soc: nuvoton: numaker: add support for m2l31x series

Add initial support for nuvoton numaker m2l31x SoC series
including basic init.

Signed-off-by: cyliang tw <cyliang@nuvoton.com>

soc/nuvoton/numaker/m2l31x/CMakeLists.txt

@@ -0,0 +1,9 @@
+# Copyright (c) 2024 Nuvoton Technology Corporation.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+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/nuvoton/numaker/m2l31x/Kconfig

@@ -0,0 +1,14 @@
+# Copyright (c) 2024 Nuvoton Technology Corporation.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_M2L31X
+	select ARM
+	select CPU_CORTEX_M23
+	select CPU_CORTEX_M_HAS_SYSTICK
+	select CPU_CORTEX_M_HAS_DWT
+	select CPU_CORTEX_M_HAS_VTOR
+	select CPU_HAS_ARM_MPU
+
+config SOC_M2L31XXX
+	select HAS_NUMAKER_HAL

soc/nuvoton/numaker/m2l31x/Kconfig.defconfig

@@ -0,0 +1,9 @@
+# Copyright (c) 2024 Nuvoton Technology Corporation.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_SERIES_M2L31X
+
+rsource "Kconfig.defconfig.m2l31*"
+
+endif # SOC_SERIES_M2L31X

soc/nuvoton/numaker/m2l31x/Kconfig.defconfig.m2l31xxx

@@ -0,0 +1,10 @@
+# Copyright (c) 2024 Nuvoton Technology Corporation.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_M2L31XXX
+
+config NUM_IRQS
+	default 143
+
+endif # SOC_M2L31XXX

soc/nuvoton/numaker/m2l31x/Kconfig.soc

@@ -0,0 +1,19 @@
+# Copyright (c) 2024 Nuvoton Technology Corporation.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_M2L31X
+	bool
+	select SOC_FAMILY_NUMAKER
+	help
+	  Enable support for Nuvoton M2L31X MCU series
+
+config SOC_M2L31XXX
+	bool
+	select SOC_SERIES_M2L31X
+
+config SOC_SERIES
+	default "m2l31x" if SOC_SERIES_M2L31X
+
+config SOC
+	default "m2l31xxx" if SOC_M2L31XXX

soc/nuvoton/numaker/m2l31x/soc.c

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2024 Nuvoton Technology Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/devicetree.h>
+#include <zephyr/drivers/clock_control/clock_control_numaker.h>
+/* Hardware and starter kit includes. */
+#include <NuMicro.h>
+
+void z_arm_platform_init(void)
+{
+	SystemInit();
+
+	/* Unlock protected registers */
+	SYS_UnlockReg();
+
+	/*
+	 * -------------------
+	 * Init System Clock
+	 * -------------------
+	 */
+
+#if DT_NODE_HAS_PROP(DT_NODELABEL(scc), hxt)
+	/* Enable/disable 4~24 MHz external crystal oscillator (HXT) */
+	if (DT_ENUM_IDX(DT_NODELABEL(scc), hxt) == NUMAKER_SCC_CLKSW_ENABLE) {
+		CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
+		/* Wait for HXT clock ready */
+		CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk);
+	} else if (DT_ENUM_IDX(DT_NODELABEL(scc), hxt) == NUMAKER_SCC_CLKSW_DISABLE) {
+		CLK_DisableXtalRC(CLK_PWRCTL_HXTEN_Msk);
+	}
+#endif
+
+#if DT_NODE_HAS_PROP(DT_NODELABEL(scc), lxt)
+	/* Enable/disable 32.768 kHz low-speed external crystal oscillator (LXT) */
+	if (DT_ENUM_IDX(DT_NODELABEL(scc), lxt) == NUMAKER_SCC_CLKSW_ENABLE) {
+		CLK_EnableXtalRC(CLK_PWRCTL_LXTEN_Msk);
+		/* Wait for LXT clock ready */
+		CLK_WaitClockReady(CLK_STATUS_LXTSTB_Msk);
+	} else if (DT_ENUM_IDX(DT_NODELABEL(scc), lxt) == NUMAKER_SCC_CLKSW_DISABLE) {
+		CLK_DisableXtalRC(CLK_PWRCTL_LXTEN_Msk);
+	}
+#endif
+
+	/* Enable 12 MHz high-speed internal RC oscillator (HIRC) */
+	CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
+	/* Wait for HIRC clock ready */
+	CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
+
+	/* Enable 32 KHz low-speed internal RC oscillator (LIRC) */
+	CLK_EnableXtalRC(CLK_PWRCTL_LIRCEN_Msk);
+	/* Wait for LIRC clock ready */
+	CLK_WaitClockReady(CLK_STATUS_LIRCSTB_Msk);
+
+#if DT_NODE_HAS_PROP(DT_NODELABEL(scc), hirc48)
+	/* Enable/disable 48 MHz high-speed internal RC oscillator (HIRC48) */
+	if (DT_ENUM_IDX(DT_NODELABEL(scc), hirc48) == NUMAKER_SCC_CLKSW_ENABLE) {
+		CLK_EnableXtalRC(CLK_PWRCTL_HIRC48EN_Msk);
+		/* Wait for HIRC48 clock ready */
+		CLK_WaitClockReady(CLK_STATUS_HIRC48STB_Msk);
+	} else if (DT_ENUM_IDX(DT_NODELABEL(scc), hirc48) == NUMAKER_SCC_CLKSW_DISABLE) {
+		CLK_DisableXtalRC(CLK_PWRCTL_HIRC48EN_Msk);
+	}
+#endif
+
+#if DT_NODE_HAS_PROP(DT_NODELABEL(scc), clk_pclkdiv)
+	/* Set CLK_PCLKDIV register on request */
+	CLK->PCLKDIV = DT_PROP(DT_NODELABEL(scc), clk_pclkdiv);
+#endif
+
+#if DT_NODE_HAS_PROP(DT_NODELABEL(scc), core_clock)
+	/* Set core clock (HCLK) on request */
+	CLK_SetCoreClock(DT_PROP(DT_NODELABEL(scc), core_clock));
+#endif
+
+	/*
+	 * Update System Core Clock
+	 * User can use SystemCoreClockUpdate() to calculate SystemCoreClock.
+	 */
+	SystemCoreClockUpdate();
+
+	/* Lock protected registers */
+	SYS_LockReg();
+}

soc/nuvoton/numaker/m2l31x/soc.h

@@ -0,0 +1,13 @@
+/*
+ * Copyright (c) 2024 Nuvoton Technology Corporation.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef ZEPHYR_SOC_ARM_NUVOTON_M2L31X_SOC_H_
+#define ZEPHYR_SOC_ARM_NUVOTON_M2L31X_SOC_H_
+
+/* Hardware and starter kit includes. */
+#include <NuMicro.h>
+
+#endif /* ZEPHYR_SOC_ARM_NUVOTON_M2L31X_SOC_H_*/

soc/nuvoton/numaker/soc.yml

@@ -4,3 +4,6 @@ family:
   - name: m46x
     socs:
     - name: m467
+  - name: m2l31x
+    socs:
+    - name: m2l31xxx