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tty: serial: Add Actions Semi Owl UART earlycon

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This implements an earlycon for Actions Semi S500/S900 SoCs.

Based on LeMaker linux-actions tree.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andreas Färber
2017-06-19 03:46:40 +02:00
committed by Greg Kroah-Hartman
parent 80b208ed7b
commit e36361d70e
4 changed files with 161 additions and 0 deletions
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6
Documentation/admin-guide/kernel-parameters.txt
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@@ -945,6 +945,12 @@
must already be setup and configured. Options are not
yet supported.
owl,<addr>
Start an early, polled-mode console on a serial port
of an Actions Semi SoC, such as S500 or S900, at the
specified address. The serial port must already be
setup and configured. Options are not yet supported.
smh Use ARM semihosting calls for early console.
s3c2410,<addr>