Hello,
Please note that when CONFIG_SERIAL_SILENT is used you'll need to set the environmental variable silent to a non-empty value:
config SILENT_CONSOLE
bool "Support a silent console"
help
This option allows the console to be silenced, meaning that no output will appear on the console devices. This is controlled by setting the environment variable 'silent' to a non-empty value. Note this also silences the console when booting Linux.
When the console is set up, the variable is checked, and the GD_FLG_SILENT flag is set. Changing the environment variable later will update the flag.
https://github.com/nxp-imx/uboot-imx/blob/1c881f4da83cc05bee50f352fa183263d7e2622b/common/Kconfig#L9...
Best regards,
Aldo.
