Commit f22d5f63 authored Mar 15, 2013 by Huang Shijie Committed by David Woodhouse Apr 05, 2013

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>

parent bd247acb

include/linux/mtd/nand.h

+4 −0

Original line number	Original line	Diff line number	Diff line
	@@ -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;
	};		};

	/**		/**