From 9db41f9edcb87ae050fcb171c44be7f212728d54 Mon Sep 17 00:00:00 2001 From: Michel Pollet Date: Wed, 13 May 2009 16:54:14 +0100 Subject: [PATCH] [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 Signed-off-by: Ben Dooks --- arch/arm/plat-s3c/include/plat/nand.h | 5 +++++ drivers/mtd/nand/s3c2410.c | 6 ++++++ 2 files changed, 11 insertions(+) diff --git a/arch/arm/plat-s3c/include/plat/nand.h b/arch/arm/plat-s3c/include/plat/nand.h index 935651664969..18f958801e64 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 ef5665258968..d315b513db5c 100644 --- a/drivers/mtd/nand/s3c2410.c +++ b/drivers/mtd/nand/s3c2410.c @@ -845,6 +845,12 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info, 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; } /**