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/freescale/common/zm7300.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ */
+
+#ifndef __ZM7300_H_
+#define __ZM7300_H	1_
+
+#include <common.h>
+#include <i2c.h>
+#include <errno.h>
+#include <asm/io.h>
+
+#define ZM_STEP 125
+int zm7300_set_voltage(int voltage_1_10mv);
+int zm_write_voltage(int voltage);
+int zm_read_voltage(void);
+int zm_disable_wp(void);
+int zm_enable_wp(void);
+
+#endif	/* __ZM7300_H_ */