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This patch makes creation of the BBT optional for the s3c24x0 platform.
It adds:
- a new platform-independent NAND-wide flag NAND_DONT_CREATE_BBT
- one user of this flag, namely s3c24x0
Experimental.
- Werner Almesberger <werner@openmoko.org>
Index: u-boot/cpu/arm920t/s3c24x0/nand.c
===================================================================
--- u-boot.orig/cpu/arm920t/s3c24x0/nand.c 2007-02-16 23:53:29.000000000 +0100
+++ u-boot/cpu/arm920t/s3c24x0/nand.c 2007-02-16 23:53:54.000000000 +0100
@@ -169,7 +169,7 @@
nand->eccmode = NAND_ECC_SOFT;
#ifdef CONFIG_S3C2410_NAND_BBT
- nand->options = NAND_USE_FLASH_BBT;
+ nand->options = NAND_USE_FLASH_BBT | NAND_DONT_CREATE_BBT;
#else
nand->options = 0;
#endif
Index: u-boot/drivers/nand/nand_bbt.c
===================================================================
--- u-boot.orig/drivers/nand/nand_bbt.c 2007-02-16 23:53:36.000000000 +0100
+++ u-boot/drivers/nand/nand_bbt.c 2007-02-16 23:53:54.000000000 +0100
@@ -678,7 +678,8 @@
}
create:
/* Create the bad block table by scanning the device ? */
- if (!(td->options & NAND_BBT_CREATE))
+ if (!(td->options & NAND_BBT_CREATE) ||
+ (this->options & NAND_DONT_CREATE_BBT))
continue;
/* Create the table in memory by scanning the chip(s) */
Index: u-boot/include/linux/mtd/nand.h
===================================================================
--- u-boot.orig/include/linux/mtd/nand.h 2007-02-16 23:53:08.000000000 +0100
+++ u-boot/include/linux/mtd/nand.h 2007-02-16 23:53:54.000000000 +0100
@@ -187,7 +187,8 @@
* This can only work if we have the ecc bytes directly behind the
* data bytes. Applies for DOC and AG-AND Renesas HW Reed Solomon generators */
#define NAND_HWECC_SYNDROME 0x00020000
-
+/* Do not create an BBT if none is found. Overrides NAND_BBT_CREATE. */
+#define NAND_DONT_CREATE_BBT 0x00040000
/* Options set by nand scan */
/* Nand scan has allocated oob_buf */
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