OpenWrt – Yuanle's Blog https://blog2.emacsos.com Sun, 14 Dec 2025 06:37:50 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://blog2.emacsos.com/wp-content/uploads/2025/05/favicon-150x150.png OpenWrt – Yuanle's Blog https://blog2.emacsos.com 32 32 How to write to a protected FIP partition in openwrt? https://blog2.emacsos.com/how-to-write-to-a-protected-fip-partition-in-openwrt.html Sat, 21 Jun 2025 09:58:03 +0000 https://blog2.emacsos.com/?p=102 When you try to write u-boot image to a partition, sometimes you get this error msg:

Could not open mtd device: fip
Can't open device for writing!

You may use this trick to allow write to the FIP and other MTD partitions.

opkg update
opkg install kmod-mtd-rw

insmod /lib/modules/$(uname -r)/mtd-rw.ko i_want_a_brick=1
# the i_want_a_brick=1 part is required! Otherwise, the command will fail.

Now you can run the mtd write command again.

If write still fail, make sure the partition name is correct. The partition name is case sensitive. You can check the partition name using

cat /proc/mtd
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