text: /*
   * (C) Copyright 2001
   * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com
   *
   * See file CREDITS for list of people who contributed to this
   * project.
   *
   * 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, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
   * MA 02111-1307 USA
   */
  
  #include <common.h>
  #include <config.h>
  #include <command.h>
  
  #include <dtt.h>
  #include <i2c.h>
  
  static unsigned long sensor_initialized;
  
  static void _initialize_dtt(void)
  {
  	int i;
  	unsigned char sensors[] = CONFIG_DTT_SENSORS;
  
  	for (i = 0; i < sizeof(sensors); i++) {
  		if ((sensor_initialized & (1 << i)) == 0) {
  			if (dtt_init_one(sensors[i]) != 0) {
  				printf("DTT%d: Failed init!\n", i);
  				continue;
  			}
  			sensor_initialized |= (1 << i);
  		}
  	}
  }
  
  void dtt_init(void)
  {
  	int old_bus;
  
  	/* switch to correct I2C bus */
  	old_bus = I2C_GET_BUS();
  	I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
  
  	_initialize_dtt();
  
  	/* switch back to original I2C bus */
  	I2C_SET_BUS(old_bus);
  }
  
  int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
  {
  	int i;
  	unsigned char sensors[] = CONFIG_DTT_SENSORS;
  	int old_bus;
  
  	/* Force a compilation error, if there are more then 32 sensors */
  	BUILD_BUG_ON(sizeof(sensors) > 32);
  	/* switch to correct I2C bus */
  	old_bus = I2C_GET_BUS();
  	I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
  
  	_initialize_dtt();
  
  	/*
  	 * Loop through sensors, read
  	 * temperature, and output it.
  	 */
  	for (i = 0; i < sizeof(sensors); i++)
  		printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
  
  	/* switch back to original I2C bus */
  	I2C_SET_BUS(old_bus);
  
  	return 0;
  }	/* do_dtt() */
  
  /***************************************************/
  
  U_BOOT_CMD(
  	  dtt,	1,	1,	do_dtt,
  	  "Read temperature from Digital Thermometer and Thermostat",
  	  ""
  );
  