Re: [PATCH] arm: mvebu: turris_omnia: Allow to use second serial port

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 pali@kernel.org

Reviewed-by: Stefan Roese sr@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