b88e7b3cc0
Our boards rely on dtt for initialization of fan hardware. dtt_init() was implemented to be called form board specific code. Signed-off-by: Dirk Eibach <eibach@gdsys.de> Acked-by: Heiko Schocher <hs@denx.de> Tested-by: Heiko Schocher <hs@denx.de>
97 lines
2.3 KiB
C
97 lines
2.3 KiB
C
/*
|
|
* (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",
|
|
""
|
|
);
|