hwmon: Driver for TI TMP103 temperature sensor
Driver for the TI TMP103. The TI TMP103 is similar to the TMP102. It differs from the TMP102 by having only 8 bit registers. Signed-off-by: Heiko Schocher <hs@denx.de> [linux@roeck-us.net: Select REGMAP_I2C in Kconfig] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Heiko Schocher
Guenter Roeck
parent
49153b092c
commit
d17a7dca04
|
|
@ -83,5 +83,6 @@ stm,m41t80 M41T80 - SERIAL ACCESS RTC WITH ALARMS
|
|||
taos,tsl2550 Ambient Light Sensor with SMBUS/Two Wire Serial Interface
|
||||
ti,tsc2003 I2C Touch-Screen Controller
|
||||
ti,tmp102 Low Power Digital Temperature Sensor with SMBUS/Two Wire Serial Interface
|
||||
ti,tmp103 Low Power Digital Temperature Sensor with SMBUS/Two Wire Serial Interface
|
||||
ti,tmp275 Digital Temperature Sensor
|
||||
winbond,wpct301 i2c trusted platform module (TPM)
|
||||
|
|
|
|||
|
|
@ -0,0 +1,28 @@
|
|||
Kernel driver tmp103
|
||||
====================
|
||||
|
||||
Supported chips:
|
||||
* Texas Instruments TMP103
|
||||
Prefix: 'tmp103'
|
||||
Addresses scanned: none
|
||||
Product info and datasheet: http://www.ti.com/product/tmp103
|
||||
|
||||
Author:
|
||||
Heiko Schocher <hs@denx.de>
|
||||
|
||||
Description
|
||||
-----------
|
||||
|
||||
The TMP103 is a digital output temperature sensor in a four-ball
|
||||
wafer chip-scale package (WCSP). The TMP103 is capable of reading
|
||||
temperatures to a resolution of 1°C. The TMP103 is specified for
|
||||
operation over a temperature range of –40°C to +125°C.
|
||||
|
||||
Resolution: 8 Bits
|
||||
Accuracy: ±1°C Typ (–10°C to +100°C)
|
||||
|
||||
The driver provides the common sysfs-interface for temperatures (see
|
||||
Documentation/hwmon/sysfs-interface under Temperatures).
|
||||
|
||||
Please refer how to instantiate this driver:
|
||||
Documentation/i2c/instantiating-devices
|
||||
|
|
@ -1405,6 +1405,17 @@ config SENSORS_TMP102
|
|||
This driver can also be built as a module. If so, the module
|
||||
will be called tmp102.
|
||||
|
||||
config SENSORS_TMP103
|
||||
tristate "Texas Instruments TMP103"
|
||||
depends on I2C
|
||||
select REGMAP_I2C
|
||||
help
|
||||
If you say yes here you get support for Texas Instruments TMP103
|
||||
sensor chips.
|
||||
|
||||
This driver can also be built as a module. If so, the module
|
||||
will be called tmp103.
|
||||
|
||||
config SENSORS_TMP401
|
||||
tristate "Texas Instruments TMP401 and compatibles"
|
||||
depends on I2C
|
||||
|
|
|
|||
|
|
@ -136,6 +136,7 @@ obj-$(CONFIG_SENSORS_SMSC47M192)+= smsc47m192.o
|
|||
obj-$(CONFIG_SENSORS_AMC6821) += amc6821.o
|
||||
obj-$(CONFIG_SENSORS_THMC50) += thmc50.o
|
||||
obj-$(CONFIG_SENSORS_TMP102) += tmp102.o
|
||||
obj-$(CONFIG_SENSORS_TMP103) += tmp103.o
|
||||
obj-$(CONFIG_SENSORS_TMP401) += tmp401.o
|
||||
obj-$(CONFIG_SENSORS_TMP421) += tmp421.o
|
||||
obj-$(CONFIG_SENSORS_TWL4030_MADC)+= twl4030-madc-hwmon.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,205 @@
|
|||
/*
|
||||
* Texas Instruments TMP103 SMBus temperature sensor driver
|
||||
* Copyright (C) 2014 Heiko Schocher <hs@denx.de>
|
||||
*
|
||||
* Based on:
|
||||
* Texas Instruments TMP102 SMBus temperature sensor driver
|
||||
*
|
||||
* Copyright (C) 2010 Steven King <sfking@fdwdc.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.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/module.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/i2c.h>
|
||||
#include <linux/hwmon.h>
|
||||
#include <linux/hwmon-sysfs.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/jiffies.h>
|
||||
#include <linux/regmap.h>
|
||||
|
||||
#define TMP103_TEMP_REG 0x00
|
||||
#define TMP103_CONF_REG 0x01
|
||||
#define TMP103_TLOW_REG 0x02
|
||||
#define TMP103_THIGH_REG 0x03
|
||||
|
||||
#define TMP103_CONF_M0 0x01
|
||||
#define TMP103_CONF_M1 0x02
|
||||
#define TMP103_CONF_LC 0x04
|
||||
#define TMP103_CONF_FL 0x08
|
||||
#define TMP103_CONF_FH 0x10
|
||||
#define TMP103_CONF_CR0 0x20
|
||||
#define TMP103_CONF_CR1 0x40
|
||||
#define TMP103_CONF_ID 0x80
|
||||
#define TMP103_CONF_SD (TMP103_CONF_M1)
|
||||
#define TMP103_CONF_SD_MASK (TMP103_CONF_M0 | TMP103_CONF_M1)
|
||||
|
||||
#define TMP103_CONFIG (TMP103_CONF_CR1 | TMP103_CONF_M1)
|
||||
#define TMP103_CONFIG_MASK (TMP103_CONF_CR0 | TMP103_CONF_CR1 | \
|
||||
TMP103_CONF_M0 | TMP103_CONF_M1)
|
||||
|
||||
static inline int tmp103_reg_to_mc(s8 val)
|
||||
{
|
||||
return val * 1000;
|
||||
}
|
||||
|
||||
static inline u8 tmp103_mc_to_reg(int val)
|
||||
{
|
||||
return DIV_ROUND_CLOSEST(val, 1000);
|
||||
}
|
||||
|
||||
static ssize_t tmp103_show_temp(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
|
||||
struct regmap *regmap = dev_get_drvdata(dev);
|
||||
unsigned int regval;
|
||||
int ret;
|
||||
|
||||
ret = regmap_read(regmap, sda->index, ®val);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
return sprintf(buf, "%d\n", tmp103_reg_to_mc(regval));
|
||||
}
|
||||
|
||||
static ssize_t tmp103_set_temp(struct device *dev,
|
||||
struct device_attribute *attr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
struct sensor_device_attribute *sda = to_sensor_dev_attr(attr);
|
||||
struct regmap *regmap = dev_get_drvdata(dev);
|
||||
long val;
|
||||
int ret;
|
||||
|
||||
if (kstrtol(buf, 10, &val) < 0)
|
||||
return -EINVAL;
|
||||
|
||||
val = clamp_val(val, -55000, 127000);
|
||||
ret = regmap_write(regmap, sda->index, tmp103_mc_to_reg(val));
|
||||
return ret ? ret : count;
|
||||
}
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, tmp103_show_temp, NULL ,
|
||||
TMP103_TEMP_REG);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, tmp103_show_temp,
|
||||
tmp103_set_temp, TMP103_TLOW_REG);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, tmp103_show_temp,
|
||||
tmp103_set_temp, TMP103_THIGH_REG);
|
||||
|
||||
static struct attribute *tmp103_attrs[] = {
|
||||
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
||||
NULL
|
||||
};
|
||||
ATTRIBUTE_GROUPS(tmp103);
|
||||
|
||||
static bool tmp103_regmap_is_volatile(struct device *dev, unsigned int reg)
|
||||
{
|
||||
return reg == TMP103_TEMP_REG;
|
||||
}
|
||||
|
||||
static struct regmap_config tmp103_regmap_config = {
|
||||
.reg_bits = 8,
|
||||
.val_bits = 8,
|
||||
.max_register = TMP103_THIGH_REG,
|
||||
.volatile_reg = tmp103_regmap_is_volatile,
|
||||
};
|
||||
|
||||
static int tmp103_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct device *dev = &client->dev;
|
||||
struct device *hwmon_dev;
|
||||
struct regmap *regmap;
|
||||
int ret;
|
||||
|
||||
if (!i2c_check_functionality(client->adapter,
|
||||
I2C_FUNC_SMBUS_BYTE_DATA)) {
|
||||
dev_err(&client->dev,
|
||||
"adapter doesn't support SMBus byte transactions\n");
|
||||
return -ENODEV;
|
||||
}
|
||||
|
||||
regmap = devm_regmap_init_i2c(client, &tmp103_regmap_config);
|
||||
if (IS_ERR(regmap)) {
|
||||
dev_err(dev, "failed to allocate register map\n");
|
||||
return PTR_ERR(regmap);
|
||||
}
|
||||
|
||||
ret = regmap_update_bits(regmap, TMP103_CONF_REG, TMP103_CONFIG_MASK,
|
||||
TMP103_CONFIG);
|
||||
if (ret < 0) {
|
||||
dev_err(&client->dev, "error writing config register\n");
|
||||
return ret;
|
||||
}
|
||||
|
||||
hwmon_dev = hwmon_device_register_with_groups(dev, client->name,
|
||||
regmap, tmp103_groups);
|
||||
return PTR_ERR_OR_ZERO(hwmon_dev);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_PM
|
||||
static int tmp103_suspend(struct device *dev)
|
||||
{
|
||||
struct regmap *regmap = dev_get_drvdata(dev);
|
||||
|
||||
return regmap_update_bits(regmap, TMP103_CONF_REG,
|
||||
TMP103_CONF_SD_MASK, 0);
|
||||
}
|
||||
|
||||
static int tmp103_resume(struct device *dev)
|
||||
{
|
||||
struct regmap *regmap = dev_get_drvdata(dev);
|
||||
|
||||
return regmap_update_bits(regmap, TMP103_CONF_REG,
|
||||
TMP103_CONF_SD_MASK, TMP103_CONF_SD);
|
||||
}
|
||||
|
||||
static const struct dev_pm_ops tmp103_dev_pm_ops = {
|
||||
.suspend = tmp103_suspend,
|
||||
.resume = tmp103_resume,
|
||||
};
|
||||
|
||||
#define TMP103_DEV_PM_OPS (&tmp103_dev_pm_ops)
|
||||
#else
|
||||
#define TMP103_DEV_PM_OPS NULL
|
||||
#endif /* CONFIG_PM */
|
||||
|
||||
static const struct i2c_device_id tmp103_id[] = {
|
||||
{ "tmp103", 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, tmp103_id);
|
||||
|
||||
static struct i2c_driver tmp103_driver = {
|
||||
.driver = {
|
||||
.name = "tmp103",
|
||||
.pm = TMP103_DEV_PM_OPS,
|
||||
},
|
||||
.probe = tmp103_probe,
|
||||
.id_table = tmp103_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(tmp103_driver);
|
||||
|
||||
MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
|
||||
MODULE_DESCRIPTION("Texas Instruments TMP103 temperature sensor driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue