mtd: add ecc_strength fields to mtd structs

[Linux-MTD Mailing List]

Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=1d0b95b0834087ba3653f69c24483d63a26d51a7
Commit:     1d0b95b0834087ba3653f69c24483d63a26d51a7
Parent:     d107bc34f4953852834f086968fc7963125d6943
Author:     Mike Dunn <mikedunn at newsguy.com>
AuthorDate: Sun Mar 11 14:21:10 2012 -0700
Committer:  David Woodhouse <David.Woodhouse at intel.com>
CommitDate: Tue Mar 27 00:56:36 2012 +0100

    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 at newsguy.com>
    Signed-off-by: Artem Bityutskiy <artem.bityutskiy at linux.intel.com>
    Signed-off-by: David Woodhouse <David.Woodhouse at intel.com>
---
 include/linux/mtd/mtd.h  |    3 +++
 include/linux/mtd/nand.h |    2 ++
 2 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index 726c2d1..cf5ea8c 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 609868f..1482340 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;