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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".
- - CONFIG_SILENT_CONSOLE_UPDATE_ON_SET
- When the "silent" variable is changed with env set, the change
- will take effect immediately.
- - CONFIG_SILENT_CONSOLE_UPDATE_ON_RELOC
- Some environments are not available until relocation (e.g. NAND)
- so this will make the value in the flash env take effect at
- relocation.
- 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
- enabling CONFIG_SYS_DEVICE_NULLDEV in your board defconfig 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. If you don't want the linux command
- line to be affected, define CONFIG_SILENT_U_BOOT_ONLY in your board
- config file as well, and this part of the feature will be disabled.
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