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/*
* (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;
}
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