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dtt: add ds620 support

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Signed-off-by: Albert ARIBAUD (3ADEV) <albert.aribaud@3adev.fr>
This commit is contained in:
Albert ARIBAUD \(3ADEV\) 2015-03-31 11:40:48 +02:00 committed by Albert ARIBAUD
parent 981219eebe
commit 24d528e3fa
3 changed files with 74 additions and 7 deletions
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1
drivers/hwmon/Makefile
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@ -15,6 +15,7 @@ obj-$(CONFIG_DTT_ADT7460) += adt7460.o
obj-$(CONFIG_DTT_DS1621) += ds1621.o
obj-$(CONFIG_DTT_DS1722) += ds1722.o
obj-$(CONFIG_DTT_DS1775) += ds1775.o
obj-$(CONFIG_DTT_DS620) += ds620.o
obj-$(CONFIG_DTT_LM63) += lm63.o
obj-$(CONFIG_DTT_LM73) += lm73.o
obj-$(CONFIG_DTT_LM75) += lm75.o

65
drivers/hwmon/ds620.c Normal file
View file

@ -0,0 +1,65 @@
/*
* DS620 DTT support
*
* (C) Copyright 2014 3ADEV <http://www.3adev.com>
* Written-by: Albert ARIBAUD <albert.aribaud@3adev.fr>
*
* SPDX-License-Identifier: GPL-2.0+
*/
/*
* Dallas Semiconductor's DS1621/1631 Digital Thermometer and Thermostat.
*/
#include <common.h>
#include <i2c.h>
#include <dtt.h>
/*
* Device code
*/
#define DTT_I2C_DEV_CODE 0x48
#define DTT_START_CONVERT 0x51
#define DTT_TEMP 0xAA
#define DTT_CONFIG 0xAC
/*
* Config register MSB bits
*/
#define DTT_CONFIG_1SHOT 0x01
#define DTT_CONFIG_AUTOC 0x02
#define DTT_CONFIG_R0 0x04 /* always 1 */
#define DTT_CONFIG_R1 0x08 /* always 1 */
#define DTT_CONFIG_TLF 0x10
#define DTT_CONFIG_THF 0x20
#define DTT_CONFIG_NVB 0x40
#define DTT_CONFIG_DONE 0x80
#define CHIP(sensor) (DTT_I2C_DEV_CODE + (sensor & 0x07))
int dtt_init_one(int sensor)
{
uint8_t config = DTT_CONFIG_1SHOT
| DTT_CONFIG_R0
| DTT_CONFIG_R1;
return i2c_write(CHIP(sensor), DTT_CONFIG, 1, &config, 1);
}
int dtt_get_temp(int sensor)
{
uint8_t status;
uint8_t temp[2];
/* Start a conversion, may take up to 1 second. */
i2c_write(CHIP(sensor), DTT_START_CONVERT, 1, NULL, 0);
do {
if (i2c_read(CHIP(sensor), DTT_CONFIG, 1, &status, 1))
/* bail out if I2C error */
status |= DTT_CONFIG_DONE;
} while (!(status & DTT_CONFIG_DONE));
if (i2c_read(CHIP(sensor), DTT_TEMP, 1, temp, 2))
/* bail out if I2C error */
return -274; /* below absolute zero == error */
return ((int16_t)(temp[1] | (temp[0] << 8))) >> 7;
}

15
include/dtt.h
View file

@ -12,13 +12,14 @@
#define _DTT_H_
#if defined(CONFIG_DTT_ADM1021) || \
defined(CONFIG_DTT_ADT7460) || \
defined(CONFIG_DTT_DS1621) || \
defined(CONFIG_DTT_DS1775) || \
defined(CONFIG_DTT_LM63) || \
defined(CONFIG_DTT_LM73) || \
defined(CONFIG_DTT_LM75) || \
defined(CONFIG_DTT_LM81)
defined(CONFIG_DTT_ADT7460) || \
defined(CONFIG_DTT_DS1621) || \
defined(CONFIG_DTT_DS1775) || \
defined(CONFIG_DTT_DS620) || \
defined(CONFIG_DTT_LM63) || \
defined(CONFIG_DTT_LM73) || \
defined(CONFIG_DTT_LM75) || \
defined(CONFIG_DTT_LM81)
#define CONFIG_DTT /* We have a DTT */