mtd: add ecc_strength fields to mtd structs

This adds 'ecc_strength' to struct mtd_info.  This stores the maximum number of
bit errors that can be corrected in one writesize region.

For consistency with the nand code, 'strength' is similiarly added to struct
nand_ecc_ctrl.  This stores the maximum number of bit errors that can be
corrected in one ecc step.

Signed-off-by: Mike Dunn <mikedunn@newsguy.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

2 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 726c2d1b2589..cf5ea8cdcf8e 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -164,6 +164,9 @@ struct mtd_info {
         /* ECC layout structure pointer - read only! */
         struct nand_ecclayout *ecclayout;
 
+        /* max number of correctible bit errors per writesize */
+        unsigned int ecc_strength;
+
         /* Data for variable erase regions. If numeraseregions is zero,
          * it means that the whole device has erasesize as given above.
          */
diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 609868f3db42..1482340d3d9f 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -324,6 +324,7 @@ struct nand_hw_control {
  * @steps:      number of ECC steps per page
  * @size:       data bytes per ECC step
  * @bytes:      ECC bytes per step
+ * @strength:   max number of correctible bits per ECC step
  * @total:      total number of ECC bytes per page
  * @prepad:     padding information for syndrome based ECC generators
  * @postpad:    padding information for syndrome based ECC generators
@@ -351,6 +352,7 @@ struct nand_ecc_ctrl {
         int size;
         int bytes;
         int total;
+        int strength;
         int prepad;
         int postpad;
         struct nand_ecclayout   *layout;