text: /*
   * (C) Copyright 2008
   * Ricado Ribalda-Universidad Autonoma de Madrid, ricardo.ribalda@uam.es
   * This work has been supported by: QTechnology  http://qtec.com/
   * This program is free software: you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation, either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   * You should have received a copy of the GNU General Public License
   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
  
  #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;
  }
  