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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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