diff mbox series

[v5,07/21] mtd: rawnand: Create a new enumeration to describe OOB placement

Message ID 20200514171651.24851-8-miquel.raynal@bootlin.com (mailing list archive)
State New, archived
Headers show
Series Prepare the introduction of generic ECC engines | expand

Commit Message

Miquel Raynal May 14, 2020, 5:16 p.m. UTC 
There is currently a confusion between the ECC type/mode/provider
(eg. hardware, software, on-die or none) and the ECC bytes placement.

Create a new enumeration to describe this placement.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
 drivers/mtd/nand/raw/nand_base.c |  4 ++++
 include/linux/mtd/rawnand.h      | 12 ++++++++++++
 2 files changed, 16 insertions(+)
diff mbox series

Patch

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index c407fd15ad46..b84fb5e6ecbe 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4967,6 +4967,10 @@  static const char * const nand_ecc_modes[] = {
 	[NAND_ECC_ON_DIE]	= "on-die",
 };
 
+static const char * const nand_ecc_placement[] = {
+	[NAND_ECC_PLACEMENT_INTERLEAVED] = "interleaved",
+};
+
 static int of_get_nand_ecc_mode(struct device_node *np)
 {
 	const char *pm;
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 4e0c75b1abc2..dc1b38fccfcf 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -92,6 +92,18 @@  enum nand_ecc_mode {
 	NAND_ECC_ON_DIE,
 };
 
+/**
+ * enum nand_ecc_placement - NAND ECC placement
+ * @NAND_ECC_PLACEMENT_FREE: The driver can decide where to put ECC bytes.
+ *                           Default behavior is to put them at the end of the
+ *                           OOB area.
+ * @NAND_ECC_PLACEMENT_INTERLEAVED: Syndrome layout: interleave data and OOB.
+ */
+enum nand_ecc_placement {
+	NAND_ECC_PLACEMENT_FREE,
+	NAND_ECC_PLACEMENT_INTERLEAVED,
+};
+
 enum nand_ecc_algo {
 	NAND_ECC_UNKNOWN,
 	NAND_ECC_HAMMING,