Hi Wills,
Please note the following,
1. add this uart to drivers/serial/Kconfig .
2. add debug uart support. see include/debug_uart.h . also add it to Kconfig
3. cp linux/Documentation/devicetree/bindings/serial/qca,ar9330-uart.txt
u-boot/doc/device-tree-bindings/serial/
4. to save change to xxx_defconfig, run
make savedefconfig
cp defconfig configs/xxx_defconfig
Best regards,
Thomas
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