Addresses scanned: None
Datasheet: Publicly available at the Analog Devices website
http://www.analog.com/static/imported-files/data_sheets/ADT7420.pdf
+ * Analog Devices ADT7310
+ Prefix: 'adt7310'
+ Addresses scanned: None
+ Datasheet: Publicly available at the Analog Devices website
+ http://www.analog.com/static/imported-files/data_sheets/ADT7310.pdf
+ * Analog Devices ADT7320
+ Prefix: 'adt7320'
+ Addresses scanned: None
+ Datasheet: Publicly available at the Analog Devices website
+ http://www.analog.com/static/imported-files/data_sheets/ADT7320.pdf
Author: Hartmut Knaack <knaack.h@gmx.de>
Description
-----------
-The ADT7410 is a temperature sensor with rated temperature range of -55°C to
-+150°C. It has a high accuracy of +/-0.5°C and can be operated at a resolution
-of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an INT pin to
-indicate that a minimum or maximum temperature set point has been exceeded, as
-well as a critical temperature (CT) pin to indicate that the critical
-temperature set point has been exceeded. Both pins can be set up with a common
-hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events. Both
-pins can individually set to be active-low or active-high, while the whole
-device can either run in comparator mode or interrupt mode. The ADT7410
-supports continous temperature sampling, as well as sampling one temperature
-value per second or even justget one sample on demand for power saving.
-Besides, it can completely power down its ADC, if power management is
-required.
-
-The ADT7420 is register compatible, the only differences being the package,
-a slightly narrower operating temperature range (-40°C to +150°C), and a
-better accuracy (0.25°C instead of 0.50°C.)
+The ADT7310/ADT7410 is a temperature sensor with rated temperature range of
+-55°C to +150°C. It has a high accuracy of +/-0.5°C and can be operated at a
+resolution of 13 bits (0.0625°C) or 16 bits (0.0078°C). The sensor provides an
+INT pin to indicate that a minimum or maximum temperature set point has been
+exceeded, as well as a critical temperature (CT) pin to indicate that the
+critical temperature set point has been exceeded. Both pins can be set up with a
+common hysteresis of 0°C - 15°C and a fault queue, ranging from 1 to 4 events.
+Both pins can individually set to be active-low or active-high, while the whole
+device can either run in comparator mode or interrupt mode. The ADT7410 supports
+continuous temperature sampling, as well as sampling one temperature value per
+second or even just get one sample on demand for power saving. Besides, it can
+completely power down its ADC, if power management is required.
+
+The ADT7320/ADT7420 is register compatible, the only differences being the
+package, a slightly narrower operating temperature range (-40°C to +150°C), and
+a better accuracy (0.25°C instead of 0.50°C.)
+
+The difference between the ADT7310/ADT7320 and ADT7410/ADT7420 is the control
+interface, the ADT7310 and ADT7320 use SPI while the ADT7410 and ADT7420 use
+I2C.
Configuration Notes
-------------------
This driver can also be built as a module. If so, the module
will be called adm9240.
+config SENSORS_ADT7X10
+ tristate
+ help
+ This module contains common code shared by the ADT7310/ADT7320 and
+ ADT7410/ADT7420 temperature monitoring chip drivers.
+
+ If build as a module, the module will be called adt7x10.
+
+config SENSORS_ADT7310
+ tristate "Analog Devices ADT7310/ADT7320"
+ depends on SPI_MASTER
+ select SENSORS_ADT7X10
+ help
+ If you say yes here you get support for the Analog Devices
+ ADT7310 and ADT7320 temperature monitoring chips.
+
+ This driver can also be built as a module. If so, the module
+ will be called adt7310.
+
config SENSORS_ADT7410
tristate "Analog Devices ADT7410/ADT7420"
depends on I2C
+ select SENSORS_ADT7X10
help
If you say yes here you get support for the Analog Devices
ADT7410 and ADT7420 temperature monitoring chips.
obj-$(CONFIG_SENSORS_ADS1015) += ads1015.o
obj-$(CONFIG_SENSORS_ADS7828) += ads7828.o
obj-$(CONFIG_SENSORS_ADS7871) += ads7871.o
+obj-$(CONFIG_SENSORS_ADT7X10) += adt7x10.o
+obj-$(CONFIG_SENSORS_ADT7310) += adt7310.o
obj-$(CONFIG_SENSORS_ADT7410) += adt7410.o
obj-$(CONFIG_SENSORS_ADT7411) += adt7411.o
obj-$(CONFIG_SENSORS_ADT7462) += adt7462.o
--- /dev/null
+/*
+ * ADT7310/ADT7310 digital temperature sensor driver
+ *
+ * Copyright 2012-2013 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/spi/spi.h>
+#include <asm/unaligned.h>
+
+#include "adt7x10.h"
+
+#define ADT7310_STATUS 0
+#define ADT7310_CONFIG 1
+#define ADT7310_TEMPERATURE 2
+#define ADT7310_ID 3
+#define ADT7310_T_CRIT 4
+#define ADT7310_T_HYST 5
+#define ADT7310_T_ALARM_HIGH 6
+#define ADT7310_T_ALARM_LOW 7
+
+static const u8 adt7310_reg_table[] = {
+ [ADT7X10_TEMPERATURE] = ADT7310_TEMPERATURE,
+ [ADT7X10_STATUS] = ADT7310_STATUS,
+ [ADT7X10_CONFIG] = ADT7310_CONFIG,
+ [ADT7X10_T_ALARM_HIGH] = ADT7310_T_ALARM_HIGH,
+ [ADT7X10_T_ALARM_LOW] = ADT7310_T_ALARM_LOW,
+ [ADT7X10_T_CRIT] = ADT7310_T_CRIT,
+ [ADT7X10_T_HYST] = ADT7310_T_HYST,
+ [ADT7X10_ID] = ADT7310_ID,
+};
+
+#define ADT7310_CMD_REG_OFFSET 3
+#define ADT7310_CMD_READ 0x40
+
+#define AD7310_COMMAND(reg) (adt7310_reg_table[(reg)] << ADT7310_CMD_REG_OFFSET)
+
+static int adt7310_spi_read_word(struct device *dev, u8 reg)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ int ret;
+
+ ret = spi_w8r16(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
+ if (ret < 0)
+ return ret;
+
+ return be16_to_cpu(ret);
+}
+
+static int adt7310_spi_write_word(struct device *dev, u8 reg, u16 data)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ u8 buf[3];
+
+ buf[0] = AD7310_COMMAND(reg);
+ put_unaligned_be16(data, &buf[1]);
+
+ return spi_write(spi, buf, sizeof(buf));
+}
+
+static int adt7310_spi_read_byte(struct device *dev, u8 reg)
+{
+ struct spi_device *spi = to_spi_device(dev);
+
+ return spi_w8r8(spi, AD7310_COMMAND(reg) | ADT7310_CMD_READ);
+}
+
+static int adt7310_spi_write_byte(struct device *dev, u8 reg,
+ u8 data)
+{
+ struct spi_device *spi = to_spi_device(dev);
+ u8 buf[2];
+
+ buf[0] = AD7310_COMMAND(reg);
+ buf[1] = data;
+
+ return spi_write(spi, buf, sizeof(buf));
+}
+
+static const struct adt7x10_ops adt7310_spi_ops = {
+ .read_word = adt7310_spi_read_word,
+ .write_word = adt7310_spi_write_word,
+ .read_byte = adt7310_spi_read_byte,
+ .write_byte = adt7310_spi_write_byte,
+};
+
+static int adt7310_spi_probe(struct spi_device *spi)
+{
+ return adt7x10_probe(&spi->dev, spi_get_device_id(spi)->name,
+ &adt7310_spi_ops);
+}
+
+static int adt7310_spi_remove(struct spi_device *spi)
+{
+ return adt7x10_remove(&spi->dev);
+}
+
+static const struct spi_device_id adt7310_id[] = {
+ { "adt7310", 0 },
+ { "adt7320", 0 },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, adt7310_id);
+
+static struct spi_driver adt7310_driver = {
+ .driver = {
+ .name = "adt7310",
+ .owner = THIS_MODULE,
+ .pm = ADT7X10_DEV_PM_OPS,
+ },
+ .probe = adt7310_spi_probe,
+ .remove = adt7310_spi_remove,
+ .id_table = adt7310_id,
+};
+module_spi_driver(adt7310_driver);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("ADT7310/ADT7320 driver");
+MODULE_LICENSE("GPL");
/*
- * adt7410.c - Part of lm_sensors, Linux kernel modules for hardware
- * monitoring
- * This driver handles the ADT7410 and compatible digital temperature sensors.
- * Hartmut Knaack <knaack.h@gmx.de> 2012-07-22
- * based on lm75.c by Frodo Looijaard <frodol@dds.nl>
- * and adt7410.c from iio-staging by Sonic Zhang <sonic.zhang@analog.com>
+ * ADT7410/ADT7420 digital temperature sensor driver
*
- * 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.
+ * Copyright 2012-2013 Analog Devices Inc.
+ * Author: Lars-Peter Clausen <lars@metafoo.de>
*
- * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Licensed under the GPL-2 or later.
*/
#include <linux/module.h>
#include <linux/init.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
#include <linux/i2c.h>
-#include <linux/hwmon.h>
-#include <linux/hwmon-sysfs.h>
-#include <linux/err.h>
-#include <linux/mutex.h>
-#include <linux/delay.h>
-
-/*
- * ADT7410 registers definition
- */
-
-#define ADT7410_TEMPERATURE 0
-#define ADT7410_STATUS 2
-#define ADT7410_CONFIG 3
-#define ADT7410_T_ALARM_HIGH 4
-#define ADT7410_T_ALARM_LOW 6
-#define ADT7410_T_CRIT 8
-#define ADT7410_T_HYST 0xA
-
-/*
- * ADT7410 status
- */
-#define ADT7410_STAT_T_LOW (1 << 4)
-#define ADT7410_STAT_T_HIGH (1 << 5)
-#define ADT7410_STAT_T_CRIT (1 << 6)
-#define ADT7410_STAT_NOT_RDY (1 << 7)
-
-/*
- * ADT7410 config
- */
-#define ADT7410_FAULT_QUEUE_MASK (1 << 0 | 1 << 1)
-#define ADT7410_CT_POLARITY (1 << 2)
-#define ADT7410_INT_POLARITY (1 << 3)
-#define ADT7410_EVENT_MODE (1 << 4)
-#define ADT7410_MODE_MASK (1 << 5 | 1 << 6)
-#define ADT7410_FULL (0 << 5 | 0 << 6)
-#define ADT7410_PD (1 << 5 | 1 << 6)
-#define ADT7410_RESOLUTION (1 << 7)
-
-/*
- * ADT7410 masks
- */
-#define ADT7410_T13_VALUE_MASK 0xFFF8
-#define ADT7410_T_HYST_MASK 0xF
-
-/* straight from the datasheet */
-#define ADT7410_TEMP_MIN (-55000)
-#define ADT7410_TEMP_MAX 150000
-
-enum adt7410_type { /* keep sorted in alphabetical order */
- adt7410,
-};
-
-static const u8 ADT7410_REG_TEMP[4] = {
- ADT7410_TEMPERATURE, /* input */
- ADT7410_T_ALARM_HIGH, /* high */
- ADT7410_T_ALARM_LOW, /* low */
- ADT7410_T_CRIT, /* critical */
-};
-
-/* Each client has this additional data */
-struct adt7410_data {
- struct device *hwmon_dev;
- struct mutex update_lock;
- u8 config;
- u8 oldconfig;
- bool valid; /* true if registers valid */
- unsigned long last_updated; /* In jiffies */
- s16 temp[4]; /* Register values,
- 0 = input
- 1 = high
- 2 = low
- 3 = critical */
- u8 hyst; /* hysteresis offset */
-};
-
-/*
- * adt7410 register access by I2C
- */
-static int adt7410_temp_ready(struct i2c_client *client)
-{
- int i, status;
-
- for (i = 0; i < 6; i++) {
- status = i2c_smbus_read_byte_data(client, ADT7410_STATUS);
- if (status < 0)
- return status;
- if (!(status & ADT7410_STAT_NOT_RDY))
- return 0;
- msleep(60);
- }
- return -ETIMEDOUT;
-}
-
-static int adt7410_update_temp(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct adt7410_data *data = i2c_get_clientdata(client);
- int ret = 0;
-
- mutex_lock(&data->update_lock);
-
- if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
- || !data->valid) {
- int temp;
-
- dev_dbg(&client->dev, "Starting update\n");
-
- ret = adt7410_temp_ready(client); /* check for new value */
- if (ret)
- goto abort;
-
- temp = i2c_smbus_read_word_swapped(client, ADT7410_REG_TEMP[0]);
- if (temp < 0) {
- ret = temp;
- dev_dbg(dev, "Failed to read value: reg %d, error %d\n",
- ADT7410_REG_TEMP[0], ret);
- goto abort;
- }
- data->temp[0] = temp;
-
- data->last_updated = jiffies;
- data->valid = true;
- }
-
-abort:
- mutex_unlock(&data->update_lock);
- return ret;
-}
-
-static int adt7410_fill_cache(struct i2c_client *client)
-{
- struct adt7410_data *data = i2c_get_clientdata(client);
- int ret;
- int i;
-
- for (i = 1; i < ARRAY_SIZE(ADT7410_REG_TEMP); i++) {
- ret = i2c_smbus_read_word_swapped(client, ADT7410_REG_TEMP[i]);
- if (ret < 0) {
- dev_dbg(&client->dev,
- "Failed to read value: reg %d, error %d\n",
- ADT7410_REG_TEMP[i], ret);
- return ret;
- }
- data->temp[i] = ret;
- }
-
- ret = i2c_smbus_read_byte_data(client, ADT7410_T_HYST);
- if (ret < 0) {
- dev_dbg(&client->dev,
- "Failed to read value: hyst reg, error %d\n",
- ret);
- return ret;
- }
- data->hyst = ret;
-
- return 0;
-}
-
-static s16 ADT7410_TEMP_TO_REG(long temp)
-{
- return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7410_TEMP_MIN,
- ADT7410_TEMP_MAX) * 128, 1000);
-}
-
-static int ADT7410_REG_TO_TEMP(struct adt7410_data *data, s16 reg)
-{
- /* in 13 bit mode, bits 0-2 are status flags - mask them out */
- if (!(data->config & ADT7410_RESOLUTION))
- reg &= ADT7410_T13_VALUE_MASK;
- /*
- * temperature is stored in twos complement format, in steps of
- * 1/128°C
- */
- return DIV_ROUND_CLOSEST(reg * 1000, 128);
-}
-
-/*-----------------------------------------------------------------------*/
-/* sysfs attributes for hwmon */
+#include "adt7x10.h"
-static ssize_t adt7410_show_temp(struct device *dev,
- struct device_attribute *da, char *buf)
+static int adt7410_i2c_read_word(struct device *dev, u8 reg)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct i2c_client *client = to_i2c_client(dev);
- struct adt7410_data *data = i2c_get_clientdata(client);
-
- if (attr->index == 0) {
- int ret;
-
- ret = adt7410_update_temp(dev);
- if (ret)
- return ret;
- }
-
- return sprintf(buf, "%d\n", ADT7410_REG_TO_TEMP(data,
- data->temp[attr->index]));
+ return i2c_smbus_read_word_swapped(to_i2c_client(dev), reg);
}
-static ssize_t adt7410_set_temp(struct device *dev,
- struct device_attribute *da,
- const char *buf, size_t count)
+static int adt7410_i2c_write_word(struct device *dev, u8 reg, u16 data)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct i2c_client *client = to_i2c_client(dev);
- struct adt7410_data *data = i2c_get_clientdata(client);
- int nr = attr->index;
- long temp;
- int ret;
-
- ret = kstrtol(buf, 10, &temp);
- if (ret)
- return ret;
-
- mutex_lock(&data->update_lock);
- data->temp[nr] = ADT7410_TEMP_TO_REG(temp);
- ret = i2c_smbus_write_word_swapped(client, ADT7410_REG_TEMP[nr],
- data->temp[nr]);
- if (ret)
- count = ret;
- mutex_unlock(&data->update_lock);
- return count;
+ return i2c_smbus_write_word_swapped(to_i2c_client(dev), reg, data);
}
-static ssize_t adt7410_show_t_hyst(struct device *dev,
- struct device_attribute *da,
- char *buf)
+static int adt7410_i2c_read_byte(struct device *dev, u8 reg)
{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct i2c_client *client = to_i2c_client(dev);
- struct adt7410_data *data = i2c_get_clientdata(client);
- int nr = attr->index;
- int hyst;
-
- hyst = (data->hyst & ADT7410_T_HYST_MASK) * 1000;
-
- /*
- * hysteresis is stored as a 4 bit offset in the device, convert it
- * to an absolute value
- */
- if (nr == 2) /* min has positive offset, others have negative */
- hyst = -hyst;
- return sprintf(buf, "%d\n",
- ADT7410_REG_TO_TEMP(data, data->temp[nr]) - hyst);
+ return i2c_smbus_read_byte_data(to_i2c_client(dev), reg);
}
-static ssize_t adt7410_set_t_hyst(struct device *dev,
- struct device_attribute *da,
- const char *buf, size_t count)
+static int adt7410_i2c_write_byte(struct device *dev, u8 reg, u8 data)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct adt7410_data *data = i2c_get_clientdata(client);
- int limit, ret;
- long hyst;
-
- ret = kstrtol(buf, 10, &hyst);
- if (ret)
- return ret;
- /* convert absolute hysteresis value to a 4 bit delta value */
- limit = ADT7410_REG_TO_TEMP(data, data->temp[1]);
- hyst = clamp_val(hyst, ADT7410_TEMP_MIN, ADT7410_TEMP_MAX);
- data->hyst = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000), 0,
- ADT7410_T_HYST_MASK);
- ret = i2c_smbus_write_byte_data(client, ADT7410_T_HYST, data->hyst);
- if (ret)
- return ret;
-
- return count;
+ return i2c_smbus_write_byte_data(to_i2c_client(dev), reg, data);
}
-static ssize_t adt7410_show_alarm(struct device *dev,
- struct device_attribute *da,
- char *buf)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- int ret;
-
- ret = i2c_smbus_read_byte_data(client, ADT7410_STATUS);
- if (ret < 0)
- return ret;
-
- return sprintf(buf, "%d\n", !!(ret & attr->index));
-}
-
-static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, adt7410_show_temp, NULL, 0);
-static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
- adt7410_show_temp, adt7410_set_temp, 1);
-static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO,
- adt7410_show_temp, adt7410_set_temp, 2);
-static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO,
- adt7410_show_temp, adt7410_set_temp, 3);
-static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
- adt7410_show_t_hyst, adt7410_set_t_hyst, 1);
-static SENSOR_DEVICE_ATTR(temp1_min_hyst, S_IRUGO,
- adt7410_show_t_hyst, NULL, 2);
-static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO,
- adt7410_show_t_hyst, NULL, 3);
-static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, adt7410_show_alarm,
- NULL, ADT7410_STAT_T_LOW);
-static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, adt7410_show_alarm,
- NULL, ADT7410_STAT_T_HIGH);
-static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, adt7410_show_alarm,
- NULL, ADT7410_STAT_T_CRIT);
-
-static struct attribute *adt7410_attributes[] = {
- &sensor_dev_attr_temp1_input.dev_attr.attr,
- &sensor_dev_attr_temp1_max.dev_attr.attr,
- &sensor_dev_attr_temp1_min.dev_attr.attr,
- &sensor_dev_attr_temp1_crit.dev_attr.attr,
- &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
- &sensor_dev_attr_temp1_min_hyst.dev_attr.attr,
- &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
- &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
- &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
- NULL
+static const struct adt7x10_ops adt7410_i2c_ops = {
+ .read_word = adt7410_i2c_read_word,
+ .write_word = adt7410_i2c_write_word,
+ .read_byte = adt7410_i2c_read_byte,
+ .write_byte = adt7410_i2c_write_byte,
};
-static const struct attribute_group adt7410_group = {
- .attrs = adt7410_attributes,
-};
-
-/*-----------------------------------------------------------------------*/
-
-/* device probe and removal */
-
-static int adt7410_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int adt7410_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
- struct adt7410_data *data;
- int ret;
-
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA))
return -ENODEV;
- data = devm_kzalloc(&client->dev, sizeof(struct adt7410_data),
- GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- i2c_set_clientdata(client, data);
- mutex_init(&data->update_lock);
-
- /* configure as specified */
- ret = i2c_smbus_read_byte_data(client, ADT7410_CONFIG);
- if (ret < 0) {
- dev_dbg(&client->dev, "Can't read config? %d\n", ret);
- return ret;
- }
- data->oldconfig = ret;
- /*
- * Set to 16 bit resolution, continous conversion and comparator mode.
- */
- ret &= ~ADT7410_MODE_MASK;
- data->config = ret | ADT7410_FULL | ADT7410_RESOLUTION |
- ADT7410_EVENT_MODE;
- if (data->config != data->oldconfig) {
- ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG,
- data->config);
- if (ret)
- return ret;
- }
- dev_dbg(&client->dev, "Config %02x\n", data->config);
-
- ret = adt7410_fill_cache(client);
- if (ret)
- goto exit_restore;
-
- /* Register sysfs hooks */
- ret = sysfs_create_group(&client->dev.kobj, &adt7410_group);
- if (ret)
- goto exit_restore;
-
- data->hwmon_dev = hwmon_device_register(&client->dev);
- if (IS_ERR(data->hwmon_dev)) {
- ret = PTR_ERR(data->hwmon_dev);
- goto exit_remove;
- }
-
- dev_info(&client->dev, "sensor '%s'\n", client->name);
-
- return 0;
-
-exit_remove:
- sysfs_remove_group(&client->dev.kobj, &adt7410_group);
-exit_restore:
- i2c_smbus_write_byte_data(client, ADT7410_CONFIG, data->oldconfig);
- return ret;
+ return adt7x10_probe(&client->dev, NULL, &adt7410_i2c_ops);
}
-static int adt7410_remove(struct i2c_client *client)
+static int adt7410_i2c_remove(struct i2c_client *client)
{
- struct adt7410_data *data = i2c_get_clientdata(client);
-
- hwmon_device_unregister(data->hwmon_dev);
- sysfs_remove_group(&client->dev.kobj, &adt7410_group);
- if (data->oldconfig != data->config)
- i2c_smbus_write_byte_data(client, ADT7410_CONFIG,
- data->oldconfig);
- return 0;
+ return adt7x10_remove(&client->dev);
}
static const struct i2c_device_id adt7410_ids[] = {
- { "adt7410", adt7410, },
- { "adt7420", adt7410, },
- { /* LIST END */ }
+ { "adt7410", 0 },
+ { "adt7420", 0 },
+ {}
};
MODULE_DEVICE_TABLE(i2c, adt7410_ids);
-#ifdef CONFIG_PM_SLEEP
-static int adt7410_suspend(struct device *dev)
-{
- int ret;
- struct i2c_client *client = to_i2c_client(dev);
- struct adt7410_data *data = i2c_get_clientdata(client);
-
- ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG,
- data->config | ADT7410_PD);
- return ret;
-}
-
-static int adt7410_resume(struct device *dev)
-{
- int ret;
- struct i2c_client *client = to_i2c_client(dev);
- struct adt7410_data *data = i2c_get_clientdata(client);
-
- ret = i2c_smbus_write_byte_data(client, ADT7410_CONFIG, data->config);
- return ret;
-}
-
-static SIMPLE_DEV_PM_OPS(adt7410_dev_pm_ops, adt7410_suspend, adt7410_resume);
-
-#define ADT7410_DEV_PM_OPS (&adt7410_dev_pm_ops)
-#else
-#define ADT7410_DEV_PM_OPS NULL
-#endif /* CONFIG_PM */
-
static struct i2c_driver adt7410_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adt7410",
- .pm = ADT7410_DEV_PM_OPS,
+ .pm = ADT7X10_DEV_PM_OPS,
},
- .probe = adt7410_probe,
- .remove = adt7410_remove,
+ .probe = adt7410_i2c_probe,
+ .remove = adt7410_i2c_remove,
.id_table = adt7410_ids,
.address_list = I2C_ADDRS(0x48, 0x49, 0x4a, 0x4b),
};
-
module_i2c_driver(adt7410_driver);
-MODULE_AUTHOR("Hartmut Knaack");
-MODULE_DESCRIPTION("ADT7410/ADT7420 driver");
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("ADT7410/AD7420 driver");
MODULE_LICENSE("GPL");
--- /dev/null
+/*
+ * adt7x10.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ * This driver handles the ADT7410 and compatible digital temperature sensors.
+ * Hartmut Knaack <knaack.h@gmx.de> 2012-07-22
+ * based on lm75.c by Frodo Looijaard <frodol@dds.nl>
+ * and adt7410.c from iio-staging by Sonic Zhang <sonic.zhang@analog.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.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/err.h>
+#include <linux/mutex.h>
+#include <linux/delay.h>
+
+#include "adt7x10.h"
+
+/*
+ * ADT7X10 status
+ */
+#define ADT7X10_STAT_T_LOW (1 << 4)
+#define ADT7X10_STAT_T_HIGH (1 << 5)
+#define ADT7X10_STAT_T_CRIT (1 << 6)
+#define ADT7X10_STAT_NOT_RDY (1 << 7)
+
+/*
+ * ADT7X10 config
+ */
+#define ADT7X10_FAULT_QUEUE_MASK (1 << 0 | 1 << 1)
+#define ADT7X10_CT_POLARITY (1 << 2)
+#define ADT7X10_INT_POLARITY (1 << 3)
+#define ADT7X10_EVENT_MODE (1 << 4)
+#define ADT7X10_MODE_MASK (1 << 5 | 1 << 6)
+#define ADT7X10_FULL (0 << 5 | 0 << 6)
+#define ADT7X10_PD (1 << 5 | 1 << 6)
+#define ADT7X10_RESOLUTION (1 << 7)
+
+/*
+ * ADT7X10 masks
+ */
+#define ADT7X10_T13_VALUE_MASK 0xFFF8
+#define ADT7X10_T_HYST_MASK 0xF
+
+/* straight from the datasheet */
+#define ADT7X10_TEMP_MIN (-55000)
+#define ADT7X10_TEMP_MAX 150000
+
+/* Each client has this additional data */
+struct adt7x10_data {
+ const struct adt7x10_ops *ops;
+ const char *name;
+ struct device *hwmon_dev;
+ struct mutex update_lock;
+ u8 config;
+ u8 oldconfig;
+ bool valid; /* true if registers valid */
+ unsigned long last_updated; /* In jiffies */
+ s16 temp[4]; /* Register values,
+ 0 = input
+ 1 = high
+ 2 = low
+ 3 = critical */
+ u8 hyst; /* hysteresis offset */
+};
+
+static int adt7x10_read_byte(struct device *dev, u8 reg)
+{
+ struct adt7x10_data *d = dev_get_drvdata(dev);
+ return d->ops->read_byte(dev, reg);
+}
+
+static int adt7x10_write_byte(struct device *dev, u8 reg, u8 data)
+{
+ struct adt7x10_data *d = dev_get_drvdata(dev);
+ return d->ops->write_byte(dev, reg, data);
+}
+
+static int adt7x10_read_word(struct device *dev, u8 reg)
+{
+ struct adt7x10_data *d = dev_get_drvdata(dev);
+ return d->ops->read_word(dev, reg);
+}
+
+static int adt7x10_write_word(struct device *dev, u8 reg, u16 data)
+{
+ struct adt7x10_data *d = dev_get_drvdata(dev);
+ return d->ops->write_word(dev, reg, data);
+}
+
+static const u8 ADT7X10_REG_TEMP[4] = {
+ ADT7X10_TEMPERATURE, /* input */
+ ADT7X10_T_ALARM_HIGH, /* high */
+ ADT7X10_T_ALARM_LOW, /* low */
+ ADT7X10_T_CRIT, /* critical */
+};
+
+static int adt7x10_temp_ready(struct device *dev)
+{
+ int i, status;
+
+ for (i = 0; i < 6; i++) {
+ status = adt7x10_read_byte(dev, ADT7X10_STATUS);
+ if (status < 0)
+ return status;
+ if (!(status & ADT7X10_STAT_NOT_RDY))
+ return 0;
+ msleep(60);
+ }
+ return -ETIMEDOUT;
+}
+
+static int adt7x10_update_temp(struct device *dev)
+{
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+ int ret = 0;
+
+ mutex_lock(&data->update_lock);
+
+ if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
+ || !data->valid) {
+ int temp;
+
+ dev_dbg(dev, "Starting update\n");
+
+ ret = adt7x10_temp_ready(dev); /* check for new value */
+ if (ret)
+ goto abort;
+
+ temp = adt7x10_read_word(dev, ADT7X10_REG_TEMP[0]);
+ if (temp < 0) {
+ ret = temp;
+ dev_dbg(dev, "Failed to read value: reg %d, error %d\n",
+ ADT7X10_REG_TEMP[0], ret);
+ goto abort;
+ }
+ data->temp[0] = temp;
+ data->last_updated = jiffies;
+ data->valid = true;
+ }
+
+abort:
+ mutex_unlock(&data->update_lock);
+ return ret;
+}
+
+static int adt7x10_fill_cache(struct device *dev)
+{
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+ int ret;
+ int i;
+
+ for (i = 1; i < ARRAY_SIZE(data->temp); i++) {
+ ret = adt7x10_read_word(dev, ADT7X10_REG_TEMP[i]);
+ if (ret < 0) {
+ dev_dbg(dev, "Failed to read value: reg %d, error %d\n",
+ ADT7X10_REG_TEMP[i], ret);
+ return ret;
+ }
+ data->temp[i] = ret;
+ }
+
+ ret = adt7x10_read_byte(dev, ADT7X10_T_HYST);
+ if (ret < 0) {
+ dev_dbg(dev, "Failed to read value: reg %d, error %d\n",
+ ADT7X10_T_HYST, ret);
+ return ret;
+ }
+ data->hyst = ret;
+
+ return 0;
+}
+
+static s16 ADT7X10_TEMP_TO_REG(long temp)
+{
+ return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7X10_TEMP_MIN,
+ ADT7X10_TEMP_MAX) * 128, 1000);
+}
+
+static int ADT7X10_REG_TO_TEMP(struct adt7x10_data *data, s16 reg)
+{
+ /* in 13 bit mode, bits 0-2 are status flags - mask them out */
+ if (!(data->config & ADT7X10_RESOLUTION))
+ reg &= ADT7X10_T13_VALUE_MASK;
+ /*
+ * temperature is stored in twos complement format, in steps of
+ * 1/128°C
+ */
+ return DIV_ROUND_CLOSEST(reg * 1000, 128);
+}
+
+/*-----------------------------------------------------------------------*/
+
+/* sysfs attributes for hwmon */
+
+static ssize_t adt7x10_show_temp(struct device *dev,
+ struct device_attribute *da,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+
+
+ if (attr->index == 0) {
+ int ret;
+
+ ret = adt7x10_update_temp(dev);
+ if (ret)
+ return ret;
+ }
+
+ return sprintf(buf, "%d\n", ADT7X10_REG_TO_TEMP(data,
+ data->temp[attr->index]));
+}
+
+static ssize_t adt7x10_set_temp(struct device *dev,
+ struct device_attribute *da,
+ const char *buf, size_t count)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+ int nr = attr->index;
+ long temp;
+ int ret;
+
+ ret = kstrtol(buf, 10, &temp);
+ if (ret)
+ return ret;
+
+ mutex_lock(&data->update_lock);
+ data->temp[nr] = ADT7X10_TEMP_TO_REG(temp);
+ ret = adt7x10_write_word(dev, ADT7X10_REG_TEMP[nr], data->temp[nr]);
+ if (ret)
+ count = ret;
+ mutex_unlock(&data->update_lock);
+ return count;
+}
+
+static ssize_t adt7x10_show_t_hyst(struct device *dev,
+ struct device_attribute *da,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+ int nr = attr->index;
+ int hyst;
+
+ hyst = (data->hyst & ADT7X10_T_HYST_MASK) * 1000;
+
+ /*
+ * hysteresis is stored as a 4 bit offset in the device, convert it
+ * to an absolute value
+ */
+ if (nr == 2) /* min has positive offset, others have negative */
+ hyst = -hyst;
+ return sprintf(buf, "%d\n",
+ ADT7X10_REG_TO_TEMP(data, data->temp[nr]) - hyst);
+}
+
+static ssize_t adt7x10_set_t_hyst(struct device *dev,
+ struct device_attribute *da,
+ const char *buf, size_t count)
+{
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+ int limit, ret;
+ long hyst;
+
+ ret = kstrtol(buf, 10, &hyst);
+ if (ret)
+ return ret;
+ /* convert absolute hysteresis value to a 4 bit delta value */
+ limit = ADT7X10_REG_TO_TEMP(data, data->temp[1]);
+ hyst = clamp_val(hyst, ADT7X10_TEMP_MIN, ADT7X10_TEMP_MAX);
+ data->hyst = clamp_val(DIV_ROUND_CLOSEST(limit - hyst, 1000),
+ 0, ADT7X10_T_HYST_MASK);
+ ret = adt7x10_write_byte(dev, ADT7X10_T_HYST, data->hyst);
+ if (ret)
+ return ret;
+
+ return count;
+}
+
+static ssize_t adt7x10_show_alarm(struct device *dev,
+ struct device_attribute *da,
+ char *buf)
+{
+ struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
+ int ret;
+
+ ret = adt7x10_read_byte(dev, ADT7X10_STATUS);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", !!(ret & attr->index));
+}
+
+static ssize_t adt7x10_show_name(struct device *dev,
+ struct device_attribute *da,
+ char *buf)
+{
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%s\n", data->name);
+}
+
+static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, adt7x10_show_temp, NULL, 0);
+static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
+ adt7x10_show_temp, adt7x10_set_temp, 1);
+static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO,
+ adt7x10_show_temp, adt7x10_set_temp, 2);
+static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO,
+ adt7x10_show_temp, adt7x10_set_temp, 3);
+static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
+ adt7x10_show_t_hyst, adt7x10_set_t_hyst, 1);
+static SENSOR_DEVICE_ATTR(temp1_min_hyst, S_IRUGO,
+ adt7x10_show_t_hyst, NULL, 2);
+static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IRUGO,
+ adt7x10_show_t_hyst, NULL, 3);
+static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, adt7x10_show_alarm,
+ NULL, ADT7X10_STAT_T_LOW);
+static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, adt7x10_show_alarm,
+ NULL, ADT7X10_STAT_T_HIGH);
+static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, adt7x10_show_alarm,
+ NULL, ADT7X10_STAT_T_CRIT);
+static DEVICE_ATTR(name, S_IRUGO, adt7x10_show_name, NULL);
+
+static struct attribute *adt7x10_attributes[] = {
+ &sensor_dev_attr_temp1_input.dev_attr.attr,
+ &sensor_dev_attr_temp1_max.dev_attr.attr,
+ &sensor_dev_attr_temp1_min.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
+ &sensor_dev_attr_temp1_min_hyst.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
+ &sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
+ &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
+ NULL
+};
+
+static const struct attribute_group adt7x10_group = {
+ .attrs = adt7x10_attributes,
+};
+
+int adt7x10_probe(struct device *dev, const char *name,
+ const struct adt7x10_ops *ops)
+{
+ struct adt7x10_data *data;
+ int ret;
+
+ data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
+
+ data->ops = ops;
+ data->name = name;
+
+ dev_set_drvdata(dev, data);
+ mutex_init(&data->update_lock);
+
+ /* configure as specified */
+ ret = adt7x10_read_byte(dev, ADT7X10_CONFIG);
+ if (ret < 0) {
+ dev_dbg(dev, "Can't read config? %d\n", ret);
+ return ret;
+ }
+ data->oldconfig = ret;
+
+ /*
+ * Set to 16 bit resolution, continous conversion and comparator mode.
+ */
+ data->config = data->oldconfig;
+ data->config &= ~ADT7X10_MODE_MASK;
+ data->config |= ADT7X10_FULL | ADT7X10_RESOLUTION | ADT7X10_EVENT_MODE;
+ if (data->config != data->oldconfig) {
+ ret = adt7x10_write_byte(dev, ADT7X10_CONFIG, data->config);
+ if (ret)
+ return ret;
+ }
+ dev_dbg(dev, "Config %02x\n", data->config);
+
+ ret = adt7x10_fill_cache(dev);
+ if (ret)
+ goto exit_restore;
+
+ /* Register sysfs hooks */
+ ret = sysfs_create_group(&dev->kobj, &adt7x10_group);
+ if (ret)
+ goto exit_restore;
+
+ /*
+ * The I2C device will already have it's own 'name' attribute, but for
+ * the SPI device we need to register it. name will only be non NULL if
+ * the device doesn't register the 'name' attribute on its own.
+ */
+ if (name) {
+ ret = device_create_file(dev, &dev_attr_name);
+ if (ret)
+ goto exit_remove;
+ }
+
+ data->hwmon_dev = hwmon_device_register(dev);
+ if (IS_ERR(data->hwmon_dev)) {
+ ret = PTR_ERR(data->hwmon_dev);
+ goto exit_remove_name;
+ }
+
+ return 0;
+
+exit_remove_name:
+ if (name)
+ device_remove_file(dev, &dev_attr_name);
+exit_remove:
+ sysfs_remove_group(&dev->kobj, &adt7x10_group);
+exit_restore:
+ adt7x10_write_byte(dev, ADT7X10_CONFIG, data->oldconfig);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(adt7x10_probe);
+
+int adt7x10_remove(struct device *dev)
+{
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+
+ hwmon_device_unregister(data->hwmon_dev);
+ if (data->name)
+ device_remove_file(dev, &dev_attr_name);
+ sysfs_remove_group(&dev->kobj, &adt7x10_group);
+ if (data->oldconfig != data->config)
+ adt7x10_write_byte(dev, ADT7X10_CONFIG, data->oldconfig);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(adt7x10_remove);
+
+#ifdef CONFIG_PM_SLEEP
+
+static int adt7x10_suspend(struct device *dev)
+{
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+
+ return adt7x10_write_byte(dev, ADT7X10_CONFIG,
+ data->config | ADT7X10_PD);
+}
+
+static int adt7x10_resume(struct device *dev)
+{
+ struct adt7x10_data *data = dev_get_drvdata(dev);
+
+ return adt7x10_write_byte(dev, ADT7X10_CONFIG, data->config);
+}
+
+SIMPLE_DEV_PM_OPS(adt7x10_dev_pm_ops, adt7x10_suspend, adt7x10_resume);
+EXPORT_SYMBOL_GPL(adt7x10_dev_pm_ops);
+
+#endif /* CONFIG_PM_SLEEP */
+
+MODULE_AUTHOR("Hartmut Knaack");
+MODULE_DESCRIPTION("ADT7410/ADT7420, ADT7310/ADT7320 common code");
+MODULE_LICENSE("GPL");
--- /dev/null
+#ifndef __HWMON_ADT7X10_H__
+#define __HWMON_ADT7X10_H__
+
+#include <linux/types.h>
+#include <linux/pm.h>
+
+/* ADT7410 registers definition */
+#define ADT7X10_TEMPERATURE 0
+#define ADT7X10_STATUS 2
+#define ADT7X10_CONFIG 3
+#define ADT7X10_T_ALARM_HIGH 4
+#define ADT7X10_T_ALARM_LOW 6
+#define ADT7X10_T_CRIT 8
+#define ADT7X10_T_HYST 0xA
+#define ADT7X10_ID 0xB
+
+struct device;
+
+struct adt7x10_ops {
+ int (*read_byte)(struct device *, u8 reg);
+ int (*write_byte)(struct device *, u8 reg, u8 data);
+ int (*read_word)(struct device *, u8 reg);
+ int (*write_word)(struct device *, u8 reg, u16 data);
+};
+
+int adt7x10_probe(struct device *dev, const char *name,
+ const struct adt7x10_ops *ops);
+int adt7x10_remove(struct device *dev);
+
+#ifdef CONFIG_PM_SLEEP
+extern const struct dev_pm_ops adt7x10_dev_pm_ops;
+#define ADT7X10_DEV_PM_OPS (&adt7x10_dev_pm_ops)
+#else
+#define ADT7X10_DEV_PM_OPS NULL
+#endif
+
+#endif
projects / ceph-client.git / commitdiff