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    Subject[PATCH 8/8] mtd: spinand: micron: Enable micron flashes with multi-die
    Date
    From: Shivamurthy Shastri <sshivamurthy@micron.com>

    Some of the Micron flashes has multi-die, and need to select the die
    each time while accessing it.

    Signed-off-by: Shivamurthy Shastri <sshivamurthy@micron.com>
    ---
    drivers/mtd/nand/spi/micron.c | 14 ++++++++++++++
    1 file changed, 14 insertions(+)

    diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c
    index 1e28ea3d1362..fa2b43caf39d 100644
    --- a/drivers/mtd/nand/spi/micron.c
    +++ b/drivers/mtd/nand/spi/micron.c
    @@ -90,6 +90,19 @@ static int micron_ecc_get_status(struct spinand_device *spinand,
    return -EINVAL;
    }

    +static int micron_select_target(struct spinand_device *spinand,
    + unsigned int target)
    +{
    + struct spi_mem_op op = SPINAND_SET_FEATURE_OP(0xd0,
    + spinand->scratchbuf);
    +
    + if (target == 1)
    + target = 0x40;
    +
    + *spinand->scratchbuf = target;
    + return spi_mem_exec_op(spinand->spimem, &op);
    +}
    +
    static int micron_spinand_detect(struct spinand_device *spinand)
    {
    const struct spi_mem_op *op;
    @@ -105,6 +118,7 @@ static int micron_spinand_detect(struct spinand_device *spinand)
    spinand->flags = 0;
    spinand->eccinfo.get_status = micron_ecc_get_status;
    spinand->eccinfo.ooblayout = &micron_ooblayout_ops;
    + spinand->select_target = micron_select_target;

    op = spinand_select_op_variant(spinand,
    &read_cache_variants);
    --
    2.17.1
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