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arm: mvebu: turris_omnia: Allow to use second serial port

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Turris Omnia has two serial ports. Both are already specified in device
tree file. But U-Boot by default does not allow to use more than one serial
port unless CONFIG_SERIAL_PROBE_ALL is not enabled.

After enabling CONFIG_SERIAL_PROBE_ALL, U-Boot see also second serial port
(but is inactive by default):

    => coninfo
    List of available devices:
    serial@12000 00000007 IO stdin stdout stderr
    serial@12100 00000007 IO

To allow simultaneously to use more input / output devices it is needed to
enable CONFIG_CONSOLE_MUX option.

With CONFIG_CONSOLE_MUX it is possible to call:

    => setenv stdout 'serial@12000,serial@12100'

And U-Boot output is then visible on both serial ports.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
This commit is contained in:
Pali Rohár 2022-09-09 14:18:48 +02:00 committed by Stefan Roese
parent 634aa8e586
commit cadda05a76
1 changed files with 2 additions and 0 deletions
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2
configs/turris_omnia_defconfig
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@ -33,6 +33,7 @@ CONFIG_FIT_VERBOSE=y
CONFIG_OF_BOARD_SETUP=y
CONFIG_BOOTDELAY=3
CONFIG_USE_PREBOOT=y
CONFIG_CONSOLE_MUX=y
CONFIG_SYS_CONSOLE_INFO_QUIET=y
# CONFIG_DISPLAY_BOARDINFO is not set
CONFIG_DISPLAY_BOARDINFO_LATE=y
@ -103,6 +104,7 @@ CONFIG_PINCTRL_ARMADA_38X=y
CONFIG_DM_RTC=y
CONFIG_RTC_ARMADA38X=y
CONFIG_SCSI=y
CONFIG_SERIAL_PROBE_ALL=y
CONFIG_SPL_DEBUG_UART_BASE=0xd0012000
CONFIG_DEBUG_UART_SHIFT=2
CONFIG_SYS_NS16550=y