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From be7844e174757ecc8aae7eb0411a7a8801da3aa8 Mon Sep 17 00:00:00 2001
From: Michel Pollet <buserror@gmail.com>
Date: Fri, 13 Mar 2009 18:16:48 +0000
Subject: [PATCH] S3C: 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.
---
arch/arm/plat-s3c/include/plat/nand.h | 4 +++-
drivers/mtd/nand/s3c2410.c | 7 +++++++
2 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/arch/arm/plat-s3c/include/plat/nand.h b/arch/arm/plat-s3c/include/plat/nand.h
index f4dcd14..0bcd5d0 100644
--- a/arch/arm/plat-s3c/include/plat/nand.h
+++ b/arch/arm/plat-s3c/include/plat/nand.h
@@ -22,7 +22,9 @@
*/
struct s3c2410_nand_set {
- unsigned int disable_ecc : 1;
+ unsigned int disable_ecc : 1,
+ /* openmoko u-boot can create BBT */
+ flash_bbt : 1;
int nr_chips;
int nr_partitions;
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index 8e375d5..f813ca9 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -757,6 +757,13 @@ static void s3c2410_nand_init_chip(struct s3c2410_nand_info *info,
if (set->disable_ecc)
chip->ecc.mode = NAND_ECC_NONE;
+
+ /* 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;
+
}
/* s3c2410_nand_update_chip
--
1.5.6.3
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