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Subject[PATCH 7/8] mtd: spinand: micron: Fix read failure in Micron M70A flashes
Date
From: Shivamurthy Shastri <sshivamurthy@micron.com>

M70A series flashes by default enable continuous read feature (BIT0 in
configuration register). This feature will not expose the ECC to host
and causing read failure.

Signed-off-by: Shivamurthy Shastri <sshivamurthy@micron.com>
---
drivers/mtd/nand/spi/micron.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/drivers/mtd/nand/spi/micron.c b/drivers/mtd/nand/spi/micron.c
index 6fde93ec23a1..1e28ea3d1362 100644
--- a/drivers/mtd/nand/spi/micron.c
+++ b/drivers/mtd/nand/spi/micron.c
@@ -127,6 +127,15 @@ static int micron_spinand_detect(struct spinand_device *spinand)
return 1;
}

+static int micron_spinand_init(struct spinand_device *spinand)
+{
+ /*
+ * Some of the Micron flashes enable this BIT by default,
+ * and there is a chance of read failure due to this.
+ */
+ return spinand_upd_cfg(spinand, CFG_QUAD_ENABLE, 0);
+}
+
static void micron_fixup_param_page(struct spinand_device *spinand,
struct nand_onfi_params *p)
{
@@ -150,6 +159,7 @@ static void micron_fixup_param_page(struct spinand_device *spinand,

static const struct spinand_manufacturer_ops micron_spinand_manuf_ops = {
.detect = micron_spinand_detect,
+ .init = micron_spinand_init,
.fixup_param_page = micron_fixup_param_page,
};

--
2.17.1
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