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mtd: add new fields to nand_flash_dev{} 

As time goes on, we begin to meet the situation that we can not get enough
information from some nand chips's id data. Take some Toshiba's nand chips
for example. I have 4 Toshiba's nand chips in my hand:
	TC58NVG2S0F, TC58NVG3S0F, TC58NVG5D2, TC58NVG6D2

When we read these chips' datasheets, we will get the geometry of these chips:
	TC58NVG2S0F : 4096 + 224
	TC58NVG3S0F : 4096 + 232
	TC58NVG5D2  : 8192 + 640
	TC58NVG6D2  : 8192 + 640

But we can not parse out the correct oob size for these chips from the id data.

This patch adds some new fields to the nand_flash_dev{}:
  @id_len: the valid length of the id data. See the comments in
           nand_id_has_period()
  @oobsize: the oob size.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Reviewed-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Huang Shijie 2013-03-15 11:00:59 +08:00 committed by David Woodhouse
parent bd247acb77
commit f22d5f638b
1 changed files with 4 additions and 0 deletions
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4
include/linux/mtd/nand.h
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@ -588,6 +588,8 @@ struct nand_chip {
* @chipsize: total chip size in MiB * @chipsize: total chip size in MiB
* @erasesize: eraseblock size in bytes (determined from the extended ID if 0) * @erasesize: eraseblock size in bytes (determined from the extended ID if 0)
* @options: stores various chip bit options * @options: stores various chip bit options
* @id_len: The valid length of the @id.
* @oobsize: OOB size
*/ */
struct nand_flash_dev { struct nand_flash_dev {
char *name; char *name;
@ -602,6 +604,8 @@ struct nand_flash_dev {
unsigned int chipsize; unsigned int chipsize;
unsigned int erasesize; unsigned int erasesize;
unsigned int options; unsigned int options;
uint16_t id_len;
uint16_t oobsize;
}; };
/** /**