On 09.09.22 14:18, Pali Rohár wrote:
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 <p...@kernel.org>

Reviewed-by: Stefan Roese <s...@denx.de>

Thanks,
Stefan

---
  configs/turris_omnia_defconfig | 2 ++
  1 file changed, 2 insertions(+)

diff --git a/configs/turris_omnia_defconfig b/configs/turris_omnia_defconfig
index 4c9ec744e1b5..01dee5472200 100644
--- a/configs/turris_omnia_defconfig
+++ b/configs/turris_omnia_defconfig
@@ -35,6 +35,7 @@ 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
@@ -105,6 +106,7 @@ 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

Viele Grüße,
Stefan Roese

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