tty/serial: add arm/arm64 semihosting earlycon

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Add earlycon support for the arm/arm64 semihosting debug serial
interface. This allows enabling a debug console when early_params are
processed. This is based on the arm64 earlyprintk smh support and is
intended to replace it.

Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Rob Herring 2014-04-18 17:19:58 -05:00 • committed by Greg Kroah-Hartman

parent 0d3c673e78

commit d50d7269eb

4 changed files with 74 additions and 0 deletions

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10

drivers/tty/serial/Kconfig

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1

drivers/tty/serial/Makefile

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61

drivers/tty/serial/earlycon-arm-semihost.c

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