board: stm32: add stm32f469-discovery board support

This board offers :

 _ STM32F469NIH6 microcontroller featuring 2 Mbytes of Flash memory
   and 324 Kbytes of RAM in BGA216 package
 _ On-board ST-LINK/V2-1 SWD debugger, supporting USB reenumeration capability:
     _ Mbed-enabled (mbed.org)
     _ USB functions: USB virtual COM port, mass storage, debug port
 _ 4 inches 800x480 pixel TFT color LCD with MIPI DSI interface and capacitive
   touch screen
 _ SAI Audio DAC, with a stereo headphone output jack
 _ 3 MEMS microphones
 _ MicroSD card connector
 _ I2C extension connector
 _ 4Mx32bit SDRAM
 _ 128-Mbit Quad-SPI NOR Flash
 _ Reset and wake-up buttons
 _ 4 color user LEDs
 _ USB OTG FS with Micro-AB connector
 _ Three power supply options:
 _ Expansion connectors and Arduinoâ„¢ UNO V3 connectors

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/include/configs/stm32f469-discovery.h b/include/configs/stm32f469-discovery.h
new file mode 100644
index 0000000..1409999
--- /dev/null
+++ b/include/configs/stm32f469-discovery.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) STMicroelectronics SA 2017
+ * Author(s): Patrice CHOTARD, <patrice.chotard@st.com> for STMicroelectronics.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __CONFIG_H
+#define __CONFIG_H
+
+#define CONFIG_STM32F4DISCOVERY
+
+#define CONFIG_MISC_INIT_R
+
+#define CONFIG_SYS_FLASH_BASE		0x08000000
+
+#define CONFIG_SYS_INIT_SP_ADDR		0x10010000
+#define CONFIG_SYS_TEXT_BASE		0x08000000
+
+#define CONFIG_SYS_ICACHE_OFF
+#define CONFIG_SYS_DCACHE_OFF
+
+/*
+ * Configuration of the external SDRAM memory
+ */
+#define CONFIG_NR_DRAM_BANKS		1
+#define CONFIG_SYS_RAM_FREQ_DIV		2
+#define CONFIG_SYS_RAM_BASE		0x00000000
+#define CONFIG_SYS_SDRAM_BASE		CONFIG_SYS_RAM_BASE
+#define CONFIG_SYS_LOAD_ADDR		0x00400000
+#define CONFIG_LOADADDR			0x00400000
+
+#define CONFIG_SYS_MAX_FLASH_SECT	12
+#define CONFIG_SYS_MAX_FLASH_BANKS	2
+
+#define CONFIG_ENV_OFFSET		(256 << 10)
+#define CONFIG_ENV_SECT_SIZE		(128 << 10)
+#define CONFIG_ENV_SIZE			(8 << 10)
+
+#define CONFIG_STM32_FLASH
+
+#define CONFIG_STM32_HSE_HZ		8000000
+#define CONFIG_SYS_CLK_FREQ		180000000 /* 180 MHz */
+#define CONFIG_SYS_HZ_CLOCK		1000000	/* Timer is clocked at 1MHz */
+
+#define CONFIG_CMDLINE_TAG
+#define CONFIG_SETUP_MEMORY_TAGS
+#define CONFIG_INITRD_TAG
+#define CONFIG_REVISION_TAG
+
+#define CONFIG_SYS_CBSIZE		1024
+
+#define CONFIG_SYS_MALLOC_LEN		(1 * 1024 * 1024)
+
+#define CONFIG_BOOTCOMMAND						\
+	"run boot_sd"
+
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	"boot_sd=mmc dev 0;fatload mmc 0 0x00700000 stm32f469-disco.dtb; fatload mmc 0 0x00008000 zImage; icache off; bootz 0x00008000 - 0x00700000"
+
+/*
+ * Command line configuration.
+ */
+#define CONFIG_SYS_LONGHELP
+#define CONFIG_AUTO_COMPLETE
+#define CONFIG_CMDLINE_EDITING
+
+#endif /* __CONFIG_H */