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Commit 453281a9 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by David Woodhouse
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mtd: nand: introduce NAND_CREATE_EMPTY_BBT 



it will create an empty BBT table without considering vendor's BBT
information. Vendor's information may be unavailable if the NAND
controller has a different DATA & OOB layout or this information may be
allready purged.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
parent 7cba7b14

drivers/mtd/nand/nand_bbt.c

+2 −1
Original line number Diff line number Diff line
@@ -999,6 +999,7 @@ static int check_create(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_desc 
			continue;



		/* Create the table in memory by scanning the chip(s) */

		if (!(this->options & NAND_CREATE_EMPTY_BBT))

			create_bbt(mtd, buf, bd, chipsel);



		td->version[i] = 1;

include/linux/mtd/bbm.h

+1 −1
Original line number Diff line number Diff line
@@ -84,7 +84,7 @@ struct nand_bbt_descr { 
#define NAND_BBT_PERCHIP	0x00000080

/* bbt has a version counter at offset veroffs */

#define NAND_BBT_VERSION	0x00000100

/* Create a bbt if none axists */

/* Create a bbt if none exists */

#define NAND_BBT_CREATE		0x00000200

/* Search good / bad pattern through all pages of a block */

#define NAND_BBT_SCANALLPAGES	0x00000400

include/linux/mtd/nand.h

+2 −0
Original line number Diff line number Diff line
@@ -223,6 +223,8 @@ typedef enum { 
 * the OOB area.

 */

#define NAND_USE_FLASH_BBT_NO_OOB	0x00100000

/* Create an empty BBT with no vendor information if the BBT is available */

#define NAND_CREATE_EMPTY_BBT		0x00200000



/* Options set by nand scan */

/* Nand scan has allocated controller struct */