[U-Boot] [patch u-boot arm/next] davinci dm6446evm NAND update

[David Brownell <david-b@pacbell.net>]

From: David Brownell <dbrownell@users.sourceforge.net>

This updates the optional (non-default!) NAND support for the
DaVinci DM6446 EVM:

 - include MTD partitioning, defaulting to what Linux uses

 - use a flash-based BBT, which among other things speeds bootup

This matches code that's now queued for mainline Linux, and might
even merge in an upcoming 2.6.30-rc; the MTIDS are set up so that
the U-Boot $mtdparts environment variable can be passed as-is on
the kernel command line, as a cmdlinepart override.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

--- a/include/configs/davinci_dvevm.h
+++ b/include/configs/davinci_dvevm.h
@@ -119,6 +121,10 @@
 #ifdef CONFIG_SYS_NAND_SMALLPAGE
 #define CONFIG_ENV_SECT_SIZE	512	/* Env sector Size */
 #define CONFIG_ENV_SIZE		SZ_16K
+#define CONFIG_MTD_PARTITIONS
+#define CONFIG_CMD_MTDPARTS
+#define MTDIDS_DEFAULT		"nand0=davinci_nand.0"
+#define MTDPARTS_DEFAULT	"mtdparts=davinci_nand.0:384k(bootloader)ro,4m(kernel),-(filesystem)"
 #else
 #define CONFIG_ENV_SECT_SIZE	2048	/* Env sector Size */
 #define CONFIG_ENV_SIZE		SZ_128K
@@ -126,6 +132,7 @@
 #define CONFIG_SKIP_LOWLEVEL_INIT	/* U-Boot is loaded by a bootloader */
 #define CONFIG_SKIP_RELOCATE_UBOOT	/* to a proper address, init done */
 #define CONFIG_SYS_NAND_BASE		0x02000000
+#define CONFIG_SYS_NAND_USE_FLASH_BBT
 #define CONFIG_SYS_NAND_HW_ECC
 #define CONFIG_SYS_MAX_NAND_DEVICE	1	/* Max number of NAND devices */
 #define CONFIG_ENV_OFFSET		0x0	/* Block 0--not used by bootcode */