* Dirk Eibach, Guntermann & Drunck GmbH, eibach@gdsys.de
* based on lm75.c by Bill Hunter
*
- * 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
+ * SPDX-License-Identifier: GPL-2.0+
*/
/*
- * National LM63 Temperature Sensor
+ * National LM63/LM64 Temperature Sensor
+ * Main difference: LM 64 has -16 Kelvin temperature offset
*/
#include <common.h>
#include <i2c.h>
#include <dtt.h>
-#define DTT_I2C_DEV_CODE 0x4C /* National LM63 device */
+#define DTT_I2C_LM63_ADDR 0x4C /* National LM63 device */
#define DTT_READ_TEMP_RMT_MSB 0x01
#define DTT_CONFIG 0x03
/*
* Calculate sensor address and register.
*/
- sensor = DTT_I2C_DEV_CODE; /* address of lm63 is not adjustable */
+ if (!sensor)
+ sensor = DTT_I2C_LM63_ADDR; /* legacy config */
dlen = 1;
/*
* Calculate sensor address and register.
*/
- sensor = DTT_I2C_DEV_CODE; /* address of lm63 is not adjustable */
+ if (!sensor)
+ sensor = DTT_I2C_LM63_ADDR; /* legacy config */
dlen = 1;
data[0] = (char)(val & 0xff);
return 0;
} /* dtt_write() */
-static int _dtt_init(int sensor)
+static int is_lm64(int sensor)
+{
+ return sensor && (sensor != DTT_I2C_LM63_ADDR);
+}
+
+int dtt_init_one(int sensor)
{
int i;
int val;
if (dtt_write(sensor, DTT_TACHLIM_MSB, (val >> 8) & 0xff) != 0)
return 1;
+ /*
+ * Make sure PWM Lookup-Table is writeable
+ */
+ if (dtt_write(sensor, DTT_FAN_CONFIG, 0x20) != 0)
+ return 1;
+
/*
* Setup PWM Lookup-Table
*/
- for (i = 0; i < sizeof(pwm_lookup) / sizeof(struct pwm_lookup_entry);
- i++) {
+ for (i = 0; i < ARRAY_SIZE(pwm_lookup); i++) {
int address = DTT_PWM_LOOKUP_BASE + 2 * i;
val = pwm_lookup[i].temp;
+ if (is_lm64(sensor))
+ val -= 16;
if (dtt_write(sensor, address, val) != 0)
return 1;
+ val = dtt_read(sensor, address);
val = pwm_lookup[i].pwm;
if (dtt_write(sensor, address + 1, val) != 0)
return 1;
s16 temp = (dtt_read(sensor, DTT_READ_TEMP_RMT_MSB) << 8)
| (dtt_read(sensor, DTT_READ_TEMP_RMT_LSB));
+ if (is_lm64(sensor))
+ temp += 16 << 8;
+
/* Ignore LSB for now, U-Boot only prints natural numbers */
return temp >> 8;
}
-
-int dtt_init(void)
-{
- int i;
- unsigned char sensors[] = CONFIG_DTT_SENSORS;
- const char *const header = "DTT: ";
-
- for (i = 0; i < sizeof(sensors); i++) {
- if (_dtt_init(sensors[i]) != 0)
- printf("%s%d FAILED INIT\n", header, i + 1);
- else
- printf("%s%d is %i C\n", header, i + 1,
- dtt_get_temp(sensors[i]));
- }
-
- return 0;
-}