_to_cpu(p->revision) == 0)
    + p->revision = cpu_to_le16(1 << 1);
    +}
    +
    const struct nand_manufacturer_ops micron_nand_manuf_ops = {
    .init = micron_nand_init,
    + .fixup_onfi_param_page = micron_fixup_onfi_param_page,
    };
    --
    2.17.1
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