immortalwrt 24.10.1 ssh 刷u-boot 失败

szcare@

诺基亚贝尔EA0326GMP，刷的immortalwrt 24.10.1,想刷带web的u-boot（mt7981_nokia_ea0326gmp-fip-fixed-parts.bin）,提示：Could not open mtd device: FIP
Can't open device for writing!

望能得到恩山各位大佬解答，谢谢！

1562004423

1. opkg update && opkg install kmod-mtd-rw

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1. insmod /lib/modules/$(uname -r)/mtd-rw.ko i_want_a_brick=1

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以上两步成功后，再使用mtd write命令刷写u-boot

szcare@

两步都成功，用mtd write刷写u-boot还是一样的提示。
Could not open mtd device: FIP
Can't open device for writing!