Appreciate the info, @anaelorlinski !
For those who may follow, here is what I did:
- Use cfdisk to expand partition
cfdisk /dev/mmcblk1- Use the cfdisk interface to then expand
/dev/mmcblkp2
- Use losetup and resize2fs to expand filesystem
opkg update
opkg install losetup resize2fs
# Map loop device to root partition
losetup /dev/loop1 /dev/mmcblk1p2
# Expand root filesystem
resize2fs -f /dev/loop1
# Apply changes
reboot