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[v4,09/21] mtd: rawnand: Create a new enumeration to describe properly ECC types

Message ID 20200117214151.20767-10-miquel.raynal@bootlin.com
State Changes Requested
Delegated to: Miquel Raynal
Headers show
Series Prepare the introduction of generic ECC engines | expand

Commit Message

Miquel Raynal Jan. 17, 2020, 9:41 p.m. UTC 
Now that the misleading mix between ECC engine type and OOB placement
has been addressed, add a new enumeration to properly define ECC types
(also called provider or mode).

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
---
 drivers/mtd/nand/raw/nand_base.c |  7 +++++++
 include/linux/mtd/rawnand.h      | 16 ++++++++++++++++
 2 files changed, 23 insertions(+)
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Patch

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 0fdc9d63f259..ddd886fb92c4 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -4775,6 +4775,13 @@  static const char * const nand_ecc_modes[] = {
 	[NAND_ECC_ON_DIE]	= "on-die",
 };
 
+static const char * const nand_ecc_engine_providers[] = {
+	[NAND_ECC_ENGINE_NONE] = "none",
+	[NAND_ECC_ENGINE_SOFT] = "soft",
+	[NAND_ECC_ENGINE_CONTROLLER] = "hw",
+	[NAND_ECC_ENGINE_ON_DIE] = "on-die",
+};
+
 static const char * const nand_ecc_placement[] = {
 	[NAND_ECC_PLACEMENT_INTERLEAVED] = "interleaved",
 };
diff --git a/include/linux/mtd/rawnand.h b/include/linux/mtd/rawnand.h
index 64de0015edbd..aeef31a68c7a 100644
--- a/include/linux/mtd/rawnand.h
+++ b/include/linux/mtd/rawnand.h
@@ -92,6 +92,22 @@  enum nand_ecc_mode {
 	NAND_ECC_ON_DIE,
 };
 
+/**
+ * enum nand_ecc_engine_type - NAND ECC engine type/provider
+ * @NAND_ECC_ENGINE_INVALID: Invalid value
+ * @NAND_ECC_ENGINE_NONE: No ECC correction
+ * @NAND_ECC_ENGINE_SOFT: Software ECC correction
+ * @NAND_ECC_ENGINE_CONTROLLER: Hardware controller ECC correction
+ * @NAND_ECC_ENGINE_ON_DIE: On chip hardware ECC correction
+ */
+enum nand_ecc_engine_type {
+	NAND_ECC_ENGINE_INVALID,
+	NAND_ECC_ENGINE_NONE,
+	NAND_ECC_ENGINE_SOFT,
+	NAND_ECC_ENGINE_CONTROLLER,
+	NAND_ECC_ENGINE_ON_DIE,
+};
+
 /**
  * enum nand_ecc_placement - NAND ECC placement
  * @NAND_ECC_PLACEMENT_FREE: The driver can decide where to put ECC bytes.