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	Diff line number	Diff line
		@@ -588,6 +588,8 @@ struct nand_chip {
		* @chipsize: total chip size in MiB
		* @erasesize: eraseblock size in bytes (determined from the extended ID if 0)
		* @options: stores various chip bit options
		* @id_len: The valid length of the @id.
		* @oobsize: OOB size
		*/
		struct nand_flash_dev {
		char *name;
		@@ -602,6 +604,8 @@ struct nand_flash_dev {
		unsigned int chipsize;
		unsigned int erasesize;
		unsigned int options;
		uint16_t id_len;
		uint16_t oobsize;
		};

		/**

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