This PR enable the mini UART on the Raspberry Pi 3.
The Linux console can be re-enabled by adding enable_uart=1 to config.txt. This also fixes the core_freq to 250Mhz (unless force_turbo is set, when it will fixed to 400Mhz), which means that the UART baud rate stays consistent.
This PR enable the mini UART on the Raspberry Pi 3.
— The Raspberry Pi UARTs
See also: How do I make serial work on the Raspberry Pi3