[MTD] [NAND] S3C2410: Allow the machine code to get the BBT table from NAND
Added a flag to allow the machine code to tell the NAND
subsystem that it should try to pickup a BBT from the flash,
and also skip the NAND full scan at startup.
Signed-off-by: Michel Pollet <buserror@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/plat-s3c/include/plat/nand.h b/arch/arm/plat-s3c/include/plat/nand.h
index 9356516..18f9588 100644
--- a/arch/arm/plat-s3c/include/plat/nand.h
+++ b/arch/arm/plat-s3c/include/plat/nand.h
@@ -13,6 +13,10 @@
/**
* struct s3c2410_nand_set - define a set of one or more nand chips
* @disable_ecc: Entirely disable ECC - Dangerous
+ * @flash_bbt: Openmoko u-boot can create a Bad Block Table
+ * Setting this flag will allow the kernel to
+ * look for it at boot time and also skip the NAND
+ * scan.
* @nr_chips: Number of chips in this set
* @nr_partitions: Number of partitions pointed to by @partitions
* @name: Name of set (optional)
@@ -25,6 +29,7 @@
*/
struct s3c2410_nand_set {
unsigned int disable_ecc:1;
+ unsigned int flash_bbt:1;
int nr_chips;
int nr_partitions;
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index ef56652..d315b51 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -845,6 +845,12 @@
dev_info(info->device, "NAND ECC UNKNOWN\n");
break;
}
+
+ /* If you use u-boot BBT creation code, specifying this flag will
+ * let the kernel fish out the BBT from the NAND, and also skip the
+ * full NAND scan that can take 1/2s or so. Little things... */
+ if (set->flash_bbt)
+ chip->options |= NAND_USE_FLASH_BBT | NAND_SKIP_BBTSCAN;
}
/**