[PATCH V4 6/9] mtd: add ECC info for nand_flash_dev{}

Huang Shijie
2013-04-26T09:21:06Z

Add an instance of an anonymous struct to store the ECC infor for full id
nand chips.
@ecc.strength: ECC correctability from the datasheet.
@ecc.size: ECC size required by the @ecc.strength,

Also add the necessary macros to make the code simple and clean.

Signed-off-by: Huang Shijie <b32955@freescale.com>
---
include/linux/mtd/nand.h | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 9b28739..5f1c0d1 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -625,6 +625,11 @@ struct nand_chip {
{ .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \
.options = (opts) }

+#define NAND_ECC_INFO(_strength, _size) \
+ { .strength = (_strength), .size = (_size) }
+#define NAND_ECC_STRENGTH(type) ((type)->ecc.strength)
+#define NAND_ECC_SIZE(type) ((type)->ecc.size)
+
/**
* struct nand_flash_dev - NAND Flash Device ID Structure
* @name: a human-readable name of the NAND chip
@@ -642,6 +647,12 @@ struct nand_chip {
* @options: stores various chip bit options
* @id_len: The valid length of the @id.
* @oobsize: OOB size
+ * @ecc.strength: The ECC correctability from the datasheet, same as the
+ * @ecc_strength in nand_chip{}.
+ * @ecc.size: The ECC size required by the @ecc.strength, same as the
+ * @ecc_size in nand_chip{}.
+ * For example, the "4bit ECC for each 512Byte" can be set with
+ * NAND_ECC_INFO(4, 512).
*/
struct nand_flash_dev {
char *name;
@@ -658,6 +669,10 @@ struct nand_flash_dev {
unsigned int options;
uint16_t id_len;
uint16_t oobsize;
+ struct {
+ uint16_t strength;
+ uint16_t size;
+ } ecc;
};

/**
--
1.7.1