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linux-sg2042/drivers/hwmon/adt7470.c

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/*
* A hwmon driver for the Analog Devices ADT7470
* Copyright (C) 2007 IBM
*
* Author: Darrick J. Wong <djwong@us.ibm.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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.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>
#include <linux/log2.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_1(adt7470);
/* ADT7470 registers */
#define ADT7470_REG_BASE_ADDR 0x20
#define ADT7470_REG_TEMP_BASE_ADDR 0x20
#define ADT7470_REG_TEMP_MAX_ADDR 0x29
#define ADT7470_REG_FAN_BASE_ADDR 0x2A
#define ADT7470_REG_FAN_MAX_ADDR 0x31
#define ADT7470_REG_PWM_BASE_ADDR 0x32
#define ADT7470_REG_PWM_MAX_ADDR 0x35
#define ADT7470_REG_PWM_MAX_BASE_ADDR 0x38
#define ADT7470_REG_PWM_MAX_MAX_ADDR 0x3B
#define ADT7470_REG_CFG 0x40
#define ADT7470_FSPD_MASK 0x04
#define ADT7470_REG_ALARM1 0x41
#define ADT7470_REG_ALARM2 0x42
#define ADT7470_REG_TEMP_LIMITS_BASE_ADDR 0x44
#define ADT7470_REG_TEMP_LIMITS_MAX_ADDR 0x57
#define ADT7470_REG_FAN_MIN_BASE_ADDR 0x58
#define ADT7470_REG_FAN_MIN_MAX_ADDR 0x5F
#define ADT7470_REG_FAN_MAX_BASE_ADDR 0x60
#define ADT7470_REG_FAN_MAX_MAX_ADDR 0x67
#define ADT7470_REG_PWM_CFG_BASE_ADDR 0x68
#define ADT7470_REG_PWM12_CFG 0x68
#define ADT7470_PWM2_AUTO_MASK 0x40
#define ADT7470_PWM1_AUTO_MASK 0x80
#define ADT7470_REG_PWM34_CFG 0x69
#define ADT7470_PWM3_AUTO_MASK 0x40
#define ADT7470_PWM4_AUTO_MASK 0x80
#define ADT7470_REG_PWM_MIN_BASE_ADDR 0x6A
#define ADT7470_REG_PWM_MIN_MAX_ADDR 0x6D
#define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR 0x6E
#define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR 0x71
#define ADT7470_REG_ACOUSTICS12 0x75
#define ADT7470_REG_ACOUSTICS34 0x76
#define ADT7470_REG_DEVICE 0x3D
#define ADT7470_REG_VENDOR 0x3E
#define ADT7470_REG_REVISION 0x3F
#define ADT7470_REG_ALARM1_MASK 0x72
#define ADT7470_REG_ALARM2_MASK 0x73
#define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR 0x7C
#define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR 0x7D
#define ADT7470_REG_MAX_ADDR 0x81
#define ADT7470_TEMP_COUNT 10
#define ADT7470_TEMP_REG(x) (ADT7470_REG_TEMP_BASE_ADDR + (x))
#define ADT7470_TEMP_MIN_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + ((x) * 2))
#define ADT7470_TEMP_MAX_REG(x) (ADT7470_REG_TEMP_LIMITS_BASE_ADDR + \
((x) * 2) + 1)
#define ADT7470_FAN_COUNT 4
#define ADT7470_REG_FAN(x) (ADT7470_REG_FAN_BASE_ADDR + ((x) * 2))
#define ADT7470_REG_FAN_MIN(x) (ADT7470_REG_FAN_MIN_BASE_ADDR + ((x) * 2))
#define ADT7470_REG_FAN_MAX(x) (ADT7470_REG_FAN_MAX_BASE_ADDR + ((x) * 2))
#define ADT7470_PWM_COUNT 4
#define ADT7470_REG_PWM(x) (ADT7470_REG_PWM_BASE_ADDR + (x))
#define ADT7470_REG_PWM_MAX(x) (ADT7470_REG_PWM_MAX_BASE_ADDR + (x))
#define ADT7470_REG_PWM_MIN(x) (ADT7470_REG_PWM_MIN_BASE_ADDR + (x))
#define ADT7470_REG_PWM_TMIN(x) (ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR + (x))
#define ADT7470_REG_PWM_CFG(x) (ADT7470_REG_PWM_CFG_BASE_ADDR + ((x) / 2))
#define ADT7470_REG_PWM_AUTO_TEMP(x) (ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR + \
((x) / 2))
#define ADT7470_VENDOR 0x41
#define ADT7470_DEVICE 0x70
/* datasheet only mentions a revision 2 */
#define ADT7470_REVISION 0x02
/* "all temps" according to hwmon sysfs interface spec */
#define ADT7470_PWM_ALL_TEMPS 0x3FF
/* How often do we reread sensors values? (In jiffies) */
#define SENSOR_REFRESH_INTERVAL (5 * HZ)
/* How often do we reread sensor limit values? (In jiffies) */
#define LIMIT_REFRESH_INTERVAL (60 * HZ)
/* sleep 1s while gathering temperature data */
#define TEMP_COLLECTION_TIME 1000
#define power_of_2(x) (((x) & ((x) - 1)) == 0)
/* datasheet says to divide this number by the fan reading to get fan rpm */
#define FAN_PERIOD_TO_RPM(x) ((90000 * 60) / (x))
#define FAN_RPM_TO_PERIOD FAN_PERIOD_TO_RPM
#define FAN_PERIOD_INVALID 65535
#define FAN_DATA_VALID(x) ((x) && (x) != FAN_PERIOD_INVALID)
struct adt7470_data {
struct i2c_client client;
struct device *hwmon_dev;
struct attribute_group attrs;
struct mutex lock;
char sensors_valid;
char limits_valid;
unsigned long sensors_last_updated; /* In jiffies */
unsigned long limits_last_updated; /* In jiffies */
s8 temp[ADT7470_TEMP_COUNT];
s8 temp_min[ADT7470_TEMP_COUNT];
s8 temp_max[ADT7470_TEMP_COUNT];
u16 fan[ADT7470_FAN_COUNT];
u16 fan_min[ADT7470_FAN_COUNT];
u16 fan_max[ADT7470_FAN_COUNT];
u16 alarms, alarms_mask;
u8 force_pwm_max;
u8 pwm[ADT7470_PWM_COUNT];
u8 pwm_max[ADT7470_PWM_COUNT];
u8 pwm_automatic[ADT7470_PWM_COUNT];
u8 pwm_min[ADT7470_PWM_COUNT];
s8 pwm_tmin[ADT7470_PWM_COUNT];
u8 pwm_auto_temp[ADT7470_PWM_COUNT];
};
static int adt7470_attach_adapter(struct i2c_adapter *adapter);
static int adt7470_detect(struct i2c_adapter *adapter, int address, int kind);
static int adt7470_detach_client(struct i2c_client *client);
static struct i2c_driver adt7470_driver = {
.driver = {
.name = "adt7470",
},
.attach_adapter = adt7470_attach_adapter,
.detach_client = adt7470_detach_client,
};
/*
* 16-bit registers on the ADT7470 are low-byte first. The data sheet says
* that the low byte must be read before the high byte.
*/
static inline int adt7470_read_word_data(struct i2c_client *client, u8 reg)
{
u16 foo;
foo = i2c_smbus_read_byte_data(client, reg);
foo |= ((u16)i2c_smbus_read_byte_data(client, reg + 1) << 8);
return foo;
}
static inline int adt7470_write_word_data(struct i2c_client *client, u8 reg,
u16 value)
{
return i2c_smbus_write_byte_data(client, reg, value & 0xFF)
&& i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
}
static void adt7470_init_client(struct i2c_client *client)
{
int reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
if (reg < 0) {
dev_err(&client->dev, "cannot read configuration register\n");
} else {
/* start monitoring (and do a self-test) */
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg | 3);
}
}
static struct adt7470_data *adt7470_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
unsigned long local_jiffies = jiffies;
u8 cfg;
int i;
mutex_lock(&data->lock);
if (time_before(local_jiffies, data->sensors_last_updated +
SENSOR_REFRESH_INTERVAL)
&& data->sensors_valid)
goto no_sensor_update;
/* start reading temperature sensors */
cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
cfg |= 0x80;
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
/*
* Delay is 200ms * number of tmp05 sensors. Too bad
* there's no way to figure out how many are connected.
* For now, assume 1s will work.
*/
msleep(TEMP_COLLECTION_TIME);
/* done reading temperature sensors */
cfg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
cfg &= ~0x80;
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, cfg);
for (i = 0; i < ADT7470_TEMP_COUNT; i++)
data->temp[i] = i2c_smbus_read_byte_data(client,
ADT7470_TEMP_REG(i));
for (i = 0; i < ADT7470_FAN_COUNT; i++)
data->fan[i] = adt7470_read_word_data(client,
ADT7470_REG_FAN(i));
for (i = 0; i < ADT7470_PWM_COUNT; i++) {
int reg;
int reg_mask;
data->pwm[i] = i2c_smbus_read_byte_data(client,
ADT7470_REG_PWM(i));
if (i % 2)
reg_mask = ADT7470_PWM2_AUTO_MASK;
else
reg_mask = ADT7470_PWM1_AUTO_MASK;
reg = ADT7470_REG_PWM_CFG(i);
if (i2c_smbus_read_byte_data(client, reg) & reg_mask)
data->pwm_automatic[i] = 1;
else
data->pwm_automatic[i] = 0;
reg = ADT7470_REG_PWM_AUTO_TEMP(i);
cfg = i2c_smbus_read_byte_data(client, reg);
if (!(i % 2))
data->pwm_auto_temp[i] = cfg >> 4;
else
data->pwm_auto_temp[i] = cfg & 0xF;
}
if (i2c_smbus_read_byte_data(client, ADT7470_REG_CFG) &
ADT7470_FSPD_MASK)
data->force_pwm_max = 1;
else
data->force_pwm_max = 0;
data->alarms = adt7470_read_word_data(client, ADT7470_REG_ALARM1);
data->alarms_mask = adt7470_read_word_data(client,
ADT7470_REG_ALARM1_MASK);
data->sensors_last_updated = local_jiffies;
data->sensors_valid = 1;
no_sensor_update:
if (time_before(local_jiffies, data->limits_last_updated +
LIMIT_REFRESH_INTERVAL)
&& data->limits_valid)
goto out;
for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
data->temp_min[i] = i2c_smbus_read_byte_data(client,
ADT7470_TEMP_MIN_REG(i));
data->temp_max[i] = i2c_smbus_read_byte_data(client,
ADT7470_TEMP_MAX_REG(i));
}
for (i = 0; i < ADT7470_FAN_COUNT; i++) {
data->fan_min[i] = adt7470_read_word_data(client,
ADT7470_REG_FAN_MIN(i));
data->fan_max[i] = adt7470_read_word_data(client,
ADT7470_REG_FAN_MAX(i));
}
for (i = 0; i < ADT7470_PWM_COUNT; i++) {
data->pwm_max[i] = i2c_smbus_read_byte_data(client,
ADT7470_REG_PWM_MAX(i));
data->pwm_min[i] = i2c_smbus_read_byte_data(client,
ADT7470_REG_PWM_MIN(i));
data->pwm_tmin[i] = i2c_smbus_read_byte_data(client,
ADT7470_REG_PWM_TMIN(i));
}
data->limits_last_updated = local_jiffies;
data->limits_valid = 1;
out:
mutex_unlock(&data->lock);
return data;
}
static ssize_t show_temp_min(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1000 * data->temp_min[attr->index]);
}
static ssize_t set_temp_min(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10) / 1000;
mutex_lock(&data->lock);
data->temp_min[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_TEMP_MIN_REG(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_temp_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1000 * data->temp_max[attr->index]);
}
static ssize_t set_temp_max(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10) / 1000;
mutex_lock(&data->lock);
data->temp_max[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_TEMP_MAX_REG(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_temp(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1000 * data->temp[attr->index]);
}
static ssize_t show_alarms(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
if (attr->index)
return sprintf(buf, "%x\n", data->alarms);
else
return sprintf(buf, "%x\n", data->alarms_mask);
}
static ssize_t show_fan_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
if (FAN_DATA_VALID(data->fan_max[attr->index]))
return sprintf(buf, "%d\n",
FAN_PERIOD_TO_RPM(data->fan_max[attr->index]));
else
return sprintf(buf, "0\n");
}
static ssize_t set_fan_max(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10);
if (!temp)
return -EINVAL;
temp = FAN_RPM_TO_PERIOD(temp);
mutex_lock(&data->lock);
data->fan_max[attr->index] = temp;
adt7470_write_word_data(client, ADT7470_REG_FAN_MAX(attr->index), temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_fan_min(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
if (FAN_DATA_VALID(data->fan_min[attr->index]))
return sprintf(buf, "%d\n",
FAN_PERIOD_TO_RPM(data->fan_min[attr->index]));
else
return sprintf(buf, "0\n");
}
static ssize_t set_fan_min(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10);
if (!temp)
return -EINVAL;
temp = FAN_RPM_TO_PERIOD(temp);
mutex_lock(&data->lock);
data->fan_min[attr->index] = temp;
adt7470_write_word_data(client, ADT7470_REG_FAN_MIN(attr->index), temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_fan(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
if (FAN_DATA_VALID(data->fan[attr->index]))
return sprintf(buf, "%d\n",
FAN_PERIOD_TO_RPM(data->fan[attr->index]));
else
return sprintf(buf, "0\n");
}
static ssize_t show_force_pwm_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->force_pwm_max);
}
static ssize_t set_force_pwm_max(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10);
u8 reg;
mutex_lock(&data->lock);
data->force_pwm_max = temp;
reg = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
if (temp)
reg |= ADT7470_FSPD_MASK;
else
reg &= ~ADT7470_FSPD_MASK;
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG, reg);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm(struct device *dev, struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->pwm[attr->index]);
}
static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10);
mutex_lock(&data->lock);
data->pwm[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(attr->index), temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_max(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->pwm_max[attr->index]);
}
static ssize_t set_pwm_max(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10);
mutex_lock(&data->lock);
data->pwm_max[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MAX(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_min(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->pwm_min[attr->index]);
}
static ssize_t set_pwm_min(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10);
mutex_lock(&data->lock);
data->pwm_min[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_MIN(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_tmax(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
/* the datasheet says that tmax = tmin + 20C */
return sprintf(buf, "%d\n", 1000 * (20 + data->pwm_tmin[attr->index]));
}
static ssize_t show_pwm_tmin(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1000 * data->pwm_tmin[attr->index]);
}
static ssize_t set_pwm_tmin(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10) / 1000;
mutex_lock(&data->lock);
data->pwm_tmin[attr->index] = temp;
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_TMIN(attr->index),
temp);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_auto(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", 1 + data->pwm_automatic[attr->index]);
}
static ssize_t set_pwm_auto(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = simple_strtol(buf, NULL, 10);
int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
int pwm_auto_reg_mask;
u8 reg;
if (attr->index % 2)
pwm_auto_reg_mask = ADT7470_PWM2_AUTO_MASK;
else
pwm_auto_reg_mask = ADT7470_PWM1_AUTO_MASK;
if (temp != 2 && temp != 1)
return -EINVAL;
temp--;
mutex_lock(&data->lock);
data->pwm_automatic[attr->index] = temp;
reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
if (temp)
reg |= pwm_auto_reg_mask;
else
reg &= ~pwm_auto_reg_mask;
i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
mutex_unlock(&data->lock);
return count;
}
static ssize_t show_pwm_auto_temp(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = adt7470_update_device(dev);
u8 ctrl = data->pwm_auto_temp[attr->index];
if (ctrl)
return sprintf(buf, "%d\n", 1 << (ctrl - 1));
else
return sprintf(buf, "%d\n", ADT7470_PWM_ALL_TEMPS);
}
static int cvt_auto_temp(int input)
{
if (input == ADT7470_PWM_ALL_TEMPS)
return 0;
if (input < 1 || !power_of_2(input))
return -EINVAL;
return ilog2(input) + 1;
}
static ssize_t set_pwm_auto_temp(struct device *dev,
struct device_attribute *devattr,
const char *buf,
size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct i2c_client *client = to_i2c_client(dev);
struct adt7470_data *data = i2c_get_clientdata(client);
int temp = cvt_auto_temp(simple_strtol(buf, NULL, 10));
int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
u8 reg;
if (temp < 0)
return temp;
mutex_lock(&data->lock);
data->pwm_automatic[attr->index] = temp;
reg = i2c_smbus_read_byte_data(client, pwm_auto_reg);
if (!(attr->index % 2)) {
reg &= 0xF;
reg |= (temp << 4) & 0xF0;
} else {
reg &= 0xF0;
reg |= temp & 0xF;
}
i2c_smbus_write_byte_data(client, pwm_auto_reg, reg);
mutex_unlock(&data->lock);
return count;
}
static SENSOR_DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL, 0);
static SENSOR_DEVICE_ATTR(alarm_mask, S_IRUGO, show_alarms, NULL, 1);
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 0);
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 1);
static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 2);
static SENSOR_DEVICE_ATTR(temp4_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 3);
static SENSOR_DEVICE_ATTR(temp5_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 4);
static SENSOR_DEVICE_ATTR(temp6_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 5);
static SENSOR_DEVICE_ATTR(temp7_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 6);
static SENSOR_DEVICE_ATTR(temp8_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 7);
static SENSOR_DEVICE_ATTR(temp9_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 8);
static SENSOR_DEVICE_ATTR(temp10_max, S_IWUSR | S_IRUGO, show_temp_max,
set_temp_max, 9);
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 0);
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 1);
static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 2);
static SENSOR_DEVICE_ATTR(temp4_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 3);
static SENSOR_DEVICE_ATTR(temp5_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 4);
static SENSOR_DEVICE_ATTR(temp6_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 5);
static SENSOR_DEVICE_ATTR(temp7_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 6);
static SENSOR_DEVICE_ATTR(temp8_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 7);
static SENSOR_DEVICE_ATTR(temp9_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 8);
static SENSOR_DEVICE_ATTR(temp10_min, S_IWUSR | S_IRUGO, show_temp_min,
set_temp_min, 9);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp, NULL, 1);
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp, NULL, 2);
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp, NULL, 3);
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp, NULL, 4);
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp, NULL, 5);
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp, NULL, 6);
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp, NULL, 7);
static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_temp, NULL, 8);
static SENSOR_DEVICE_ATTR(temp10_input, S_IRUGO, show_temp, NULL, 9);
static SENSOR_DEVICE_ATTR(fan1_max, S_IWUSR | S_IRUGO, show_fan_max,
set_fan_max, 0);
static SENSOR_DEVICE_ATTR(fan2_max, S_IWUSR | S_IRUGO, show_fan_max,
set_fan_max, 1);
static SENSOR_DEVICE_ATTR(fan3_max, S_IWUSR | S_IRUGO, show_fan_max,
set_fan_max, 2);
static SENSOR_DEVICE_ATTR(fan4_max, S_IWUSR | S_IRUGO, show_fan_max,
set_fan_max, 3);
static SENSOR_DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min,
set_fan_min, 0);
static SENSOR_DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min,
set_fan_min, 1);
static SENSOR_DEVICE_ATTR(fan3_min, S_IWUSR | S_IRUGO, show_fan_min,
set_fan_min, 2);
static SENSOR_DEVICE_ATTR(fan4_min, S_IWUSR | S_IRUGO, show_fan_min,
set_fan_min, 3);
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
static SENSOR_DEVICE_ATTR(force_pwm_max, S_IWUSR | S_IRUGO,
show_force_pwm_max, set_force_pwm_max, 0);
static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 0);
static SENSOR_DEVICE_ATTR(pwm2, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 1);
static SENSOR_DEVICE_ATTR(pwm3, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 2);
static SENSOR_DEVICE_ATTR(pwm4, S_IWUSR | S_IRUGO, show_pwm, set_pwm, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm_min, set_pwm_min, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm_min, set_pwm_min, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm_min, set_pwm_min, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point1_pwm, S_IWUSR | S_IRUGO,
show_pwm_min, set_pwm_min, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm_max, set_pwm_max, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm_max, set_pwm_max, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm_max, set_pwm_max, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point2_pwm, S_IWUSR | S_IRUGO,
show_pwm_max, set_pwm_max, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_temp, S_IWUSR | S_IRUGO,
show_pwm_tmin, set_pwm_tmin, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point1_temp, S_IWUSR | S_IRUGO,
show_pwm_tmin, set_pwm_tmin, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point1_temp, S_IWUSR | S_IRUGO,
show_pwm_tmin, set_pwm_tmin, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point1_temp, S_IWUSR | S_IRUGO,
show_pwm_tmin, set_pwm_tmin, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_temp, S_IRUGO, show_pwm_tmax,
NULL, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_point2_temp, S_IRUGO, show_pwm_tmax,
NULL, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_point2_temp, S_IRUGO, show_pwm_tmax,
NULL, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_point2_temp, S_IRUGO, show_pwm_tmax,
NULL, 3);
static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
set_pwm_auto, 0);
static SENSOR_DEVICE_ATTR(pwm2_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
set_pwm_auto, 1);
static SENSOR_DEVICE_ATTR(pwm3_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
set_pwm_auto, 2);
static SENSOR_DEVICE_ATTR(pwm4_enable, S_IWUSR | S_IRUGO, show_pwm_auto,
set_pwm_auto, 3);
static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IWUSR | S_IRUGO,
show_pwm_auto_temp, set_pwm_auto_temp, 0);
static SENSOR_DEVICE_ATTR(pwm2_auto_channels_temp, S_IWUSR | S_IRUGO,
show_pwm_auto_temp, set_pwm_auto_temp, 1);
static SENSOR_DEVICE_ATTR(pwm3_auto_channels_temp, S_IWUSR | S_IRUGO,
show_pwm_auto_temp, set_pwm_auto_temp, 2);
static SENSOR_DEVICE_ATTR(pwm4_auto_channels_temp, S_IWUSR | S_IRUGO,
show_pwm_auto_temp, set_pwm_auto_temp, 3);
static struct attribute *adt7470_attr[] =
{
&sensor_dev_attr_alarms.dev_attr.attr,
&sensor_dev_attr_alarm_mask.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp4_max.dev_attr.attr,
&sensor_dev_attr_temp5_max.dev_attr.attr,
&sensor_dev_attr_temp6_max.dev_attr.attr,
&sensor_dev_attr_temp7_max.dev_attr.attr,
&sensor_dev_attr_temp8_max.dev_attr.attr,
&sensor_dev_attr_temp9_max.dev_attr.attr,
&sensor_dev_attr_temp10_max.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp4_min.dev_attr.attr,
&sensor_dev_attr_temp5_min.dev_attr.attr,
&sensor_dev_attr_temp6_min.dev_attr.attr,
&sensor_dev_attr_temp7_min.dev_attr.attr,
&sensor_dev_attr_temp8_min.dev_attr.attr,
&sensor_dev_attr_temp9_min.dev_attr.attr,
&sensor_dev_attr_temp10_min.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp4_input.dev_attr.attr,
&sensor_dev_attr_temp5_input.dev_attr.attr,
&sensor_dev_attr_temp6_input.dev_attr.attr,
&sensor_dev_attr_temp7_input.dev_attr.attr,
&sensor_dev_attr_temp8_input.dev_attr.attr,
&sensor_dev_attr_temp9_input.dev_attr.attr,
&sensor_dev_attr_temp10_input.dev_attr.attr,
&sensor_dev_attr_fan1_max.dev_attr.attr,
&sensor_dev_attr_fan2_max.dev_attr.attr,
&sensor_dev_attr_fan3_max.dev_attr.attr,
&sensor_dev_attr_fan4_max.dev_attr.attr,
&sensor_dev_attr_fan1_min.dev_attr.attr,
&sensor_dev_attr_fan2_min.dev_attr.attr,
&sensor_dev_attr_fan3_min.dev_attr.attr,
&sensor_dev_attr_fan4_min.dev_attr.attr,
&sensor_dev_attr_fan1_input.dev_attr.attr,
&sensor_dev_attr_fan2_input.dev_attr.attr,
&sensor_dev_attr_fan3_input.dev_attr.attr,
&sensor_dev_attr_fan4_input.dev_attr.attr,
&sensor_dev_attr_force_pwm_max.dev_attr.attr,
&sensor_dev_attr_pwm1.dev_attr.attr,
&sensor_dev_attr_pwm2.dev_attr.attr,
&sensor_dev_attr_pwm3.dev_attr.attr,
&sensor_dev_attr_pwm4.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_point1_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_point2_pwm.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_point1_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_point2_temp.dev_attr.attr,
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
&sensor_dev_attr_pwm2_enable.dev_attr.attr,
&sensor_dev_attr_pwm3_enable.dev_attr.attr,
&sensor_dev_attr_pwm4_enable.dev_attr.attr,
&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm2_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm3_auto_channels_temp.dev_attr.attr,
&sensor_dev_attr_pwm4_auto_channels_temp.dev_attr.attr,
NULL
};
static int adt7470_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, adt7470_detect);
}
static int adt7470_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *client;
struct adt7470_data *data;
int err = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kzalloc(sizeof(struct adt7470_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
client = &data->client;
client->addr = address;
client->adapter = adapter;
client->driver = &adt7470_driver;
i2c_set_clientdata(client, data);
mutex_init(&data->lock);
if (kind <= 0) {
int vendor, device, revision;
vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
if (vendor != ADT7470_VENDOR) {
err = -ENODEV;
goto exit_free;
}
device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
if (device != ADT7470_DEVICE) {
err = -ENODEV;
goto exit_free;
}
revision = i2c_smbus_read_byte_data(client,
ADT7470_REG_REVISION);
if (revision != ADT7470_REVISION) {
err = -ENODEV;
goto exit_free;
}
} else
dev_dbg(&adapter->dev, "detection forced\n");
strlcpy(client->name, "adt7470", I2C_NAME_SIZE);
if ((err = i2c_attach_client(client)))
goto exit_free;
dev_info(&client->dev, "%s chip found\n", client->name);
/* Initialize the ADT7470 chip */
adt7470_init_client(client);
/* Register sysfs hooks */
data->attrs.attrs = adt7470_attr;
if ((err = sysfs_create_group(&client->dev.kobj, &data->attrs)))
goto exit_detach;
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove;
}
return 0;
exit_remove:
sysfs_remove_group(&client->dev.kobj, &data->attrs);
exit_detach:
i2c_detach_client(client);
exit_free:
kfree(data);
exit:
return err;
}
static int adt7470_detach_client(struct i2c_client *client)
{
struct adt7470_data *data = i2c_get_clientdata(client);
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &data->attrs);
i2c_detach_client(client);
kfree(data);
return 0;
}
static int __init adt7470_init(void)
{
return i2c_add_driver(&adt7470_driver);
}
static void __exit adt7470_exit(void)
{
i2c_del_driver(&adt7470_driver);
}
MODULE_AUTHOR("Darrick J. Wong <djwong@us.ibm.com>");
MODULE_DESCRIPTION("ADT7470 driver");
MODULE_LICENSE("GPL");
module_init(adt7470_init);
module_exit(adt7470_exit);
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