tty/serial: add arm/arm64 semihosting earlycon
authorRob Herring <robh@kernel.org>
Fri, 18 Apr 2014 22:19:58 +0000 (17:19 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 24 Apr 2014 23:32:27 +0000 (16:32 -0700)
commitd50d7269ebcb438afa346cdffce0f4e2a1b9e831
tree7095e7a34467771f9b0e3c2f113cbeb6e7ff5145
parent0d3c673e7881e691991b2a4745bd4f149603baa2
tty/serial: add arm/arm64 semihosting earlycon

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>
Documentation/kernel-parameters.txt
drivers/tty/serial/Kconfig
drivers/tty/serial/Makefile
drivers/tty/serial/earlycon-arm-semihost.c [new file with mode: 0644]