drivers: uart: create ambiq uart driver for apollo510

This commit creates ambiq uart driver for Apollo510 SoC,
not to use the pl011 driver any more.

Signed-off-by: Hao Luo <hluo@ambiq.com>

Author: AlessandroLuo

drivers/serial/CMakeLists.txt

@@ -20,6 +20,7 @@ zephyr_library_sources_ifdef(CONFIG_SERIAL_ESP32_USB serial_esp32_usb.c)
 zephyr_library_sources_ifdef(CONFIG_UART_AESC uart_aesc.c)
 zephyr_library_sources_ifdef(CONFIG_UART_ALTERA uart_altera.c)
 zephyr_library_sources_ifdef(CONFIG_UART_ALTERA_JTAG uart_altera_jtag.c)
+zephyr_library_sources_ifdef(CONFIG_UART_AMBIQ uart_ambiq.c)
 zephyr_library_sources_ifdef(CONFIG_UART_APBUART uart_apbuart.c)
 zephyr_library_sources_ifdef(CONFIG_UART_BCM2711_MU uart_bcm2711.c)
 zephyr_library_sources_ifdef(CONFIG_UART_BFLB uart_bflb.c)

drivers/serial/Kconfig

@@ -160,6 +160,7 @@ comment "Serial Drivers"
 rsource "Kconfig.aesc"
 rsource "Kconfig.altera"
 rsource "Kconfig.altera_jtag"
+rsource "Kconfig.ambiq"
 rsource "Kconfig.apbuart"
 rsource "Kconfig.b91"
 rsource "Kconfig.bcm2711"

drivers/serial/Kconfig.ambiq

@@ -0,0 +1,15 @@
+# Copyright (c) 2025, Ambiq Micro Inc. <www.ambiq.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config UART_AMBIQ
+	bool "AMBIQ UART driver"
+	default y
+	depends on DT_HAS_AMBIQ_UART_ENABLED
+	depends on SOC_SERIES_APOLLO5X
+	select SERIAL_HAS_DRIVER
+	select SERIAL_SUPPORT_INTERRUPT
+	select PINCTRL
+	select AMBIQ_HAL
+	select AMBIQ_HAL_USE_UART
+	help
+	  Enable the AMBIQ UART driver.