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-s5pc1xx/include/mach/watchdog.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ * Heungjun Kim <riverful.kim@samsung.com>
+ * Minkyu Kang <mk7.kang@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_ARM_ARCH_WATCHDOG_H_
+#define __ASM_ARM_ARCH_WATCHDOG_H_
+
+#define WTCON_RESET_OFFSET	0
+#define WTCON_INTEN_OFFSET	2
+#define WTCON_CLKSEL_OFFSET	3
+#define WTCON_EN_OFFSET		5
+#define WTCON_PRE_OFFSET	8
+
+#define WTCON_CLK_16		0x0
+#define WTCON_CLK_32		0x1
+#define WTCON_CLK_64		0x2
+#define WTCON_CLK_128		0x3
+
+#define WTCON_CLK(x)		((x & 0x3) << WTCON_CLKSEL_OFFSET)
+#define WTCON_PRESCALER(x)	((x) << WTCON_PRE_OFFSET)
+#define WTCON_EN		(0x1 << WTCON_EN_OFFSET)
+#define WTCON_RESET		(0x1 << WTCON_RESET_OFFSET)
+#define WTCON_INT		(0x1 << WTCON_INTEN_OFFSET)
+
+#ifndef __ASSEMBLY__
+struct s5p_watchdog {
+	unsigned int wtcon;
+	unsigned int wtdat;
+	unsigned int wtcnt;
+	unsigned int wtclrint;
+};
+
+/* functions */
+void wdt_stop(void);
+void wdt_start(unsigned int timeout);
+#endif	/* __ASSEMBLY__ */
+
+#endif