For production systems it is better to use script images since they are protected by checksums and carry valuable information like name and timestamp. Also, you can't validate the content passed to env import.
But for development, it is easier to use the env import command and plain text files instead of script-images.
Since both OMAP5evm/uevm boards are used primarily for development, we allow U-Boot to load env var from a text file in case that an boot.scr script-image is not present.
The variable uenvcmd (if existent) will be executed (using run) after uEnv.txt was loaded. If uenvcmd doesn't exist the default boot sequence will be started.
Inspired by commit: d70f54808dfa83b574e1239c3eccbcf3317343e1 (omap4: allow the use of a plain text env file instead boot scripts)
Signed-off-by: Nishanth Menon nm@ti.com --- include/configs/omap5_common.h | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/include/configs/omap5_common.h b/include/configs/omap5_common.h index af97564..3174423 100644 --- a/include/configs/omap5_common.h +++ b/include/configs/omap5_common.h @@ -155,6 +155,9 @@ "loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr\0" \ "bootscript=echo Running bootscript from mmc${mmcdev} ...; " \ "source ${loadaddr}\0" \ + "loadbootenv=fatload mmc ${mmcdev} ${loadaddr} uEnv.txt\0" \ + "importbootenv=echo Importing environment from mmc${mmcdev} ...; " \ + "env import -t ${loadaddr} ${filesize}\0" \ "loaduimage=fatload mmc ${mmcdev} ${loadaddr} uImage\0" \ "mmcboot=echo Booting from mmc${mmcdev} ...; " \ "run mmcargs; " \ @@ -165,9 +168,16 @@ "if run loadbootscript; then " \ "run bootscript; " \ "else " \ - "if run loaduimage; then " \ - "run mmcboot; " \ - "fi; " \ + "if run loadbootenv; then " \ + "run importbootenv; " \ + "fi;" \ + "if test -n ${uenvcmd}; then " \ + "echo Running uenvcmd ...;" \ + "run uenvcmd;" \ + "fi;" \ + "fi;" \ + "if run loaduimage; then " \ + "run mmcboot; " \ "fi; " \ "fi"