linux/drivers/hwmon/thmc50.c
Jean Delvare dcd8f39230 hwmon: Add missing inclusions of <linux/jiffies.h>
Many hwmon drivers use jiffies but omit the inclusion of the header
file. Fix that, and also fix one driver which was including the header
file but didn't need it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Luca Tettamanti <kronos.it@gmail.com>
Cc: Marc Hulsman <m.hulsman@tudelft.nl>
Cc: Rudolf Marek <r.marek@assembler.cz>
2012-10-10 15:25:56 +02:00

483 lines
14 KiB
C

/*
* thmc50.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
* Copyright (C) 2007 Krzysztof Helt <krzysztof.h1@wp.pl>
* Based on 2.4 driver by Frodo Looijaard <frodol@dds.nl> and
* Philip Edelbrock <phil@netroedge.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/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/jiffies.h>
MODULE_LICENSE("GPL");
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
/* Insmod parameters */
enum chips { thmc50, adm1022 };
static unsigned short adm1022_temp3[16];
static unsigned int adm1022_temp3_num;
module_param_array(adm1022_temp3, ushort, &adm1022_temp3_num, 0);
MODULE_PARM_DESC(adm1022_temp3, "List of adapter,address pairs "
"to enable 3rd temperature (ADM1022 only)");
/* Many THMC50 constants specified below */
/* The THMC50 registers */
#define THMC50_REG_CONF 0x40
#define THMC50_REG_COMPANY_ID 0x3E
#define THMC50_REG_DIE_CODE 0x3F
#define THMC50_REG_ANALOG_OUT 0x19
/*
* The mirror status register cannot be used as
* reading it does not clear alarms.
*/
#define THMC50_REG_INTR 0x41
static const u8 THMC50_REG_TEMP[] = { 0x27, 0x26, 0x20 };
static const u8 THMC50_REG_TEMP_MIN[] = { 0x3A, 0x38, 0x2C };
static const u8 THMC50_REG_TEMP_MAX[] = { 0x39, 0x37, 0x2B };
static const u8 THMC50_REG_TEMP_CRITICAL[] = { 0x13, 0x14, 0x14 };
static const u8 THMC50_REG_TEMP_DEFAULT[] = { 0x17, 0x18, 0x18 };
#define THMC50_REG_CONF_nFANOFF 0x20
#define THMC50_REG_CONF_PROGRAMMED 0x08
/* Each client has this additional data */
struct thmc50_data {
struct device *hwmon_dev;
struct mutex update_lock;
enum chips type;
unsigned long last_updated; /* In jiffies */
char has_temp3; /* !=0 if it is ADM1022 in temp3 mode */
char valid; /* !=0 if following fields are valid */
/* Register values */
s8 temp_input[3];
s8 temp_max[3];
s8 temp_min[3];
s8 temp_critical[3];
u8 analog_out;
u8 alarms;
};
static int thmc50_detect(struct i2c_client *client,
struct i2c_board_info *info);
static int thmc50_probe(struct i2c_client *client,
const struct i2c_device_id *id);
static int thmc50_remove(struct i2c_client *client);
static void thmc50_init_client(struct i2c_client *client);
static struct thmc50_data *thmc50_update_device(struct device *dev);
static const struct i2c_device_id thmc50_id[] = {
{ "adm1022", adm1022 },
{ "thmc50", thmc50 },
{ }
};
MODULE_DEVICE_TABLE(i2c, thmc50_id);
static struct i2c_driver thmc50_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "thmc50",
},
.probe = thmc50_probe,
.remove = thmc50_remove,
.id_table = thmc50_id,
.detect = thmc50_detect,
.address_list = normal_i2c,
};
static ssize_t show_analog_out(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct thmc50_data *data = thmc50_update_device(dev);
return sprintf(buf, "%d\n", data->analog_out);
}
static ssize_t set_analog_out(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct thmc50_data *data = i2c_get_clientdata(client);
int config;
unsigned long tmp;
int err;
err = kstrtoul(buf, 10, &tmp);
if (err)
return err;
mutex_lock(&data->update_lock);
data->analog_out = SENSORS_LIMIT(tmp, 0, 255);
i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
data->analog_out);
config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
if (data->analog_out == 0)
config &= ~THMC50_REG_CONF_nFANOFF;
else
config |= THMC50_REG_CONF_nFANOFF;
i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
mutex_unlock(&data->update_lock);
return count;
}
/* There is only one PWM mode = DC */
static ssize_t show_pwm_mode(struct device *dev, struct device_attribute *attr,
char *buf)
{
return sprintf(buf, "0\n");
}
/* Temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct thmc50_data *data = thmc50_update_device(dev);
return sprintf(buf, "%d\n", data->temp_input[nr] * 1000);
}
static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct thmc50_data *data = thmc50_update_device(dev);
return sprintf(buf, "%d\n", data->temp_min[nr] * 1000);
}
static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int nr = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct thmc50_data *data = i2c_get_clientdata(client);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->temp_min[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MIN[nr],
data->temp_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct thmc50_data *data = thmc50_update_device(dev);
return sprintf(buf, "%d\n", data->temp_max[nr] * 1000);
}
static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
int nr = to_sensor_dev_attr(attr)->index;
struct i2c_client *client = to_i2c_client(dev);
struct thmc50_data *data = i2c_get_clientdata(client);
long val;
int err;
err = kstrtol(buf, 10, &val);
if (err)
return err;
mutex_lock(&data->update_lock);
data->temp_max[nr] = SENSORS_LIMIT(val / 1000, -128, 127);
i2c_smbus_write_byte_data(client, THMC50_REG_TEMP_MAX[nr],
data->temp_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_temp_critical(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct thmc50_data *data = thmc50_update_device(dev);
return sprintf(buf, "%d\n", data->temp_critical[nr] * 1000);
}
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
char *buf)
{
int index = to_sensor_dev_attr(attr)->index;
struct thmc50_data *data = thmc50_update_device(dev);
return sprintf(buf, "%u\n", (data->alarms >> index) & 1);
}
#define temp_reg(offset) \
static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp, \
NULL, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
show_temp_min, set_temp_min, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
show_temp_max, set_temp_max, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_crit, S_IRUGO, \
show_temp_critical, NULL, offset - 1);
temp_reg(1);
temp_reg(2);
temp_reg(3);
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 5);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 1);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 7);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
static SENSOR_DEVICE_ATTR(pwm1, S_IRUGO | S_IWUSR, show_analog_out,
set_analog_out, 0);
static SENSOR_DEVICE_ATTR(pwm1_mode, S_IRUGO, show_pwm_mode, NULL, 0);
static struct attribute *thmc50_attributes[] = {
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_crit.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_pwm1.dev_attr.attr,
&sensor_dev_attr_pwm1_mode.dev_attr.attr,
NULL
};
static const struct attribute_group thmc50_group = {
.attrs = thmc50_attributes,
};
/* for ADM1022 3rd temperature mode */
static struct attribute *temp3_attributes[] = {
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_crit.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_fault.dev_attr.attr,
NULL
};
static const struct attribute_group temp3_group = {
.attrs = temp3_attributes,
};
/* Return 0 if detection is successful, -ENODEV otherwise */
static int thmc50_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
unsigned company;
unsigned revision;
unsigned config;
struct i2c_adapter *adapter = client->adapter;
const char *type_name;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
pr_debug("thmc50: detect failed, "
"smbus byte data not supported!\n");
return -ENODEV;
}
pr_debug("thmc50: Probing for THMC50 at 0x%2X on bus %d\n",
client->addr, i2c_adapter_id(client->adapter));
company = i2c_smbus_read_byte_data(client, THMC50_REG_COMPANY_ID);
revision = i2c_smbus_read_byte_data(client, THMC50_REG_DIE_CODE);
config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
if (revision < 0xc0 || (config & 0x10))
return -ENODEV;
if (company == 0x41) {
int id = i2c_adapter_id(client->adapter);
int i;
type_name = "adm1022";
for (i = 0; i + 1 < adm1022_temp3_num; i += 2)
if (adm1022_temp3[i] == id &&
adm1022_temp3[i + 1] == client->addr) {
/* enable 2nd remote temp */
config |= (1 << 7);
i2c_smbus_write_byte_data(client,
THMC50_REG_CONF,
config);
break;
}
} else if (company == 0x49) {
type_name = "thmc50";
} else {
pr_debug("thmc50: Detection of THMC50/ADM1022 failed\n");
return -ENODEV;
}
pr_debug("thmc50: Detected %s (version %x, revision %x)\n",
type_name, (revision >> 4) - 0xc, revision & 0xf);
strlcpy(info->type, type_name, I2C_NAME_SIZE);
return 0;
}
static int thmc50_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct thmc50_data *data;
int err;
data = devm_kzalloc(&client->dev, sizeof(struct thmc50_data),
GFP_KERNEL);
if (!data)
return -ENOMEM;
i2c_set_clientdata(client, data);
data->type = id->driver_data;
mutex_init(&data->update_lock);
thmc50_init_client(client);
/* Register sysfs hooks */
err = sysfs_create_group(&client->dev.kobj, &thmc50_group);
if (err)
return err;
/* Register ADM1022 sysfs hooks */
if (data->has_temp3) {
err = sysfs_create_group(&client->dev.kobj, &temp3_group);
if (err)
goto exit_remove_sysfs_thmc50;
}
/* Register a new directory entry with module sensors */
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove_sysfs;
}
return 0;
exit_remove_sysfs:
if (data->has_temp3)
sysfs_remove_group(&client->dev.kobj, &temp3_group);
exit_remove_sysfs_thmc50:
sysfs_remove_group(&client->dev.kobj, &thmc50_group);
return err;
}
static int thmc50_remove(struct i2c_client *client)
{
struct thmc50_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &thmc50_group);
if (data->has_temp3)
sysfs_remove_group(&client->dev.kobj, &temp3_group);
return 0;
}
static void thmc50_init_client(struct i2c_client *client)
{
struct thmc50_data *data = i2c_get_clientdata(client);
int config;
data->analog_out = i2c_smbus_read_byte_data(client,
THMC50_REG_ANALOG_OUT);
/* set up to at least 1 */
if (data->analog_out == 0) {
data->analog_out = 1;
i2c_smbus_write_byte_data(client, THMC50_REG_ANALOG_OUT,
data->analog_out);
}
config = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
config |= 0x1; /* start the chip if it is in standby mode */
if (data->type == adm1022 && (config & (1 << 7)))
data->has_temp3 = 1;
i2c_smbus_write_byte_data(client, THMC50_REG_CONF, config);
}
static struct thmc50_data *thmc50_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct thmc50_data *data = i2c_get_clientdata(client);
int timeout = HZ / 5 + (data->type == thmc50 ? HZ : 0);
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + timeout)
|| !data->valid) {
int temps = data->has_temp3 ? 3 : 2;
int i;
int prog = i2c_smbus_read_byte_data(client, THMC50_REG_CONF);
prog &= THMC50_REG_CONF_PROGRAMMED;
for (i = 0; i < temps; i++) {
data->temp_input[i] = i2c_smbus_read_byte_data(client,
THMC50_REG_TEMP[i]);
data->temp_max[i] = i2c_smbus_read_byte_data(client,
THMC50_REG_TEMP_MAX[i]);
data->temp_min[i] = i2c_smbus_read_byte_data(client,
THMC50_REG_TEMP_MIN[i]);
data->temp_critical[i] =
i2c_smbus_read_byte_data(client,
prog ? THMC50_REG_TEMP_CRITICAL[i]
: THMC50_REG_TEMP_DEFAULT[i]);
}
data->analog_out =
i2c_smbus_read_byte_data(client, THMC50_REG_ANALOG_OUT);
data->alarms =
i2c_smbus_read_byte_data(client, THMC50_REG_INTR);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
module_i2c_driver(thmc50_driver);
MODULE_AUTHOR("Krzysztof Helt <krzysztof.h1@wp.pl>");
MODULE_DESCRIPTION("THMC50 driver");