diff options
Diffstat (limited to 'recipes-bsp/u-boot/libubootenv/fw_env.config')
| -rw-r--r-- | recipes-bsp/u-boot/libubootenv/fw_env.config | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/recipes-bsp/u-boot/libubootenv/fw_env.config b/recipes-bsp/u-boot/libubootenv/fw_env.config new file mode 100644 index 0000000..d22acde --- /dev/null +++ b/recipes-bsp/u-boot/libubootenv/fw_env.config @@ -0,0 +1,18 @@ +# Configuration file for fw_(printenv/setenv) utility. +# Up to two entries are valid, in this case the redundant +# environment sector is assumed present. +# Device offset must be prefixed with 0x to be parsed as a hexadecimal value. +# On a block device a negative offset is treated as a backwards offset from the +# end of the device/partition, rather than a forwards offset from the start. + +# Toradex modules with eMMC +# The U-Boot environment is stored at the end of the first eMMC boot partition +# hence use a negative value. The environment is just in front of the config +# block which occupies the last sector (hence -0x200) +# Note that the eMMC boot areas (e.g. /dev/mmcblk0boot0) by default is read +# only. To make it writeable, execute on the cmdline e.g. +# $ echo 0 > /sys/block/mmcblk0boot0/force_ro +# The fw_setenv tool provided by libubootenv does this automatically. + +# Block device name Device offset Env. size +/dev/emmc-boot0 -0x2200 0x2000 |