Wolfgang Denk wd@denx.de wrote：
No need to hack anything. All necessary defines to shut down the serial console completely are already in place. Just define them in your board config file.
After setting CONFIG_AUTOBOOT_KEYED && CONFIG_AUTOBOOT_STOP_STR, I got the expected result. Oops, I come to realise there are so many great things in the box, which need me to discover rather than hack it. No wander you neglected my question at first:-)
Thanks very much.
Also I should thank Carl to pull my thread out of the water. New things learned and two related patches were created as well.
===== Best regards,
Sam
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