drivers: uart: microchip: add minimal support for sercom uart g1 IPs

Add uart driver with minimal features.
Implement polling receive and transmit functionality.

Signed-off-by: Sunil Abraham <[email protected]>

Author: sunil-abraham

drivers/serial/CMakeLists.txt

@@ -47,6 +47,7 @@ zephyr_library_sources_ifdef(CONFIG_UART_LITEX uart_litex.c)
 zephyr_library_sources_ifdef(CONFIG_UART_LPC11U6X uart_lpc11u6x.c)
 zephyr_library_sources_ifdef(CONFIG_UART_MAX32 uart_max32.c)
 zephyr_library_sources_ifdef(CONFIG_UART_MCHP_MEC5 uart_mchp_mec5.c)
+zephyr_library_sources_ifdef(CONFIG_UART_MCHP_SERCOM_G1 uart_mchp_sercom_g1.c)
 zephyr_library_sources_ifdef(CONFIG_UART_MCUX uart_mcux.c)
 zephyr_library_sources_ifdef(CONFIG_UART_MCUX_FLEXCOMM uart_mcux_flexcomm.c)
 zephyr_library_sources_ifdef(CONFIG_UART_MCUX_IUART uart_mcux_iuart.c)

drivers/serial/Kconfig

@@ -188,6 +188,7 @@ rsource "Kconfig.leuart_gecko"
 rsource "Kconfig.litex"
 rsource "Kconfig.lpc11u6x"
 rsource "Kconfig.max32"
+rsource "Kconfig.mchp"
 rsource "Kconfig.mcux"
 rsource "Kconfig.mcux_flexcomm"
 rsource "Kconfig.mcux_iuart"

drivers/serial/Kconfig.mchp

@@ -0,0 +1,18 @@
+# Copyright (c) 2025 Microchip Technology Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config UART_MCHP_SERCOM_ID_U2201_5_0_0
+	bool
+	default n
+	help
+	  Internal flag to enable SERCOM ID U2201_5_0_0 specific support.
+
+config UART_MCHP_SERCOM_G1
+	bool "Microchip SERCOM G1 UART driver"
+	default y
+	depends on DT_HAS_MICROCHIP_SERCOM_G1_UART_ENABLED
+	select SERIAL_HAS_DRIVER
+	select PINCTRL
+	select UART_MCHP_SERCOM_ID_U2201_5_0_0 if SOC_FAMILY_MCHP_SAM_D5X_E5X
+	help
+		This option enables the USART driver for Microchip sercom-g1 IPs.