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Microchip: MEC172x: Add UART driver

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Microchip XEC has been using the standard NS16550 driver.
Using the standard NS16550 driver requires extra HW programming
for XEC UART in board level and did not support XEC GIRQ interrupt
programming. We add an XEC specific driver and remove UART specific
register programming from the board level and implement interrupt
support. Also, by implementing a SoC specific driver we can add
driver PM in the future.

Signed-off-by: Scott Worley <scott.worley@microchip.com>
This commit is contained in:
Scott Worley 2021-08-05 11:15:48 -04:00 • committed by Christopher Friedt
commit ad19104f28
9 changed files with 974 additions and 24 deletions
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drivers/serial/CMakeLists.txt
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@ -42,6 +42,7 @@ 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_USB_CDC_ACM ${ZEPHYR_BASE}/misc/empty_file.c)
zephyr_library_sources_ifdef(CONFIG_UART_RCAR uart_rcar.c)
zephyr_library_sources_ifdef(CONFIG_UART_XEC uart_mchp_xec.c)
zephyr_library_sources_ifdef(CONFIG_USERSPACE uart_handlers.c)