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- The config option CONFIG_SILENT_CONSOLE can be used to quiet messages
- on the console. If the option has been enabled, the output can be
- silenced by setting the environment variable "silent". The variable
- is latched into the global data at an early stage in the boot process
- so deleting it with "setenv" will not take effect until the system is
- restarted.
- The following actions are taken if "silent" is set at boot time:
- - Until the console devices have been initialized, output has to be
- suppressed by testing for the flag "GD_FLG_SILENT" in "gd->flags".
- - When the console devices have been initialized, "stdout" and
- "stderr" are set to "nulldev", so subsequent messages are
- suppressed automatically. Make sure to enable "nulldev" by
- #defining CONFIG_SYS_DEVICE_NULLDEV in your board config file.
- - When booting a linux kernel, the "bootargs" are fixed up so that
- the argument "console=" will be in the command line, no matter how
- it was set in "bootargs" before.
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