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@@ -635,6 +635,22 @@ config SYS_STDIO_DEREGISTER
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removed (for example a USB keyboard) then this option can be
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enabled to ensure this is handled correctly.
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+config SPL_SYS_STDIO_DEREGISTER
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+ bool "Allow deregistering stdio devices in SPL"
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+ help
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+ Generally there is no need to deregister stdio devices since they
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+ are never deactivated. But if a stdio device is used which can be
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+ removed (for example a USB keyboard) then this option can be
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+ enabled to ensure this is handled correctly. This is very rarely
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+ needed in SPL.
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+
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+config SYS_DEVICE_NULLDEV
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+ bool "Enable a null device for stdio"
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+ help
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+ Enable creation of a "nulldev" stdio device. This allows silent
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+ operation of the console by setting stdout to "nulldev". Enable
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+ this to use a serial console under board control.
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+
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endmenu
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menu "Logging"
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