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diff --git a/recipes-bsp/u-boot/files/mx8/fw_env.config b/recipes-bsp/u-boot/files/mx8/fw_env.config
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+# 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.
+
+# Colibri iMX7 Dual 1GB (eMMC)
+# 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)
+
+# Block device name Device offset Env. size
+/dev/mmcblk0boot0 -0x2200 0x2000
+