9cc3fa1b8a
The Raspberry Pi has two different UART devices pin-muxed to GPIO 14&15: One ARM PL011 one and the 8250 compatible "Mini-UART". A dtoverlay parameter in config.txt will tell the firmware to switch between the two: it will setup the right clocks and will configure the pinmuxes accordingly. To autodetect the user's choice, we read the pinmux register and check its setting: ALT5 (0x2) means the Mini-UART is used, ALT0 (0x4) points to the PL011. Based on that we select the UART driver to initialise. This will allow console output in any case. Change-Id: I620d3ce68de6c6576599f2a405636020e1fd1376 Signed-off-by: Andre Przywara <andre.przywara@arm.com> |
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| common | ||
| rpi3 | ||
| rpi4 | ||