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/samsung/common/multi_i2c.c

@@ -0,0 +1,59 @@
+/*
+ *  Copyright (C) 2012 Samsung Electronics
+ *  Lukasz Majewski <l.majewski@samsung.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+
+#ifndef CONFIG_SOFT_I2C_I2C10_SCL
+#define CONFIG_SOFT_I2C_I2C10_SCL 0
+#endif
+
+#ifndef CONFIG_SOFT_I2C_I2C10_SDA
+#define CONFIG_SOFT_I2C_I2C10_SDA 0
+#endif
+
+/* Handle multiple I2C buses instances */
+int get_multi_scl_pin(void)
+{
+	unsigned int bus = i2c_get_bus_num();
+
+	switch (bus) {
+	case I2C_0:
+		return CONFIG_SOFT_I2C_I2C5_SCL;
+	case I2C_1:
+		return CONFIG_SOFT_I2C_I2C9_SCL;
+	case I2C_2:
+		return CONFIG_SOFT_I2C_I2C10_SCL;
+	default:
+		printf("I2C_%d not supported!\n", bus);
+	};
+
+	return 0;
+}
+
+int get_multi_sda_pin(void)
+{
+	unsigned int bus = i2c_get_bus_num();
+
+	switch (bus) {
+	case I2C_0:
+		return CONFIG_SOFT_I2C_I2C5_SDA;
+	case I2C_1:
+		return CONFIG_SOFT_I2C_I2C9_SDA;
+	case I2C_2:
+		return CONFIG_SOFT_I2C_I2C10_SDA;
+	default:
+		printf("I2C_%d not supported!\n", bus);
+	};
+
+	return 0;
+}
+
+int multi_i2c_init(void)
+{
+	return 0;
+}