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ARM: at91: at91sam9n12ek: save the environment to a fat file in MMC card

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Insteading in mmc's raw sectors, this patch will save the environment
in a fat file (uboot.env) in mmc card's first FAT patition by default.

If you want to save in mmc's raw sectors, you only need to define
CONFIG_ENV_IS_IN_MMC.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Acked-by: Bo Shen <voice.shen@atmel.com>
This commit is contained in:
Wu, Josh 2015-03-24 17:07:22 +08:00 committed by Andreas Bießmann
parent da78fb5414
commit 23ac62d4c7
1 changed files with 13 additions and 2 deletions

15
include/configs/at91sam9n12ek.h
View File

@ -201,11 +201,22 @@
#else /* CONFIG_SYS_USE_MMC */
/* bootstrap + u-boot + env + linux in mmc */
#define CONFIG_ENV_IS_IN_MMC
/* For FAT system, most cases it should be in the reserved sector */
#ifdef CONFIG_ENV_IS_IN_MMC
/* Use raw reserved sectors to save environment */
#define CONFIG_ENV_OFFSET 0x2000
#define CONFIG_ENV_SIZE 0x1000
#define CONFIG_SYS_MMC_ENV_DEV 0
#else
/* Use file in FAT file to save environment */
#define CONFIG_ENV_IS_IN_FAT
#define CONFIG_FAT_WRITE
#define FAT_ENV_INTERFACE "mmc"
#define FAT_ENV_FILE "uboot.env"
#define FAT_ENV_DEVICE_AND_PART "0"
#define CONFIG_ENV_SIZE 0x4000
#endif
#define CONFIG_BOOTCOMMAND \
"setenv bootargs ${console} ${mtdparts} ${bootargs_mmc};" \
"fatload mmc 0:1 0x21000000 dtb;" \