On Thu, Mar 28, 2013 at 9:04 PM, Tom Rini <tr...@ti.com> wrote: > > On Thu, Mar 28, 2013 at 12:52:04PM +0800, Dashi Cao wrote: > > > Hi all, > > I have got a Beagleboard-xm, and I'm feeling that saving environment > > variable is an issue because this board has no NAND. > > > > U-Boot supports environment variable file located in a FAT file system. > > So I set out and made a new board omap3_beagle-xm, copied from > > omap3_beagle, but with environment file on the FAT of the microSD. > > > > I'm not sure if I'm just reinventing the wheel! > > An interesting concept and one I've thought about doing myself at some > point, so thanks! There's a better way to do this however. You can > have boards.cfg take a base config file (say omap3_beagle) and add > additional defines (say CONFIG_ENV_IS_IN_FAT) for a specific build > target (omap3_beagle_env_fat) and not have to copy all of the other > files. Then just modify omap3_beagle.h with: > #ifdef CONFIG_ENV_IS_IN_FAT > #undef CONFIG_ENV_IS_IN_NAND > #define FAT_FILE ... > ... > #endif >
Hi Dashi, If you want an example on how to do this, something similar is made for IGEP boards. There are two IGEP board types: IGEP COM Module and IGEPv2. These two boards are very similar and each one can have one of two flash memory types: NAND or OneNAND. The same board file (board/isee/igep00x0/igep00x0.c) is used for every <board type, flash type> combination and you can choose between 4 base configs defined in boards.cfg: igep0020 => igep00x0:MACH_TYPE=MACH_TYPE_IGEP0020,BOOT_ONENAND igep0020_nand => igep00x0:MACH_TYPE=MACH_TYPE_IGEP0020,BOOT_NAND igep0030 => igep00x0:MACH_TYPE=MACH_TYPE_IGEP0030,BOOT_ONENAND igep0030_nand => igep00x0:MACH_TYPE=MACH_TYPE_IGEP0030,BOOT_NAND Hope it helps. > And be set, more or less. And don't re-use the name uEnv.txt please. > How about u-boot-env.txt ? And we shouldn't need to populate to start > with, I hope at least, it should just be OK until the first saveenv > happens. > > -- > Tom > Best regards, Javier _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
