[PATCH v3 12/12] mtd: spinand: micron: Enable micron flashes with multi-die

[Shivamurthy Shastri (sshivamurthy)]

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

Signed-off-by: Shivamurthy Shastri <sshivamur...@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