/*
smsc47m192.c - Support for hardware monitoring block of
SMSC LPC47M192 and compatible Super I/O chips
Copyright (C) 2006 Hartmut Rick <linux@rick.claranet.de>
Derived from lm78.c and other chip drivers.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
#include <linux/i2c.h>
#include <linux/hwmon.h>
#include <linux/hwmon-sysfs.h>
#include <linux/hwmon-vid.h>
#include <linux/err.h>
#include <linux/sysfs.h>
#include <linux/mutex.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_1(smsc47m192);
/* SMSC47M192 registers */
#define SMSC47M192_REG_IN(nr) ((nr)<6 ? (0x20 + (nr)) : \
(0x50 + (nr) - 6))
#define SMSC47M192_REG_IN_MAX(nr) ((nr)<6 ? (0x2b + (nr) * 2) : \
(0x54 + (((nr) - 6) * 2)))
#define SMSC47M192_REG_IN_MIN(nr) ((nr)<6 ? (0x2c + (nr) * 2) : \
(0x55 + (((nr) - 6) * 2)))
static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 };
static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 };
static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 };
#define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr)==2 ? 0x1e : 0x1f)
#define SMSC47M192_REG_ALARM1 0x41
#define SMSC47M192_REG_ALARM2 0x42
#define SMSC47M192_REG_VID 0x47
#define SMSC47M192_REG_VID4 0x49
#define SMSC47M192_REG_CONFIG 0x40
#define SMSC47M192_REG_SFR 0x4f
#define SMSC47M192_REG_COMPANY_ID 0x3e
#define SMSC47M192_REG_VERSION 0x3f
/* generalised scaling with integer rounding */
static inline int SCALE(long val, int mul, int div)
{
if (val < 0)
return (val * mul - div / 2) / div;
else
return (val * mul + div / 2) / div;
}
/* Conversions */
/* smsc47m192 internally scales voltage measurements */
static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 };
static inline unsigned int IN_FROM_REG(u8 reg, int n)
{
return SCALE(reg, nom_mv[n], 192);
}
static inline u8 IN_TO_REG(unsigned long val, int n)
{
return SENSORS_LIMIT(SCALE(val, 192, nom_mv[n]), 0, 255);
}
/* TEMP: 0.001 degC units (-128C to +127C)
REG: 1C/bit, two's complement */
static inline s8 TEMP_TO_REG(int val)
{
return SENSORS_LIMIT(SCALE(val, 1, 1000), -128000, 127000);
}
static inline int TEMP_FROM_REG(s8 val)
{
return val * 1000;
}
struct smsc47m192_data {
struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 in[8]; /* Register value */
u8 in_max[8]; /* Register value */
u8 in_min[8]; /* Register value */
s8 temp[3]; /* Register value */
s8 temp_max[3]; /* Register value */
s8 temp_min[3]; /* Register value */
s8 temp_offset[3]; /* Register value */
u16 alarms; /* Register encoding, combined */
u8 vid; /* Register encoding, combined */
u8 vrm;
};
static int smsc47m192_attach_adapter(struct i2c_adapter *adapter);
static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
int kind);
static int smsc47m192_detach_client(struct i2c_client *client);
static struct smsc47m192_data *smsc47m192_update_device(struct device *dev);
static struct i2c_driver smsc47m192_driver = {
.driver = {
.name = "smsc47m192",
},
.attach_adapter = smsc47m192_attach_adapter,
.detach_client = smsc47m192_detach_client,
};
/* Voltages */
static ssize_t show_in(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr));
}
static ssize_t show_in_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr));
}
static ssize_t show_in_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr));
}
static ssize_t set_in_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_min[nr] = IN_TO_REG(val, nr);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr),
data->in_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_in_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
unsigned long val = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->in_max[nr] = IN_TO_REG(val, nr);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr),
data->in_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
#define show_in_offset(offset) \
static SENSOR_DEVICE_ATTR(in##offset##_input, S_IRUGO, \
show_in, NULL, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
show_in_min, set_in_min, offset); \
static SENSOR_DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
show_in_max, set_in_max, offset);
show_in_offset(0)
show_in_offset(1)
show_in_offset(2)
show_in_offset(3)
show_in_offset(4)
show_in_offset(5)
show_in_offset(6)
show_in_offset(7)
/* Temperatures */
static ssize_t show_temp(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr]));
}
static ssize_t show_temp_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr]));
}
static ssize_t show_temp_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr]));
}
static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_min[nr] = TEMP_TO_REG(val);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr],
data->temp_min[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_max[nr] = TEMP_TO_REG(val);
i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr],
data->temp_max[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_temp_offset(struct device *dev, struct device_attribute
*attr, char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr]));
}
static ssize_t set_temp_offset(struct device *dev, struct device_attribute
*attr, const char *buf, size_t count)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
long val = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_offset[nr] = TEMP_TO_REG(val);
if (nr>1)
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
else if (data->temp_offset[nr] != 0) {
/* offset[0] and offset[1] share the same register,
SFR bit 4 activates offset[0] */
i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
(sfr & 0xef) | (nr==0 ? 0x10 : 0));
data->temp_offset[1-nr] = 0;
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]);
} else if ((sfr & 0x10) == (nr==0 ? 0x10 : 0))
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(nr), 0);
mutex_unlock(&data->update_lock);
return count;
}
#define show_temp_index(index) \
static SENSOR_DEVICE_ATTR(temp##index##_input, S_IRUGO, \
show_temp, NULL, index-1); \
static SENSOR_DEVICE_ATTR(temp##index##_min, S_IRUGO | S_IWUSR, \
show_temp_min, set_temp_min, index-1); \
static SENSOR_DEVICE_ATTR(temp##index##_max, S_IRUGO | S_IWUSR, \
show_temp_max, set_temp_max, index-1); \
static SENSOR_DEVICE_ATTR(temp##index##_offset, S_IRUGO | S_IWUSR, \
show_temp_offset, set_temp_offset, index-1);
show_temp_index(1)
show_temp_index(2)
show_temp_index(3)
/* VID */
static ssize_t show_vid(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm));
}
static DEVICE_ATTR(cpu0_vid, S_IRUGO, show_vid, NULL);
static ssize_t show_vrm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%d\n", data->vrm);
}
static ssize_t set_vrm(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
data->vrm = simple_strtoul(buf, NULL, 10);
return count;
}
static DEVICE_ATTR(vrm, S_IRUGO | S_IWUSR, show_vrm, set_vrm);
/* Alarms */
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
int nr = sensor_attr->index;
struct smsc47m192_data *data = smsc47m192_update_device(dev);
return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0);
}
static SENSOR_DEVICE_ATTR(temp1_alarm, S_IRUGO, show_alarm, NULL, 0x0010);
static SENSOR_DEVICE_ATTR(temp2_alarm, S_IRUGO, show_alarm, NULL, 0x0020);
static SENSOR_DEVICE_ATTR(temp3_alarm, S_IRUGO, show_alarm, NULL, 0x0040);
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 0x4000);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 0x8000);
static SENSOR_DEVICE_ATTR(in0_alarm, S_IRUGO, show_alarm, NULL, 0x0001);
static SENSOR_DEVICE_ATTR(in1_alarm, S_IRUGO, show_alarm, NULL, 0x0002);
static SENSOR_DEVICE_ATTR(in2_alarm, S_IRUGO, show_alarm, NULL, 0x0004);
static SENSOR_DEVICE_ATTR(in3_alarm, S_IRUGO, show_alarm, NULL, 0x0008);
static SENSOR_DEVICE_ATTR(in4_alarm, S_IRUGO, show_alarm, NULL, 0x0100);
static SENSOR_DEVICE_ATTR(in5_alarm, S_IRUGO, show_alarm, NULL, 0x0200);
static SENSOR_DEVICE_ATTR(in6_alarm, S_IRUGO, show_alarm, NULL, 0x0400);
static SENSOR_DEVICE_ATTR(in7_alarm, S_IRUGO, show_alarm, NULL, 0x0800);
static struct attribute *smsc47m192_attributes[] = {
&sensor_dev_attr_in0_input.dev_attr.attr,
&sensor_dev_attr_in0_min.dev_attr.attr,
&sensor_dev_attr_in0_max.dev_attr.attr,
&sensor_dev_attr_in0_alarm.dev_attr.attr,
&sensor_dev_attr_in1_input.dev_attr.attr,
&sensor_dev_attr_in1_min.dev_attr.attr,
&sensor_dev_attr_in1_max.dev_attr.attr,
&sensor_dev_attr_in1_alarm.dev_attr.attr,
&sensor_dev_attr_in2_input.dev_attr.attr,
&sensor_dev_attr_in2_min.dev_attr.attr,
&sensor_dev_attr_in2_max.dev_attr.attr,
&sensor_dev_attr_in2_alarm.dev_attr.attr,
&sensor_dev_attr_in3_input.dev_attr.attr,
&sensor_dev_attr_in3_min.dev_attr.attr,
&sensor_dev_attr_in3_max.dev_attr.attr,
&sensor_dev_attr_in3_alarm.dev_attr.attr,
&sensor_dev_attr_in5_input.dev_attr.attr,
&sensor_dev_attr_in5_min.dev_attr.attr,
&sensor_dev_attr_in5_max.dev_attr.attr,
&sensor_dev_attr_in5_alarm.dev_attr.attr,
&sensor_dev_attr_in6_input.dev_attr.attr,
&sensor_dev_attr_in6_min.dev_attr.attr,
&sensor_dev_attr_in6_max.dev_attr.attr,
&sensor_dev_attr_in6_alarm.dev_attr.attr,
&sensor_dev_attr_in7_input.dev_attr.attr,
&sensor_dev_attr_in7_min.dev_attr.attr,
&sensor_dev_attr_in7_max.dev_attr.attr,
&sensor_dev_attr_in7_alarm.dev_attr.attr,
&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_offset.dev_attr.attr,
&sensor_dev_attr_temp1_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_offset.dev_attr.attr,
&sensor_dev_attr_temp2_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_fault.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp3_offset.dev_attr.attr,
&sensor_dev_attr_temp3_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_fault.dev_attr.attr,
&dev_attr_cpu0_vid.attr,
&dev_attr_vrm.attr,
NULL
};
static const struct attribute_group smsc47m192_group = {
.attrs = smsc47m192_attributes,
};
static struct attribute *smsc47m192_attributes_in4[] = {
&sensor_dev_attr_in4_input.dev_attr.attr,
&sensor_dev_attr_in4_min.dev_attr.attr,
&sensor_dev_attr_in4_max.dev_attr.attr,
&sensor_dev_attr_in4_alarm.dev_attr.attr,
NULL
};
static const struct attribute_group smsc47m192_group_in4 = {
.attrs = smsc47m192_attributes_in4,
};
/* This function is called when:
* smsc47m192_driver is inserted (when this module is loaded), for each
available adapter
* when a new adapter is inserted (and smsc47m192_driver is still present) */
static int smsc47m192_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, smsc47m192_detect);
}
static void smsc47m192_init_client(struct i2c_client *client)
{
int i;
u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
/* select cycle mode (pause 1 sec between updates) */
i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR,
(sfr & 0xfd) | 0x02);
if (!(config & 0x01)) {
/* initialize alarm limits */
for (i=0; i<8; i++) {
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_IN_MIN(i), 0);
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_IN_MAX(i), 0xff);
}
for (i=0; i<3; i++) {
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_MIN[i], 0x80);
i2c_smbus_write_byte_data(client,
SMSC47M192_REG_TEMP_MAX[i], 0x7f);
}
/* start monitoring */
i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG,
(config & 0xf7) | 0x01);
}
}
/* This function is called by i2c_probe */
static int smsc47m192_detect(struct i2c_adapter *adapter, int address,
int kind)
{
struct i2c_client *client;
struct smsc47m192_data *data;
int err = 0;
int version, config;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
if (!(data = kzalloc(sizeof(struct smsc47m192_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = address;
client->adapter = adapter;
client->driver = &smsc47m192_driver;
if (kind == 0)
kind = smsc47m192;
/* Detection criteria from sensors_detect script */
if (kind < 0) {
if (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_COMPANY_ID) == 0x55
&& ((version = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VERSION)) & 0xf0) == 0x20
&& (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VID) & 0x70) == 0x00
&& (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VID4) & 0xfe) == 0x80) {
dev_info(&adapter->dev,
"found SMSC47M192 or compatible, "
"version 2, stepping A%d\n", version & 0x0f);
} else {
dev_dbg(&adapter->dev,
"SMSC47M192 detection failed at 0x%02x\n",
address);
goto exit_free;
}
}
/* Fill in the remaining client fields and put into the global list */
strlcpy(client->name, "smsc47m192", I2C_NAME_SIZE);
data->vrm = vid_which_vrm();
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(client)))
goto exit_free;
/* Initialize the SMSC47M192 chip */
smsc47m192_init_client(client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&client->dev.kobj, &smsc47m192_group)))
goto exit_detach;
/* Pin 110 is either in4 (+12V) or VID4 */
config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG);
if (!(config & 0x20)) {
if ((err = sysfs_create_group(&client->dev.kobj,
&smsc47m192_group_in4)))
goto exit_remove_files;
}
data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto exit_remove_files;
}
return 0;
exit_remove_files:
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
exit_detach:
i2c_detach_client(client);
exit_free:
kfree(data);
exit:
return err;
}
static int smsc47m192_detach_client(struct i2c_client *client)
{
struct smsc47m192_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->hwmon_dev);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group);
sysfs_remove_group(&client->dev.kobj, &smsc47m192_group_in4);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;
}
static struct smsc47m192_data *smsc47m192_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct smsc47m192_data *data = i2c_get_clientdata(client);
int i, config;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + HZ + HZ / 2)
|| !data->valid) {
u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR);
dev_dbg(&client->dev, "Starting smsc47m192 update\n");
for (i = 0; i <= 7; i++) {
data->in[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_IN(i));
data->in_min[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_IN_MIN(i));
data->in_max[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_IN_MAX(i));
}
for (i = 0; i < 3; i++) {
data->temp[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP[i]);
data->temp_max[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP_MAX[i]);
data->temp_min[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP_MIN[i]);
}
for (i = 1; i < 3; i++)
data->temp_offset[i] = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_TEMP_OFFSET(i));
/* first offset is temp_offset[0] if SFR bit 4 is set,
temp_offset[1] otherwise */
if (sfr & 0x10) {
data->temp_offset[0] = data->temp_offset[1];
data->temp_offset[1] = 0;
} else
data->temp_offset[0] = 0;
data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID)
& 0x0f;
config = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_CONFIG);
if (config & 0x20)
data->vid |= (i2c_smbus_read_byte_data(client,
SMSC47M192_REG_VID4) & 0x01) << 4;
data->alarms = i2c_smbus_read_byte_data(client,
SMSC47M192_REG_ALARM1) |
(i2c_smbus_read_byte_data(client,
SMSC47M192_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static int __init smsc47m192_init(void)
{
return i2c_add_driver(&smsc47m192_driver);
}
static void __exit smsc47m192_exit(void)
{
i2c_del_driver(&smsc47m192_driver);
}
MODULE_AUTHOR("Hartmut Rick <linux@rick.claranet.de>");
MODULE_DESCRIPTION("SMSC47M192 driver");
MODULE_LICENSE("GPL");
module_init(smsc47m192_init);
module_exit(smsc47m192_exit);
