avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/sunxi/dram_sun5i_auto.c

@@ -0,0 +1,38 @@
+/* DRAM parameters for auto dram configuration on sun5i and sun7i */
+
+#include <common.h>
+#include <asm/arch/dram.h>
+
+static struct dram_para dram_para = {
+	.clock = CONFIG_DRAM_CLK,
+	.mbus_clock = CONFIG_DRAM_MBUS_CLK,
+	.type = 3,
+	.rank_num = 1,
+	.density = 0,
+	.io_width = 0,
+	.bus_width = 0,
+	.zq = CONFIG_DRAM_ZQ,
+	.odt_en = IS_ENABLED(CONFIG_DRAM_ODT_EN),
+	.size = 0,
+#ifdef CONFIG_DRAM_TIMINGS_VENDOR_MAGIC
+	.cas = 9,
+	.tpr0 = 0x42d899b7,
+	.tpr1 = 0xa090,
+	.tpr2 = 0x22a00,
+	.emr2 = 0x10,
+#else
+#	include "dram_timings_sun4i.h"
+	.active_windowing = 1,
+#endif
+	.tpr3 = CONFIG_DRAM_TPR3,
+	.tpr4 = 0,
+	.tpr5 = 0,
+	.emr1 = CONFIG_DRAM_EMR1,
+	.emr3 = 0,
+	.dqs_gating_delay = CONFIG_DRAM_DQS_GATING_DELAY,
+};
+
+unsigned long sunxi_dram_init(void)
+{
+	return dramc_init(&dram_para);
+}