soc: microchip: mec: Add MEC165xB chip series

We add Microchip MEC165xB SoC series.

Signed-off-by: Scott Worley <scott.worley@microchip.com>

Author: scottwcpg

soc/microchip/mec/mec165xb/CMakeLists.txt

@@ -0,0 +1,11 @@
+#
+# Copyright (c) 2025, Microchip Technology Inc.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+zephyr_include_directories(${ZEPHYR_BASE}/drivers)
+zephyr_sources(soc.c)
+zephyr_include_directories(.)
+
+set(SOC_LINKER_SCRIPT ${ZEPHYR_BASE}/include/zephyr/arch/arm/cortex_m/scripts/linker.ld CACHE INTERNAL "")

soc/microchip/mec/mec165xb/Kconfig

@@ -0,0 +1,13 @@
+# Microchip MEC165XB MCU core series
+
+# Copyright (c) 2025 Microchip Technology Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_MEC165XB
+	select ARM
+	select CPU_CORTEX_M4
+	select CPU_CORTEX_M_HAS_DWT
+	select CPU_HAS_ARM_MPU
+	select HAS_SWO
+	select HAS_MEC5_HAL
+	select SOC_PREP_HOOK

soc/microchip/mec/mec165xb/Kconfig.defconfig.series

@@ -0,0 +1,31 @@
+# Copyright (c) 2025 Microchip Technology Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+# Microchip MEC165xB MCU series configuration options
+
+if SOC_SERIES_MEC165XB
+
+config NUM_IRQS
+	# must be >= the highest interrupt number used
+	# - include the UART interrupts
+	# All NVIC external sources.
+	default 198
+
+config CORTEX_M_SYSTICK
+	depends on !MCHP_XEC_RTOS_TIMER
+
+config SYS_CLOCK_HW_CYCLES_PER_SEC
+	default $(dt_node_int_prop_int,/cpus/cpu@0,clock-frequency) if CORTEX_M_SYSTICK
+	default $(dt_node_int_prop_int,/soc/timer@40007400,clock-frequency) if MCHP_XEC_RTOS_TIMER
+
+if MCHP_XEC_RTOS_TIMER
+
+config SYS_CLOCK_TICKS_PER_SEC
+	default $(dt_node_int_prop_int,/soc/timer@40007400,clock-frequency)
+
+endif # MCHP_XEC_RTOS_TIMER
+
+config ARCH_HAS_CUSTOM_BUSY_WAIT
+	default y
+
+endif # SOC_SERIES_MEC165XB

soc/microchip/mec/mec165xb/Kconfig.soc

@@ -0,0 +1,20 @@
+# Copyright (c) 2025 Microchip Technology Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+# Microchip MEC165xB MCU core series
+
+config SOC_SERIES_MEC165XB
+	bool
+	select SOC_FAMILY_MICROCHIP_MEC
+	help
+	  Enable support for Microchip MEC Cortex-M4 MCU series
+
+config SOC_SERIES
+	default "mec165xb" if SOC_SERIES_MEC165XB
+
+config SOC_MEC1653B_NSZ
+	bool
+	select SOC_SERIES_MEC165XB
+
+config SOC
+	default "mec1653b_nsz" if SOC_MEC1653B_NSZ

soc/microchip/mec/mec165xb/soc.c

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2025 Microchip Technology Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/device.h>
+#include <zephyr/init.h>
+#include <zephyr/kernel.h>
+#include <soc.h>
+#include <soc_cmn_init.h>
+
+void soc_prep_hook(void)
+{
+	mec5_soc_common_init();
+}

soc/microchip/mec/mec165xb/soc.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2025 Microchip Technology Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef __SOC_MICROCHIP_MEC_MEC165XB_SOC_H
+#define __SOC_MICROCHIP_MEC_MEC165XB_SOC_H
+
+#define SYSCLK_DEFAULT_IOSC_HZ MHZ(96)
+
+#ifndef _ASMLANGUAGE
+
+#include "device_mec5.h"
+
+/* common SoC API */
+#include "soc_dt.h"
+#include "soc_espi_channels.h"
+#include "soc_gpio.h"
+#include "soc_pcr.h"
+#include "soc_pins.h"
+
+#endif
+#endif

soc/microchip/mec/soc.yml

@@ -4,6 +4,9 @@ family:
   - name: mec15xx
     socs:
     - name: mec1501_hsz
+  - name: mec165xb
+    socs:
+    - name: mec1653b_nsz
   - name: mec172x
     socs:
     - name: mec172x_nsz