drivers/tty/serial/pch_uart.c: add console support

Add console support to pch_uart.  To enable append e.g.
console=ttyPCH0,115200 to your kernel command line.

This is not expected work on CM-iTC boards due to their having a different
clock.

Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/tty/serial/Kconfig b/drivers/tty/serial/Kconfig
index 5f479dada6f2..956f2f02947b 100644
--- a/drivers/tty/serial/Kconfig
+++ b/drivers/tty/serial/Kconfig
@@ -1575,6 +1575,15 @@ config SERIAL_PCH_UART
           ML7213/ML7223 is companion chip for Intel Atom E6xx series.
           ML7213/ML7223 is completely compatible for Intel EG20T PCH.
 
+config SERIAL_PCH_UART_CONSOLE
+        bool "Support for console on Intel EG20T PCH UART/OKI SEMICONDUCTOR ML7213 IOH"
+        depends on SERIAL_PCH_UART=y
+        select SERIAL_CORE_CONSOLE
+        help
+          Say Y here if you wish to use the PCH UART as the system console
+          (the system  console is the device which receives all kernel messages and
+          warnings and which allows logins in single user mode).
+
 config SERIAL_MSM_SMD
         bool "Enable tty device interface for some SMD ports"
         default n