ARM: stm32: Supply a DTS file for the STM32F469 Discovery board

It's pretty similar to the STM32F429, but there are some
subtle changes required to boot successfully.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>

arch/arm/boot/dts/Makefile

@@ -611,6 +611,7 @@ dtb-$(CONFIG_ARCH_STI) += \
 	stih418-b2199.dtb
 dtb-$(CONFIG_ARCH_STM32)+= \
 	stm32f429-disco.dtb \
+	stm32f469-disco.dtb \
 	stm32429i-eval.dtb
 dtb-$(CONFIG_MACH_SUN4I) += \
 	sun4i-a10-a1000.dtb \

arch/arm/boot/dts/stm32f469-disco.dts

+/*
+ * Copyright 2016 - Lee Jones <lee.jones@linaro.org>
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This file is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of the
+ *     License, or (at your option) any later version.
+ *
+ *     This file is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ *     You should have received a copy of the GNU General Public
+ *     License along with this file; if not, write to the Free
+ *     Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+ *     MA 02110-1301 USA
+ *
+ * Or, alternatively,
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+/dts-v1/;
+#include "stm32f429.dtsi"
+
+/ {
+	model = "STMicroelectronics STM32F469i-DISCO board";
+	compatible = "st,stm32f469i-disco", "st,stm32f469";
+
+	chosen {
+		bootargs = "root=/dev/ram rdinit=/linuxrc";
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory {
+		reg = <0x00000000 0x800000>;
+	};
+
+	aliases {
+		serial0 = &usart3;
+	};
+};
+
+&clk_hse {
+	clock-frequency = <8000000>;
+};
+
+&usart3 {
+	status = "okay";
+};