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/compulab/common/common.c

@@ -0,0 +1,59 @@
+/*
+ * (C) Copyright 2014 CompuLab, Ltd. <www.compulab.co.il>
+ *
+ * Authors: Igor Grinberg <grinberg@compulab.co.il>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/bootm.h>
+#include <asm/gpio.h>
+
+#include "common.h"
+#include "eeprom.h"
+
+void cl_print_pcb_info(void)
+{
+	u32 board_rev = get_board_rev();
+	u32 rev_major = board_rev / 100;
+	u32 rev_minor = board_rev - (rev_major * 100);
+
+	if ((rev_minor / 10) * 10 == rev_minor)
+		rev_minor = rev_minor / 10;
+
+	printf("PCB:   %u.%u\n", rev_major, rev_minor);
+}
+
+#ifdef CONFIG_SERIAL_TAG
+void __weak get_board_serial(struct tag_serialnr *serialnr)
+{
+	/*
+	 * This corresponds to what happens when we can communicate with the
+	 * eeprom but don't get a valid board serial value.
+	 */
+	serialnr->low = 0;
+	serialnr->high = 0;
+};
+#endif
+
+#ifdef CONFIG_CMD_USB
+int cl_usb_hub_init(int gpio, const char *label)
+{
+	if (gpio_request(gpio, label)) {
+		printf("Error: can't obtain GPIO%d for %s", gpio, label);
+		return -1;
+	}
+
+	gpio_direction_output(gpio, 0);
+	udelay(10);
+	gpio_set_value(gpio, 1);
+	udelay(1000);
+	return 0;
+}
+
+void cl_usb_hub_deinit(int gpio)
+{
+	gpio_free(gpio);
+}
+#endif