mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-30 15:03:18 +00:00
24 lines
1 KiB
Text
24 lines
1 KiB
Text
|
------------------------------
|
||
|
|
U-Boot console UART selection:
|
||
|
|
------------------------------
|
||
|
|
|
||
|
|
The U-Boot port for this congatec board currently supports two different
|
||
|
|
configurations (defconfig files). The only difference is the UART that
|
||
|
|
is used as the U-Boot console UART. The default defconfig file:
|
||
|
|
|
||
|
|
conga-qeval20-qa3-e3845_defconfig
|
||
|
|
|
||
|
|
provides this console on the UART0 which is provided via a Winbond
|
||
|
|
Super-IO chip connected on the congatec Qseven 2.0 evaluation carrier
|
||
|
|
board (conga-QEVAL). This UART is the one provided with a SubD9
|
||
|
|
connector on the mainboard (the low one). The 2nd defconfig file:
|
||
|
|
|
||
|
|
conga-qeval20-qa3-e3845-internal-uart_defconfig
|
||
|
|
|
||
|
|
provides the U-Boot console on the BayTrail internal legacy UART,
|
||
|
|
which is routed from the QSeven SoM to the X300 connector on the
|
||
|
|
baseboard. Here is called COM2. The baseboard already provides the
|
||
|
|
RS232 level shifters. So a TTL-USB UART adapter does not work in
|
||
|
|
this case. The signals need to get connected directly to the
|
||
|
|
RS232 level signals of the PC UART via some adapter cable.
|