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/m68k/cpu/mcf530x/cpu.c

@@ -0,0 +1,36 @@
+/*
+ * (C) Copyright 2014  Angelo Dureghello <angelo@sysam.it>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ */
+
+#include <common.h>
+#include <asm/immap.h>
+#include <asm/io.h>
+
+#ifdef CONFIG_M5307
+int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
+{
+	sim_t *sim = (sim_t *)(MMAP_SIM);
+
+	/* enable watchdog/reset, set timeout to 0 and wait */
+	out_8(&sim->sypcr, SYPCR_SWE | SYPCR_SWRI);
+
+	/* wait for watchdog reset */
+	for (;;)
+		;
+
+	/* we don't return! */
+	return 0;
+}
+
+int checkcpu(void)
+{
+	char buf[32];
+
+	printf("CPU:   Freescale Coldfire MCF5307 at %s MHz\n",
+	       strmhz(buf, CONFIG_SYS_CPU_CLK));
+	return 0;
+}
+#endif