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/arch/arm/mach-uniphier/early-pinctrl/early-pinctrl-sld3.c

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include "../init.h"
+#include "../sg-regs.h"
+
+int uniphier_sld3_early_pin_init(const struct uniphier_board_data *bd)
+{
+	/* Comment format:    PAD Name -> Function Name */
+
+#ifdef CONFIG_UNIPHIER_SERIAL
+	sg_set_pinsel(63, 0, 4, 4);	/* RXD0 */
+	sg_set_pinsel(64, 1, 4, 4);	/* TXD0 */
+
+	sg_set_pinsel(65, 0, 4, 4);	/* RXD1 */
+	sg_set_pinsel(66, 1, 4, 4);	/* TXD1 */
+
+	sg_set_pinsel(96, 2, 4, 4);	/* RXD2 */
+	sg_set_pinsel(102, 2, 4, 4);	/* TXD2 */
+#endif
+
+	sg_set_pinsel(99, 1, 4, 4);	/* GPIO26 -> EA24 */
+
+	return 0;
+}