- Refactor the pl011 driver to be extensible. - Add IRQ support and baudrate configuration support for pl011 driver. - Modify related BSP. - Add doxygen comments for arm-pl011. Close #5026 Co-authored-by: Ning Yang <yangn0@qq.com>
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Updates #3053.
Updates #4625.
This UART driver is now needed for BSPs other than ARM.