[PATCH V3 6/9] mtd: add a new field for ecc info in the nand_flash_dev{}

Huang Shijie
2013-04-23T09:07:48Z

Add the @ecc_info in the nand_flash_dev{}.
The lower 16 bits are used to store the ECC bits, while the upper 16 bits
are used to store the ECC data chunk size.

Signed-off-by: Huang Shijie <b32955@freescale.com>
---
include/linux/mtd/nand.h | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
index 063e517..f4c7777 100644
--- a/include/linux/mtd/nand.h
+++ b/include/linux/mtd/nand.h
@@ -624,6 +624,10 @@ struct nand_chip {
{ .name = (nm), {{ .dev_id = (devid) }}, .chipsize = (chipsz), \
.options = (opts) }

+#define NAND_ECC_INFO(strength, size) (((strength) << 16) | (size))
+#define NAND_ECC_STRENGTH(x) (((x) >> 16) & 0xffff)
+#define NAND_ECC_SIZE(x) ((x) & 0xffff)
+
/**
* struct nand_flash_dev - NAND Flash Device ID Structure
* @name: a human-readable name of the NAND chip
@@ -641,6 +645,11 @@ struct nand_chip {
* @options: stores various chip bit options
* @id_len: The valid length of the @id.
* @oobsize: OOB size
+ * @ecc_info: The ECC information.
+ * lower 16 bits: store the ECC bits.
+ * upper 16 bits: store the ECC data chunk size.
+ * For example, the "4bit ECC for each 512Byte" can be set with
+ * NAND_ECC_INFO(4, 512) macro.
*/
struct nand_flash_dev {
char *name;
@@ -657,6 +666,7 @@ struct nand_flash_dev {
unsigned int options;
uint16_t id_len;
uint16_t oobsize;
+ uint32_t ecc_info;
};

/**
--
1.7.1