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/drivers/hwmon/adt7460.c

@@ -0,0 +1,73 @@
+/*
+ * (C) Copyright 2008
+ * Ricado Ribalda-Universidad Autonoma de Madrid, ricardo.ribalda@gmail.com
+ * This work has been supported by: QTechnology  http://qtec.com/
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <dtt.h>
+
+#define ADT7460_ADDRESS		0x2c
+#define ADT7460_INVALID		128
+#define ADT7460_CONFIG		0x40
+#define ADT7460_REM1_TEMP	0x25
+#define ADT7460_LOCAL_TEMP	0x26
+#define ADT7460_REM2_TEMP	0x27
+
+int dtt_read(int sensor, int reg)
+{
+	u8 dir = reg;
+	u8 data;
+
+	if (i2c_read(ADT7460_ADDRESS, dir, 1, &data, 1) == -1)
+		return -1;
+	if (data == ADT7460_INVALID)
+		return -1;
+
+	return data;
+}
+
+int dtt_write(int sensor, int reg, int val)
+{
+	u8 dir = reg;
+	u8 data = val;
+
+	if (i2c_write(ADT7460_ADDRESS, dir, 1, &data, 1) == -1)
+		return -1;
+
+	return 0;
+}
+
+int dtt_init_one(int sensor)
+{
+	printf("ADT7460 at I2C address 0x%2x\n", ADT7460_ADDRESS);
+
+	if (dtt_write(0, ADT7460_CONFIG, 1) == -1) {
+		puts("Error initialiting ADT7460\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+int dtt_get_temp(int sensor)
+{
+	int aux;
+	u8 table[] =
+	    { ADT7460_REM1_TEMP, ADT7460_LOCAL_TEMP, ADT7460_REM2_TEMP };
+
+	if (sensor > 2) {
+		puts("DTT sensor does not exist\n");
+		return -1;
+	}
+
+	aux = dtt_read(0, table[sensor]);
+	if (aux == -1) {
+		puts("DTT temperature read failed\n");
+		return -1;
+	}
+
+	return aux;
+}