soc: arm: gigadevice: add support for GD32F3X0 SoCs

Add support for GigaDevice GD32F3X0 series.

Signed-off-by: HaiLong Yang <cameledyang@pm.me>

soc/arm/gigadevice/common/pinctrl_soc.h

@@ -106,12 +106,19 @@ typedef uint32_t pinctrl_soc_pin_t;
 #ifdef CONFIG_PINCTRL_GD32_AF
 /** Maximum 2MHz */
 #define GD32_OSPEED_2MHZ 0U
+#ifdef CONFIG_SOC_SERIES_GD32F3X0
+/** Maximum 10MHz */
+#define GD32_OSPEED_10MHZ 1U
+/** Maximum 50MHz */
+#define GD32_OSPEED_50MHZ 3U
+#else
 /** Maximum 25MHz */
 #define GD32_OSPEED_25MHZ 1U
 /** Maximum 50MHz */
 #define GD32_OSPEED_50MHZ 2U
 /** Maximum 200MHz */
 #define GD32_OSPEED_200MHZ 3U
+#endif /* CONFIG_SOC_SERIES_GD32F3X0 */
 #else
 /** Maximum 10MHz */
 #define GD32_OSPEED_10MHZ 0U

soc/arm/gigadevice/gd32f3x0/CMakeLists.txt

@@ -0,0 +1,5 @@
+# Copyright (c) 2021 BrainCo Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+zephyr_include_directories(.)
+zephyr_sources(soc.c)

soc/arm/gigadevice/gd32f3x0/Kconfig.defconfig.gd32f350

@@ -0,0 +1,11 @@
+# Copyright (c) 2021 BrainCo Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC
+	default "gd32f350"
+
+config SYS_CLOCK_HW_CYCLES_PER_SEC
+	default $(dt_node_int_prop_int,/cpus/cpu@0,clock-frequency)
+
+config NUM_IRQS
+	default 68

soc/arm/gigadevice/gd32f3x0/Kconfig.defconfig.series

@@ -0,0 +1,11 @@
+# Copyright (c) 2021 BrainCo Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+if SOC_SERIES_GD32F3X0
+
+source "soc/arm/gigadevice/gd32f3x0/Kconfig.defconfig.gd32*"
+
+config SOC_SERIES
+	default "gd32f3x0"
+
+endif # SOC_SERIES_GD32F3X0

soc/arm/gigadevice/gd32f3x0/Kconfig.series

@@ -0,0 +1,12 @@
+# Copyright (c) 2021 BrainCo Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+config SOC_SERIES_GD32F3X0
+	bool "GigaDevice GD32F3X0 series Cortex-M4F MCU"
+	select ARM
+	select CPU_HAS_FPU
+	select CPU_CORTEX_M4
+	select SOC_FAMILY_GD32_ARM
+	select GD32_HAS_AF_PINMUX
+	help
+	  Enable support for GigaDevice GD32F3X0 MCU series

soc/arm/gigadevice/gd32f3x0/Kconfig.soc

@@ -0,0 +1,10 @@
+# Copyright (c) 2021 BrainCo Inc.
+# SPDX-License-Identifier: Apache-2.0
+
+choice
+	prompt "GigaDevice GD32F3X0 MCU Selection"
+	depends on SOC_SERIES_GD32F3X0
+
+	config SOC_GD32F350
+		bool "gd32f350"
+endchoice

soc/arm/gigadevice/gd32f3x0/linker.ld

@@ -0,0 +1,6 @@
+/*
+ * Copyright (c) 2021 BrainCo Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <arch/arm/aarch32/cortex_m/scripts/linker.ld>

soc/arm/gigadevice/gd32f3x0/soc.c

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) Copyright (c) 2021 BrainCo Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <device.h>
+#include <init.h>
+#include <soc.h>
+
+static int gd32f3x0_init(const struct device *dev)
+{
+	uint32_t key;
+
+	ARG_UNUSED(dev);
+
+	key = irq_lock();
+
+	SystemInit();
+	NMI_INIT();
+
+	irq_unlock(key);
+
+	return 0;
+}
+
+SYS_INIT(gd32f3x0_init, PRE_KERNEL_1, 0);

soc/arm/gigadevice/gd32f3x0/soc.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (c) 2021 BrainCo Inc.
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef _SOC_ARM_GIGADEVICE_GD32F3X0_SOC_H_
+#define _SOC_ARM_GIGADEVICE_GD32F3X0_SOC_H_
+
+#ifndef _ASMLANGUAGE
+
+#include <devicetree.h>
+#include <gd32f3x0.h>
+
+#endif /* _ASMLANGUAGE */
+
+#endif /* _SOC_ARM_GIGADEVICE_GD32F3X0_SOC_H_ */