Implement custom u-boot command

Question

I want to add custom command command to u-boot be it a simple hello world command.

After searching I found this link Yocto u-boot Custom Commands where it s

Answer 1

doc/README.commands describes how commands should be implemented.

Your new C file should be in directory cmd/. In cmd/Makefile you will have to add your object file, e.g.

obj-$(CONFIG_CMD_TIMER) += timer.o

In cmd/Kconfig add a new configuration option for your command. The Kconfig syntax is described in https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt.

Run

make menuconfig

to enable your configuration option.