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console: Add help for serial IO port selection 

Add help and a comment about the serial IO port selection to give the
user better feedback when a port index is selected.

Change-Id: I4c1614be51aee0286308fbc5c24554e218120bf7
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: http://review.coreboot.org/12487
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Martin Roth 2015-11-19 11:40:43 -07:00
parent b50d8fbb6e
commit ac76ed9998
1 changed files with 12 additions and 0 deletions
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12
src/console/Kconfig
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@ -43,6 +43,9 @@ if CONSOLE_SERIAL
config UART_FOR_CONSOLE
int "Index for UART port to use for console"
default 0
help
Select an I/O port to use for serial console:
0 = 0x3f8, 1 = 0x2f8, 2 = 0x3e8, 3 = 0x2e8
# FIXME: Early programming in romstage is incorrect as we should
# program different LDN to actually change the physical port.
@ -56,6 +59,15 @@ config TTYS0_BASE
help
Map the COM port number to the respective I/O port.
comment "Serial port base address = 0x3f8"
depends on UART_FOR_CONSOLE = 0
comment "Serial port base address = 0x2f8"
depends on UART_FOR_CONSOLE = 1
comment "Serial port base address = 0x3e8"
depends on UART_FOR_CONSOLE = 2
comment "Serial port base address = 0x2e8"
depends on UART_FOR_CONSOLE = 3
choice
prompt "Baud rate"
default CONSOLE_SERIAL_115200