[PATCH V2 1/4] mtd: nand: add new enum for storing ECC algorithm

Rafał Miłecki
2016-03-23T10:19:46Z

Our nand_ecc_modes_t is already a bit abused by value NAND_ECC_SOFT_BCH.
This enum should store ECC mode only and putting algorithm details there
is a bad idea. It would result in too many values impossible to support
in a sane way.

To solve this problem let's add a new enum. We'll have to modify all
drivers to set it properly but once it's done it'll be possible to drop
NAND_ECC_SOFT_BCH. That will result in a cleaner design and more
possibilities like setting ECC algorithm for hardware ECC mode.

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
---
include/linux/mtd/nand.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 7604f4b..b818eb3 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -119,6 +119,12 @@ typedef enum {
NAND_ECC_SOFT_BCH,
} nand_ecc_modes_t;

+enum nand_ecc_algo {
+ NAND_ECC_UNKNOWN,
+ NAND_ECC_HAMMING,
+ NAND_ECC_BCH,
+};
+
/*
* Constants for Hardware ECC
*/
@@ -508,6 +514,7 @@ struct nand_hw_control {
*/
struct nand_ecc_ctrl {
nand_ecc_modes_t mode;
+ enum nand_ecc_algo algo;
int steps;
int size;
int bytes;
--
1.8.4.5