You need a more recent version of this (sunxi-tools) fel utility" · Issue #124 · linux-sunxi/sunxi-tools · GitHub
GitHub - RoEdAl/alarm-uboot-sunxi-aarch64: U-Boot bootloaders for Allwinner-based boards [Arch Linux ARM, 64-bit]
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Building and Booting Upstream Linux and U-Boot for Orange Pi One ARM Board (with Ethernet) – Just another Linux geek
Embedded Engineering : DIY Homemade ARM Board Running Linux with LCD: Part 4 U-boot Bootloader Porting and Cross Compile
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