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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 <darrick.wong@oracle.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
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#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>
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/util_macros.h>
/* Addresses to scan */
static const unsigned short normal_i2c[] = { 0x2C, 0x2E, 0x2F, I2C_CLIENT_END };
/* 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_R1T_ALARM 0x01
#define ADT7470_R2T_ALARM 0x02
#define ADT7470_R3T_ALARM 0x04
#define ADT7470_R4T_ALARM 0x08
#define ADT7470_R5T_ALARM 0x10
#define ADT7470_R6T_ALARM 0x20
#define ADT7470_R7T_ALARM 0x40
#define ADT7470_OOL_ALARM 0x80
#define ADT7470_REG_ALARM2 0x42
#define ADT7470_R8T_ALARM 0x01
#define ADT7470_R9T_ALARM 0x02
#define ADT7470_R10T_ALARM 0x04
#define ADT7470_FAN1_ALARM 0x10
#define ADT7470_FAN2_ALARM 0x20
#define ADT7470_FAN3_ALARM 0x40
#define ADT7470_FAN4_ALARM 0x80
#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_PWM_AUTO_MASK 0xC0
#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_CFG_2 0x74
#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 ALARM2(x) ((x) << 8)
#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)
/* Wait at least 200ms per sensor for 10 sensors */
#define TEMP_COLLECTION_TIME 2000
/* auto update thing won't fire more than every 2s */
#define AUTO_UPDATE_INTERVAL 2000
/* 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)
/* Config registers 1 and 2 include fields for selecting the PWM frequency */
#define ADT7470_CFG_LF 0x40
#define ADT7470_FREQ_MASK 0x70
#define ADT7470_FREQ_SHIFT 4
struct adt7470_data {
struct i2c_client *client;
struct mutex lock;
char sensors_valid;
char limits_valid;
unsigned long sensors_last_updated; /* In jiffies */
unsigned long limits_last_updated; /* In jiffies */
int num_temp_sensors; /* -1 = probe */
int temperatures_probed;
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 alarm;
u16 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];
struct task_struct *auto_update;
unsigned int auto_update_interval;
};
/*
* 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);
}
/* Probe for temperature sensors. Assumes lock is held */
static int adt7470_read_temperatures(struct i2c_client *client,
struct adt7470_data *data)
{
unsigned long res;
int i;
u8 cfg, pwm[4], pwm_cfg[2];
/* save pwm[1-4] config register */
pwm_cfg[0] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(0));
pwm_cfg[1] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM_CFG(2));
/* set manual pwm to whatever it is set to now */
for (i = 0; i < ADT7470_FAN_COUNT; i++)
pwm[i] = i2c_smbus_read_byte_data(client, ADT7470_REG_PWM(i));
/* put pwm in manual mode */
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0),
pwm_cfg[0] & ~(ADT7470_PWM_AUTO_MASK));
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2),
pwm_cfg[1] & ~(ADT7470_PWM_AUTO_MASK));
/* write pwm control to whatever it was */
for (i = 0; i < ADT7470_FAN_COUNT; i++)
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM(i), pwm[i]);
/* 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 temp sensors. */
res = msleep_interruptible((data->num_temp_sensors >= 0 ?
data->num_temp_sensors * 200 :
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);
/* restore pwm[1-4] config registers */
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(0), pwm_cfg[0]);
i2c_smbus_write_byte_data(client, ADT7470_REG_PWM_CFG(2), pwm_cfg[1]);
if (res) {
pr_err("ha ha, interrupted\n");
return -EAGAIN;
}
/* Only count fans if we have to */
if (data->num_temp_sensors >= 0)
return 0;
for (i = 0; i < ADT7470_TEMP_COUNT; i++) {
data->temp[i] = i2c_smbus_read_byte_data(client,
ADT7470_TEMP_REG(i));
if (data->temp[i])
data->num_temp_sensors = i + 1;
}
data->temperatures_probed = 1;
return 0;
}
static int adt7470_update_thread(void *p)
{
struct i2c_client *client = p;
struct adt7470_data *data = i2c_get_clientdata(client);
while (!kthread_should_stop()) {
mutex_lock(&data->lock);
adt7470_read_temperatures(client, data);
mutex_unlock(&data->lock);
set_current_state(TASK_INTERRUPTIBLE);
if (kthread_should_stop())
break;
schedule_timeout(msecs_to_jiffies(data->auto_update_interval));
}
return 0;
}
static struct adt7470_data *adt7470_update_device(struct device *dev)
{
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
unsigned long local_jiffies = jiffies;
u8 cfg;
int i;
int need_sensors = 1;
int need_limits = 1;
/*
* Figure out if we need to update the shadow registers.
* Lockless means that we may occasionally report out of
* date data.
*/
if (time_before(local_jiffies, data->sensors_last_updated +
SENSOR_REFRESH_INTERVAL) &&
data->sensors_valid)
need_sensors = 0;
if (time_before(local_jiffies, data->limits_last_updated +
LIMIT_REFRESH_INTERVAL) &&
data->limits_valid)
need_limits = 0;
if (!need_sensors && !need_limits)
return data;
mutex_lock(&data->lock);
if (!need_sensors)
goto no_sensor_update;
if (!data->temperatures_probed)
adt7470_read_temperatures(client, data);
else
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->alarm = i2c_smbus_read_byte_data(client, ADT7470_REG_ALARM1);
if (data->alarm & ADT7470_OOL_ALARM)
data->alarm |= ALARM2(i2c_smbus_read_byte_data(client,
ADT7470_REG_ALARM2));
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 (!need_limits)
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 auto_update_interval_show(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->auto_update_interval);
}
static ssize_t auto_update_interval_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, 0, 60000);
mutex_lock(&data->lock);
data->auto_update_interval = temp;
mutex_unlock(&data->lock);
return count;
}
static ssize_t num_temp_sensors_show(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%d\n", data->num_temp_sensors);
}
static ssize_t num_temp_sensors_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, -1, 10);
mutex_lock(&data->lock);
data->num_temp_sensors = temp;
if (temp < 0)
data->temperatures_probed = 0;
mutex_unlock(&data->lock);
return count;
}
static ssize_t temp_min_show(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 temp_min_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, -128000, 127000);
temp = DIV_ROUND_CLOSEST(temp, 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 temp_max_show(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 temp_max_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, -128000, 127000);
temp = DIV_ROUND_CLOSEST(temp, 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 temp_show(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 alarm_mask_show(struct device *dev,
struct device_attribute *devattr,
char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
return sprintf(buf, "%x\n", data->alarms_mask);
}
static ssize_t alarm_mask_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
long mask;
if (kstrtoul(buf, 0, &mask))
return -EINVAL;
if (mask & ~0xffff)
return -EINVAL;
mutex_lock(&data->lock);
data->alarms_mask = mask;
adt7470_write_word_data(data->client, ADT7470_REG_ALARM1_MASK, mask);
mutex_unlock(&data->lock);
return count;
}
static ssize_t fan_max_show(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 fan_max_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp) || !temp)
return -EINVAL;
temp = FAN_RPM_TO_PERIOD(temp);
temp = clamp_val(temp, 1, 65534);
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 fan_min_show(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 fan_min_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp) || !temp)
return -EINVAL;
temp = FAN_RPM_TO_PERIOD(temp);
temp = clamp_val(temp, 1, 65534);
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 fan_show(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 force_pwm_max_show(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 force_pwm_max_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
u8 reg;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
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 pwm_show(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 pwm_store(struct device *dev, struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, 0, 255);
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;
}
/* These are the valid PWM frequencies to the nearest Hz */
static const int adt7470_freq_map[] = {
11, 15, 22, 29, 35, 44, 59, 88, 1400, 22500
};
static ssize_t pwm1_freq_show(struct device *dev,
struct device_attribute *devattr, char *buf)
{
struct adt7470_data *data = adt7470_update_device(dev);
unsigned char cfg_reg_1;
unsigned char cfg_reg_2;
int index;
mutex_lock(&data->lock);
cfg_reg_1 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG);
cfg_reg_2 = i2c_smbus_read_byte_data(data->client, ADT7470_REG_CFG_2);
mutex_unlock(&data->lock);
index = (cfg_reg_2 & ADT7470_FREQ_MASK) >> ADT7470_FREQ_SHIFT;
if (!(cfg_reg_1 & ADT7470_CFG_LF))
index += 8;
if (index >= ARRAY_SIZE(adt7470_freq_map))
index = ARRAY_SIZE(adt7470_freq_map) - 1;
return scnprintf(buf, PAGE_SIZE, "%d\n", adt7470_freq_map[index]);
}
static ssize_t pwm1_freq_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long freq;
int index;
int low_freq = ADT7470_CFG_LF;
unsigned char val;
if (kstrtol(buf, 10, &freq))
return -EINVAL;
/* Round the user value given to the closest available frequency */
index = find_closest(freq, adt7470_freq_map,
ARRAY_SIZE(adt7470_freq_map));
if (index >= 8) {
index -= 8;
low_freq = 0;
}
mutex_lock(&data->lock);
/* Configuration Register 1 */
val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG);
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG,
(val & ~ADT7470_CFG_LF) | low_freq);
/* Configuration Register 2 */
val = i2c_smbus_read_byte_data(client, ADT7470_REG_CFG_2);
i2c_smbus_write_byte_data(client, ADT7470_REG_CFG_2,
(val & ~ADT7470_FREQ_MASK) | (index << ADT7470_FREQ_SHIFT));
mutex_unlock(&data->lock);
return count;
}
static ssize_t pwm_max_show(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 pwm_max_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, 0, 255);
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 pwm_min_show(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 pwm_min_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, 0, 255);
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 pwm_tmax_show(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 pwm_tmin_show(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 pwm_tmin_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
long temp;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = clamp_val(temp, -128000, 127000);
temp = DIV_ROUND_CLOSEST(temp, 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 pwm_auto_show(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 pwm_auto_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int pwm_auto_reg = ADT7470_REG_PWM_CFG(attr->index);
int pwm_auto_reg_mask;
long temp;
u8 reg;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
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 pwm_auto_temp_show(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 || !is_power_of_2(input))
return -EINVAL;
return ilog2(input) + 1;
}
static ssize_t pwm_auto_temp_store(struct device *dev,
struct device_attribute *devattr,
const char *buf, size_t count)
{
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
struct adt7470_data *data = dev_get_drvdata(dev);
struct i2c_client *client = data->client;
int pwm_auto_reg = ADT7470_REG_PWM_AUTO_TEMP(attr->index);
long temp;
u8 reg;
if (kstrtol(buf, 10, &temp))
return -EINVAL;
temp = cvt_auto_temp(temp);
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 ssize_t alarm_show(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 (data->alarm & attr->index)
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static DEVICE_ATTR_RW(alarm_mask);
static DEVICE_ATTR_RW(num_temp_sensors);
static DEVICE_ATTR_RW(auto_update_interval);
static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0);
static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1);
static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2);
static SENSOR_DEVICE_ATTR_RW(temp4_max, temp_max, 3);
static SENSOR_DEVICE_ATTR_RW(temp5_max, temp_max, 4);
static SENSOR_DEVICE_ATTR_RW(temp6_max, temp_max, 5);
static SENSOR_DEVICE_ATTR_RW(temp7_max, temp_max, 6);
static SENSOR_DEVICE_ATTR_RW(temp8_max, temp_max, 7);
static SENSOR_DEVICE_ATTR_RW(temp9_max, temp_max, 8);
static SENSOR_DEVICE_ATTR_RW(temp10_max, temp_max, 9);
static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0);
static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1);
static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2);
static SENSOR_DEVICE_ATTR_RW(temp4_min, temp_min, 3);
static SENSOR_DEVICE_ATTR_RW(temp5_min, temp_min, 4);
static SENSOR_DEVICE_ATTR_RW(temp6_min, temp_min, 5);
static SENSOR_DEVICE_ATTR_RW(temp7_min, temp_min, 6);
static SENSOR_DEVICE_ATTR_RW(temp8_min, temp_min, 7);
static SENSOR_DEVICE_ATTR_RW(temp9_min, temp_min, 8);
static SENSOR_DEVICE_ATTR_RW(temp10_min, temp_min, 9);
static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0);
static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1);
static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2);
static SENSOR_DEVICE_ATTR_RO(temp4_input, temp, 3);
static SENSOR_DEVICE_ATTR_RO(temp5_input, temp, 4);
static SENSOR_DEVICE_ATTR_RO(temp6_input, temp, 5);
static SENSOR_DEVICE_ATTR_RO(temp7_input, temp, 6);
static SENSOR_DEVICE_ATTR_RO(temp8_input, temp, 7);
static SENSOR_DEVICE_ATTR_RO(temp9_input, temp, 8);
static SENSOR_DEVICE_ATTR_RO(temp10_input, temp, 9);
static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, ADT7470_R1T_ALARM);
static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, ADT7470_R2T_ALARM);
static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, ADT7470_R3T_ALARM);
static SENSOR_DEVICE_ATTR_RO(temp4_alarm, alarm, ADT7470_R4T_ALARM);
static SENSOR_DEVICE_ATTR_RO(temp5_alarm, alarm, ADT7470_R5T_ALARM);
static SENSOR_DEVICE_ATTR_RO(temp6_alarm, alarm, ADT7470_R6T_ALARM);
static SENSOR_DEVICE_ATTR_RO(temp7_alarm, alarm, ADT7470_R7T_ALARM);
static SENSOR_DEVICE_ATTR_RO(temp8_alarm, alarm, ALARM2(ADT7470_R8T_ALARM));
static SENSOR_DEVICE_ATTR_RO(temp9_alarm, alarm, ALARM2(ADT7470_R9T_ALARM));
static SENSOR_DEVICE_ATTR_RO(temp10_alarm, alarm, ALARM2(ADT7470_R10T_ALARM));
static SENSOR_DEVICE_ATTR_RW(fan1_max, fan_max, 0);
static SENSOR_DEVICE_ATTR_RW(fan2_max, fan_max, 1);
static SENSOR_DEVICE_ATTR_RW(fan3_max, fan_max, 2);
static SENSOR_DEVICE_ATTR_RW(fan4_max, fan_max, 3);
static SENSOR_DEVICE_ATTR_RW(fan1_min, fan_min, 0);
static SENSOR_DEVICE_ATTR_RW(fan2_min, fan_min, 1);
static SENSOR_DEVICE_ATTR_RW(fan3_min, fan_min, 2);
static SENSOR_DEVICE_ATTR_RW(fan4_min, fan_min, 3);
static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
static SENSOR_DEVICE_ATTR_RO(fan1_alarm, alarm, ALARM2(ADT7470_FAN1_ALARM));
static SENSOR_DEVICE_ATTR_RO(fan2_alarm, alarm, ALARM2(ADT7470_FAN2_ALARM));
static SENSOR_DEVICE_ATTR_RO(fan3_alarm, alarm, ALARM2(ADT7470_FAN3_ALARM));
static SENSOR_DEVICE_ATTR_RO(fan4_alarm, alarm, ALARM2(ADT7470_FAN4_ALARM));
static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0);
static SENSOR_DEVICE_ATTR_RW(pwm1, pwm, 0);
static SENSOR_DEVICE_ATTR_RW(pwm2, pwm, 1);
static SENSOR_DEVICE_ATTR_RW(pwm3, pwm, 2);
static SENSOR_DEVICE_ATTR_RW(pwm4, pwm, 3);
static DEVICE_ATTR_RW(pwm1_freq);
static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0);
static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1);
static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2);
static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3);
static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0);
static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1);
static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2);
static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3);
static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0);
static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1);
static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2);
static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3);
static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0);
static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1);
static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2);
static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3);
static SENSOR_DEVICE_ATTR_RW(pwm1_enable, pwm_auto, 0);
static SENSOR_DEVICE_ATTR_RW(pwm2_enable, pwm_auto, 1);
static SENSOR_DEVICE_ATTR_RW(pwm3_enable, pwm_auto, 2);
static SENSOR_DEVICE_ATTR_RW(pwm4_enable, pwm_auto, 3);
static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0);
static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1);
static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2);
static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3);
static struct attribute *adt7470_attrs[] = {
&dev_attr_alarm_mask.attr,
&dev_attr_num_temp_sensors.attr,
&dev_attr_auto_update_interval.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_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
&sensor_dev_attr_temp4_alarm.dev_attr.attr,
&sensor_dev_attr_temp5_alarm.dev_attr.attr,
&sensor_dev_attr_temp6_alarm.dev_attr.attr,
&sensor_dev_attr_temp7_alarm.dev_attr.attr,
&sensor_dev_attr_temp8_alarm.dev_attr.attr,
&sensor_dev_attr_temp9_alarm.dev_attr.attr,
&sensor_dev_attr_temp10_alarm.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_fan1_alarm.dev_attr.attr,
&sensor_dev_attr_fan2_alarm.dev_attr.attr,
&sensor_dev_attr_fan3_alarm.dev_attr.attr,
&sensor_dev_attr_fan4_alarm.dev_attr.attr,
&sensor_dev_attr_force_pwm_max.dev_attr.attr,
&sensor_dev_attr_pwm1.dev_attr.attr,
&dev_attr_pwm1_freq.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
};
ATTRIBUTE_GROUPS(adt7470);
/* Return 0 if detection is successful, -ENODEV otherwise */
static int adt7470_detect(struct i2c_client *client,
struct i2c_board_info *info)
{
struct i2c_adapter *adapter = client->adapter;
int vendor, device, revision;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
vendor = i2c_smbus_read_byte_data(client, ADT7470_REG_VENDOR);
if (vendor != ADT7470_VENDOR)
return -ENODEV;
device = i2c_smbus_read_byte_data(client, ADT7470_REG_DEVICE);
if (device != ADT7470_DEVICE)
return -ENODEV;
revision = i2c_smbus_read_byte_data(client, ADT7470_REG_REVISION);
if (revision != ADT7470_REVISION)
return -ENODEV;
strlcpy(info->type, "adt7470", I2C_NAME_SIZE);
return 0;
}
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 int adt7470_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct device *dev = &client->dev;
struct adt7470_data *data;
struct device *hwmon_dev;
data = devm_kzalloc(dev, sizeof(struct adt7470_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->num_temp_sensors = -1;
data->auto_update_interval = AUTO_UPDATE_INTERVAL;
i2c_set_clientdata(client, data);
data->client = client;
mutex_init(&data->lock);
dev_info(&client->dev, "%s chip found\n", client->name);
/* Initialize the ADT7470 chip */
adt7470_init_client(client);
/* Register sysfs hooks */
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
data,
adt7470_groups);
if (IS_ERR(hwmon_dev))
return PTR_ERR(hwmon_dev);
data->auto_update = kthread_run(adt7470_update_thread, client, "%s",
dev_name(hwmon_dev));
if (IS_ERR(data->auto_update)) {
return PTR_ERR(data->auto_update);
}
return 0;
}
static int adt7470_remove(struct i2c_client *client)
{
struct adt7470_data *data = i2c_get_clientdata(client);
kthread_stop(data->auto_update);
return 0;
}
static const struct i2c_device_id adt7470_id[] = {
{ "adt7470", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adt7470_id);
static struct i2c_driver adt7470_driver = {
.class = I2C_CLASS_HWMON,
.driver = {
.name = "adt7470",
},
.probe = adt7470_probe,
.remove = adt7470_remove,
.id_table = adt7470_id,
.detect = adt7470_detect,
.address_list = normal_i2c,
};
module_i2c_driver(adt7470_driver);
MODULE_AUTHOR("Darrick J. Wong <darrick.wong@oracle.com>");
MODULE_DESCRIPTION("ADT7470 driver");
MODULE_LICENSE("GPL");
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