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serial: Add support for GRLIB APBUART

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This adds support for the GRLIB APBUART UART peripheral commonly used in
LEON3/4/5 systems.

Driver features:
- Auto-detecting debug FIFO, if configured by GRMON
- Setting and getting UART transfer attributes
- Hardware FIFO if available
- Any number of APBUART devices based on devicetree
- Error status indication
- Polled operation

Signed-off-by: Martin Åberg <martin.aberg@gaisler.com>
This commit is contained in:
Martin Åberg 2020-10-16 20:57:50 +02:00 • committed by Andrew Boie
commit 4888afd793
5 changed files with 375 additions and 0 deletions
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1
drivers/serial/CMakeLists.txt
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@ -35,6 +35,7 @@ zephyr_library_sources_ifdef(CONFIG_UART_XLNX_PS uart_xlnx_ps.c)
zephyr_library_sources_ifdef(CONFIG_UART_XLNX_UARTLITE uart_xlnx_uartlite.c)
zephyr_library_sources_ifdef(CONFIG_UART_XMC4XXX uart_xmc4xxx.c)
zephyr_library_sources_ifdef(CONFIG_UART_NPCX uart_npcx.c)
zephyr_library_sources_ifdef(CONFIG_UART_APBUART uart_apbuart.c)
zephyr_library_sources_ifdef(CONFIG_USERSPACE uart_handlers.c)