[v7,02/20] mtd: rawnand: Create a new enumeration to describe ECC bytes placement
diff mbox series

Message ID 20200529002517.3546-3-miquel.raynal@bootlin.com
State New
Headers show
Series
  • Introduce the generic ECC engine abstraction
Related show

Commit Message

Miquel Raynal May 29, 2020, 12:24 a.m. UTC
There is currently a confusion between the ECC type/mode/provider
(eg. on-host, 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 |  5 +++++
 include/linux/mtd/rawnand.h      | 14 ++++++++++++++
 2 files changed, 19 insertions(+)

Patch
diff mbox series

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index bd3f5a875e39..4d2d444f9db9 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -5018,6 +5018,11 @@  static const char * const nand_ecc_modes[] = {
 	[NAND_ECC_ON_DIE]	= "on-die",
 };
 
+static const char * const nand_ecc_placement[] = {
+	[NAND_ECC_PLACEMENT_OOB] = "oob",
+	[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 65b1c1c18b41..5e014807e050 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -92,6 +92,20 @@  enum nand_ecc_mode {
 	NAND_ECC_ON_DIE,
 };
 
+/**
+ * enum nand_ecc_placement - NAND ECC bytes placement
+ * @NAND_ECC_PLACEMENT_UNKNOWN: The actual position of the ECC bytes is unknown
+ * @NAND_ECC_PLACEMENT_OOB: The ECC bytes are located in the OOB area
+ * @NAND_ECC_PLACEMENT_INTERLEAVED: Syndrome layout, there are ECC bytes
+ *                                  interleaved with regular data in the main
+ *                                  area
+ */
+enum nand_ecc_placement {
+	NAND_ECC_PLACEMENT_UNKNOWN,
+	NAND_ECC_PLACEMENT_OOB,
+	NAND_ECC_PLACEMENT_INTERLEAVED,
+};
+
 enum nand_ecc_algo {
 	NAND_ECC_UNKNOWN,
 	NAND_ECC_HAMMING,