arch: arm: stm32: add basic support for STM32F723 SoC

The STM32F723 has more interrupts than the STM32F746 due to the
additional SDMMC controller. Besides that the changes are very
similar to the ones of the STM32F746.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

arch/arm/soc/st_stm32/stm32f7/Kconfig.defconfig.stm32f723xe

@@ -0,0 +1,18 @@
+# Kconfig - ST STM32F723XE MCU configuration options
+#
+# Copyright (c) 2018 Aurelien Jarno
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+if SOC_STM32F723XE
+
+config SOC
+	string
+	default "stm32f723xx"
+
+config NUM_IRQS
+	int
+	default 104
+
+endif # SOC_STM32F723XE

arch/arm/soc/st_stm32/stm32f7/Kconfig.soc

@@ -9,6 +9,9 @@ choice
 prompt "STM32F7x MCU Selection"
 depends on SOC_SERIES_STM32F7X
 
+config SOC_STM32F723XE
+	bool "STM32F723XE"
+
 config SOC_STM32F746XG
 	bool "STM32F746XG"
 

dts/arm/st/mem.h

@@ -85,6 +85,9 @@
 #define DT_FLASH_SIZE		__SIZE_K(2048)
 #define DT_SRAM_SIZE		__SIZE_K(384)
 #define DT_CCM_SIZE		__SIZE_K(64)
+#elif defined(CONFIG_SOC_STM32F723XE)
+#define DT_FLASH_SIZE		__SIZE_K(512)
+#define DT_SRAM_SIZE		__SIZE_K(256)
 #elif defined(CONFIG_SOC_STM32F746XG)
 #define DT_FLASH_SIZE		__SIZE_K(1024)
 #define DT_SRAM_SIZE		__SIZE_K(320)

dts/arm/st/stm32f723.dtsi

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2018 Aurelien Jarno
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <st/stm32f7.dtsi>