/*
- * 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 struct adt7410_data *adt7410_update_device(struct device *dev)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct adt7410_data *data = i2c_get_clientdata(client);
- struct adt7410_data *ret = data;
- mutex_lock(&data->update_lock);
-
- if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
- || !data->valid) {
- int i, status;
- dev_dbg(&client->dev, "Starting update\n");
+#include "adt7x10.h"
- status = adt7410_temp_ready(client); /* check for new value */
- if (unlikely(status)) {
- ret = ERR_PTR(status);
- goto abort;
- }
- for (i = 0; i < ARRAY_SIZE(data->temp); i++) {
- status = i2c_smbus_read_word_swapped(client,
- ADT7410_REG_TEMP[i]);
- if (unlikely(status < 0)) {
- dev_dbg(dev,
- "Failed to read value: reg %d, error %d\n",
- ADT7410_REG_TEMP[i], status);
- ret = ERR_PTR(status);
- goto abort;
- }
- data->temp[i] = status;
- }
- status = i2c_smbus_read_byte_data(client, ADT7410_T_HYST);
- if (unlikely(status < 0)) {
- dev_dbg(dev,
- "Failed to read value: reg %d, error %d\n",
- ADT7410_T_HYST, status);
- ret = ERR_PTR(status);
- goto abort;
- }
- data->hyst = status;
- data->last_updated = jiffies;
- data->valid = true;
- }
-
-abort:
- mutex_unlock(&data->update_lock);
- return ret;
-}
-
-static s16 ADT7410_TEMP_TO_REG(long temp)
+static int adt7410_i2c_read_word(struct device *dev, u8 reg)
{
- return DIV_ROUND_CLOSEST(clamp_val(temp, ADT7410_TEMP_MIN,
- ADT7410_TEMP_MAX) * 128, 1000);
+ return i2c_smbus_read_word_swapped(to_i2c_client(dev), reg);
}
-static int ADT7410_REG_TO_TEMP(struct adt7410_data *data, s16 reg)
+static int adt7410_i2c_write_word(struct device *dev, u8 reg, u16 data)
{
- /* 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);
+ return i2c_smbus_write_word_swapped(to_i2c_client(dev), reg, data);
}
-/*-----------------------------------------------------------------------*/
-
-/* sysfs attributes for hwmon */
-
-static ssize_t adt7410_show_temp(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 adt7410_data *data = adt7410_update_device(dev);
-
- if (IS_ERR(data))
- return PTR_ERR(data);
-
- return sprintf(buf, "%d\n", ADT7410_REG_TO_TEMP(data,
- data->temp[attr->index]));
+ return i2c_smbus_read_byte_data(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_byte(struct device *dev, u8 reg, u8 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_byte_data(to_i2c_client(dev), reg, data);
}
-static ssize_t adt7410_show_t_hyst(struct device *dev,
- struct device_attribute *da,
- char *buf)
-{
- struct sensor_device_attribute *attr = to_sensor_dev_attr(da);
- struct adt7410_data *data;
- int nr = attr->index;
- int hyst;
-
- data = adt7410_update_device(dev);
- if (IS_ERR(data))
- return PTR_ERR(data);
- 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);
-}
-
-static ssize_t adt7410_set_t_hyst(struct device *dev,
- struct device_attribute *da,
- const char *buf, size_t count)
-{
- 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;
-}
-
-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);
-
- /* 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, client->irq, &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, client->irq);
}
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");
projects / firefly-linux-kernel-4.4.55.git / blobdiff