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Docs/kernel-parameters: Add earlycon devicetree usage
This form of the earlycon parameter was added by commit fb11ffe74c
("of/fdt: add FDT serial scanning for earlycon") without documentation.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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@ -973,6 +973,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
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earlycon= [KNL] Output early console device and options.
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When used with no options, the early console is
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determined by the stdout-path property in device
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tree's chosen node.
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cdns,<addr>
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Start an early, polled-mode console on a cadence serial
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port at the specified address. The cadence serial port
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