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alistair23-linux/drivers/hwmon/lm80.c
Jean Delvare 8a9947552d [PATCH] i2c: Drop i2c_driver.flags, 2 of 3 
Just about every i2c chip driver sets the I2C_DF_NOTIFY flag, so we
can simply make it the default and drop the flag. If any driver really
doesn't want to be notified when i2c adapters are added, that driver
can simply omit to set .attach_adapter. This approach is also more
robust as it prevents accidental NULL pointer dereferences.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-01-05 22:16:21 -08:00

609 lines
20 KiB
C
Raw Blame History

/*
* lm80.c - From lm_sensors, Linux kernel modules for hardware
* monitoring
* Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
* and Philip Edelbrock <phil@netroedge.com>
*
* Ported to Linux 2.6 by Tiago Sousa <mirage@kaotik.org>
*
* 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/err.h>
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x28, 0x29, 0x2a, 0x2b, 0x2c,
0x2d, 0x2e, 0x2f, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_1(lm80);
/* Many LM80 constants specified below */
/* The LM80 registers */
#define LM80_REG_IN_MAX(nr) (0x2a + (nr) * 2)
#define LM80_REG_IN_MIN(nr) (0x2b + (nr) * 2)
#define LM80_REG_IN(nr) (0x20 + (nr))
#define LM80_REG_FAN1 0x28
#define LM80_REG_FAN2 0x29
#define LM80_REG_FAN_MIN(nr) (0x3b + (nr))
#define LM80_REG_TEMP 0x27
#define LM80_REG_TEMP_HOT_MAX 0x38
#define LM80_REG_TEMP_HOT_HYST 0x39
#define LM80_REG_TEMP_OS_MAX 0x3a
#define LM80_REG_TEMP_OS_HYST 0x3b
#define LM80_REG_CONFIG 0x00
#define LM80_REG_ALARM1 0x01
#define LM80_REG_ALARM2 0x02
#define LM80_REG_MASK1 0x03
#define LM80_REG_MASK2 0x04
#define LM80_REG_FANDIV 0x05
#define LM80_REG_RES 0x06
/* Conversions. Rounding and limit checking is only done on the TO_REG
variants. Note that you should be a bit careful with which arguments
these macros are called: arguments may be evaluated more than once.
Fixing this is just not worth it. */
#define IN_TO_REG(val) (SENSORS_LIMIT(((val)+5)/10,0,255))
#define IN_FROM_REG(val) ((val)*10)
static inline unsigned char FAN_TO_REG(unsigned rpm, unsigned div)
{
if (rpm == 0)
return 255;
rpm = SENSORS_LIMIT(rpm, 1, 1000000);
return SENSORS_LIMIT((1350000 + rpm*div / 2) / (rpm*div), 1, 254);
}
#define FAN_FROM_REG(val,div) ((val)==0?-1:\
(val)==255?0:1350000/((div)*(val)))
static inline long TEMP_FROM_REG(u16 temp)
{
long res;
temp >>= 4;
if (temp < 0x0800)
res = 625 * (long) temp;
else
res = ((long) temp - 0x01000) * 625;
return res / 10;
}
#define TEMP_LIMIT_FROM_REG(val) (((val)>0x80?(val)-0x100:(val))*1000)
#define TEMP_LIMIT_TO_REG(val) SENSORS_LIMIT((val)<0?\
((val)-500)/1000:((val)+500)/1000,0,255)
#define DIV_FROM_REG(val) (1 << (val))
/*
* Client data (each client gets its own)
*/
struct lm80_data {
struct i2c_client client;
struct class_device *class_dev;
struct semaphore update_lock;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
u8 in[7]; /* Register value */
u8 in_max[7]; /* Register value */
u8 in_min[7]; /* Register value */
u8 fan[2]; /* Register value */
u8 fan_min[2]; /* Register value */
u8 fan_div[2]; /* Register encoding, shifted right */
u16 temp; /* Register values, shifted right */
u8 temp_hot_max; /* Register value */
u8 temp_hot_hyst; /* Register value */
u8 temp_os_max; /* Register value */
u8 temp_os_hyst; /* Register value */
u16 alarms; /* Register encoding, combined */
};
/*
* Functions declaration
*/
static int lm80_attach_adapter(struct i2c_adapter *adapter);
static int lm80_detect(struct i2c_adapter *adapter, int address, int kind);
static void lm80_init_client(struct i2c_client *client);
static int lm80_detach_client(struct i2c_client *client);
static struct lm80_data *lm80_update_device(struct device *dev);
static int lm80_read_value(struct i2c_client *client, u8 reg);
static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value);
/*
* Driver data (common to all clients)
*/
static struct i2c_driver lm80_driver = {
.owner = THIS_MODULE,
.name = "lm80",
.id = I2C_DRIVERID_LM80,
.attach_adapter = lm80_attach_adapter,
.detach_client = lm80_detach_client,
};
/*
* Sysfs stuff
*/
#define show_in(suffix, value) \
static ssize_t show_in_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm80_data *data = lm80_update_device(dev); \
return sprintf(buf, "%d\n", IN_FROM_REG(data->value)); \
}
show_in(min0, in_min[0]);
show_in(min1, in_min[1]);
show_in(min2, in_min[2]);
show_in(min3, in_min[3]);
show_in(min4, in_min[4]);
show_in(min5, in_min[5]);
show_in(min6, in_min[6]);
show_in(max0, in_max[0]);
show_in(max1, in_max[1]);
show_in(max2, in_max[2]);
show_in(max3, in_max[3]);
show_in(max4, in_max[4]);
show_in(max5, in_max[5]);
show_in(max6, in_max[6]);
show_in(input0, in[0]);
show_in(input1, in[1]);
show_in(input2, in[2]);
show_in(input3, in[3]);
show_in(input4, in[4]);
show_in(input5, in[5]);
show_in(input6, in[6]);
#define set_in(suffix, value, reg) \
static ssize_t set_in_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm80_data *data = i2c_get_clientdata(client); \
long val = simple_strtol(buf, NULL, 10); \
\
down(&data->update_lock);\
data->value = IN_TO_REG(val); \
lm80_write_value(client, reg, data->value); \
up(&data->update_lock);\
return count; \
}
set_in(min0, in_min[0], LM80_REG_IN_MIN(0));
set_in(min1, in_min[1], LM80_REG_IN_MIN(1));
set_in(min2, in_min[2], LM80_REG_IN_MIN(2));
set_in(min3, in_min[3], LM80_REG_IN_MIN(3));
set_in(min4, in_min[4], LM80_REG_IN_MIN(4));
set_in(min5, in_min[5], LM80_REG_IN_MIN(5));
set_in(min6, in_min[6], LM80_REG_IN_MIN(6));
set_in(max0, in_max[0], LM80_REG_IN_MAX(0));
set_in(max1, in_max[1], LM80_REG_IN_MAX(1));
set_in(max2, in_max[2], LM80_REG_IN_MAX(2));
set_in(max3, in_max[3], LM80_REG_IN_MAX(3));
set_in(max4, in_max[4], LM80_REG_IN_MAX(4));
set_in(max5, in_max[5], LM80_REG_IN_MAX(5));
set_in(max6, in_max[6], LM80_REG_IN_MAX(6));
#define show_fan(suffix, value, div) \
static ssize_t show_fan_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm80_data *data = lm80_update_device(dev); \
return sprintf(buf, "%d\n", FAN_FROM_REG(data->value, \
DIV_FROM_REG(data->div))); \
}
show_fan(min1, fan_min[0], fan_div[0]);
show_fan(min2, fan_min[1], fan_div[1]);
show_fan(input1, fan[0], fan_div[0]);
show_fan(input2, fan[1], fan_div[1]);
#define show_fan_div(suffix, value) \
static ssize_t show_fan_div##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm80_data *data = lm80_update_device(dev); \
return sprintf(buf, "%d\n", DIV_FROM_REG(data->value)); \
}
show_fan_div(1, fan_div[0]);
show_fan_div(2, fan_div[1]);
#define set_fan(suffix, value, reg, div) \
static ssize_t set_fan_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm80_data *data = i2c_get_clientdata(client); \
long val = simple_strtoul(buf, NULL, 10); \
\
down(&data->update_lock);\
data->value = FAN_TO_REG(val, DIV_FROM_REG(data->div)); \
lm80_write_value(client, reg, data->value); \
up(&data->update_lock);\
return count; \
}
set_fan(min1, fan_min[0], LM80_REG_FAN_MIN(1), fan_div[0]);
set_fan(min2, fan_min[1], LM80_REG_FAN_MIN(2), fan_div[1]);
/* Note: we save and restore the fan minimum here, because its value is
determined in part by the fan divisor. This follows the principle of
least suprise; the user doesn't expect the fan minimum to change just
because the divisor changed. */
static ssize_t set_fan_div(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm80_data *data = i2c_get_clientdata(client);
unsigned long min, val = simple_strtoul(buf, NULL, 10);
u8 reg;
/* Save fan_min */
down(&data->update_lock);
min = FAN_FROM_REG(data->fan_min[nr],
DIV_FROM_REG(data->fan_div[nr]));
switch (val) {
case 1: data->fan_div[nr] = 0; break;
case 2: data->fan_div[nr] = 1; break;
case 4: data->fan_div[nr] = 2; break;
case 8: data->fan_div[nr] = 3; break;
default:
dev_err(&client->dev, "fan_div value %ld not "
"supported. Choose one of 1, 2, 4 or 8!\n", val);
up(&data->update_lock);
return -EINVAL;
}
reg = (lm80_read_value(client, LM80_REG_FANDIV) & ~(3 << (2 * (nr + 1))))
| (data->fan_div[nr] << (2 * (nr + 1)));
lm80_write_value(client, LM80_REG_FANDIV, reg);
/* Restore fan_min */
data->fan_min[nr] = FAN_TO_REG(min, DIV_FROM_REG(data->fan_div[nr]));
lm80_write_value(client, LM80_REG_FAN_MIN(nr + 1), data->fan_min[nr]);
up(&data->update_lock);
return count;
}
#define set_fan_div(number) \
static ssize_t set_fan_div##number(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
return set_fan_div(dev, buf, count, number - 1); \
}
set_fan_div(1);
set_fan_div(2);
static ssize_t show_temp_input1(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lm80_data *data = lm80_update_device(dev);
return sprintf(buf, "%ld\n", TEMP_FROM_REG(data->temp));
}
#define show_temp(suffix, value) \
static ssize_t show_temp_##suffix(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct lm80_data *data = lm80_update_device(dev); \
return sprintf(buf, "%d\n", TEMP_LIMIT_FROM_REG(data->value)); \
}
show_temp(hot_max, temp_hot_max);
show_temp(hot_hyst, temp_hot_hyst);
show_temp(os_max, temp_os_max);
show_temp(os_hyst, temp_os_hyst);
#define set_temp(suffix, value, reg) \
static ssize_t set_temp_##suffix(struct device *dev, struct device_attribute *attr, const char *buf, \
size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm80_data *data = i2c_get_clientdata(client); \
long val = simple_strtoul(buf, NULL, 10); \
\
down(&data->update_lock); \
data->value = TEMP_LIMIT_TO_REG(val); \
lm80_write_value(client, reg, data->value); \
up(&data->update_lock); \
return count; \
}
set_temp(hot_max, temp_hot_max, LM80_REG_TEMP_HOT_MAX);
set_temp(hot_hyst, temp_hot_hyst, LM80_REG_TEMP_HOT_HYST);
set_temp(os_max, temp_os_max, LM80_REG_TEMP_OS_MAX);
set_temp(os_hyst, temp_os_hyst, LM80_REG_TEMP_OS_HYST);
static ssize_t show_alarms(struct device *dev, struct device_attribute *attr, char *buf)
{
struct lm80_data *data = lm80_update_device(dev);
return sprintf(buf, "%u\n", data->alarms);
}
static DEVICE_ATTR(in0_min, S_IWUSR | S_IRUGO, show_in_min0, set_in_min0);
static DEVICE_ATTR(in1_min, S_IWUSR | S_IRUGO, show_in_min1, set_in_min1);
static DEVICE_ATTR(in2_min, S_IWUSR | S_IRUGO, show_in_min2, set_in_min2);
static DEVICE_ATTR(in3_min, S_IWUSR | S_IRUGO, show_in_min3, set_in_min3);
static DEVICE_ATTR(in4_min, S_IWUSR | S_IRUGO, show_in_min4, set_in_min4);
static DEVICE_ATTR(in5_min, S_IWUSR | S_IRUGO, show_in_min5, set_in_min5);
static DEVICE_ATTR(in6_min, S_IWUSR | S_IRUGO, show_in_min6, set_in_min6);
static DEVICE_ATTR(in0_max, S_IWUSR | S_IRUGO, show_in_max0, set_in_max0);
static DEVICE_ATTR(in1_max, S_IWUSR | S_IRUGO, show_in_max1, set_in_max1);
static DEVICE_ATTR(in2_max, S_IWUSR | S_IRUGO, show_in_max2, set_in_max2);
static DEVICE_ATTR(in3_max, S_IWUSR | S_IRUGO, show_in_max3, set_in_max3);
static DEVICE_ATTR(in4_max, S_IWUSR | S_IRUGO, show_in_max4, set_in_max4);
static DEVICE_ATTR(in5_max, S_IWUSR | S_IRUGO, show_in_max5, set_in_max5);
static DEVICE_ATTR(in6_max, S_IWUSR | S_IRUGO, show_in_max6, set_in_max6);
static DEVICE_ATTR(in0_input, S_IRUGO, show_in_input0, NULL);
static DEVICE_ATTR(in1_input, S_IRUGO, show_in_input1, NULL);
static DEVICE_ATTR(in2_input, S_IRUGO, show_in_input2, NULL);
static DEVICE_ATTR(in3_input, S_IRUGO, show_in_input3, NULL);
static DEVICE_ATTR(in4_input, S_IRUGO, show_in_input4, NULL);
static DEVICE_ATTR(in5_input, S_IRUGO, show_in_input5, NULL);
static DEVICE_ATTR(in6_input, S_IRUGO, show_in_input6, NULL);
static DEVICE_ATTR(fan1_min, S_IWUSR | S_IRUGO, show_fan_min1,
set_fan_min1);
static DEVICE_ATTR(fan2_min, S_IWUSR | S_IRUGO, show_fan_min2,
set_fan_min2);
static DEVICE_ATTR(fan1_input, S_IRUGO, show_fan_input1, NULL);
static DEVICE_ATTR(fan2_input, S_IRUGO, show_fan_input2, NULL);
static DEVICE_ATTR(fan1_div, S_IWUSR | S_IRUGO, show_fan_div1, set_fan_div1);
static DEVICE_ATTR(fan2_div, S_IWUSR | S_IRUGO, show_fan_div2, set_fan_div2);
static DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input1, NULL);
static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp_hot_max,
set_temp_hot_max);
static DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, show_temp_hot_hyst,
set_temp_hot_hyst);
static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp_os_max,
set_temp_os_max);
static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temp_os_hyst,
set_temp_os_hyst);
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
/*
* Real code
*/
static int lm80_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, lm80_detect);
}
static int lm80_detect(struct i2c_adapter *adapter, int address, int kind)
{
int i, cur;
struct i2c_client *new_client;
struct lm80_data *data;
int err = 0;
const char *name;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
goto exit;
/* OK. For now, we presume we have a valid client. We now create the
client structure, even though we cannot fill it completely yet.
But it allows us to access lm80_{read,write}_value. */
if (!(data = kzalloc(sizeof(struct lm80_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &lm80_driver;
new_client->flags = 0;
/* Now, we do the remaining detection. It is lousy. */
if (lm80_read_value(new_client, LM80_REG_ALARM2) & 0xc0)
goto error_free;
for (i = 0x2a; i <= 0x3d; i++) {
cur = i2c_smbus_read_byte_data(new_client, i);
if ((i2c_smbus_read_byte_data(new_client, i + 0x40) != cur)
|| (i2c_smbus_read_byte_data(new_client, i + 0x80) != cur)
|| (i2c_smbus_read_byte_data(new_client, i + 0xc0) != cur))
goto error_free;
}
/* Determine the chip type - only one kind supported! */
kind = lm80;
name = "lm80";
/* Fill in the remaining client fields and put it into the global list */
strlcpy(new_client->name, name, I2C_NAME_SIZE);
data->valid = 0;
init_MUTEX(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto error_free;
/* Initialize the LM80 chip */
lm80_init_client(new_client);
/* A few vars need to be filled upon startup */
data->fan_min[0] = lm80_read_value(new_client, LM80_REG_FAN_MIN(1));
data->fan_min[1] = lm80_read_value(new_client, LM80_REG_FAN_MIN(2));
/* Register sysfs hooks */
data->class_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->class_dev)) {
err = PTR_ERR(data->class_dev);
goto error_detach;
}
device_create_file(&new_client->dev, &dev_attr_in0_min);
device_create_file(&new_client->dev, &dev_attr_in1_min);
device_create_file(&new_client->dev, &dev_attr_in2_min);
device_create_file(&new_client->dev, &dev_attr_in3_min);
device_create_file(&new_client->dev, &dev_attr_in4_min);
device_create_file(&new_client->dev, &dev_attr_in5_min);
device_create_file(&new_client->dev, &dev_attr_in6_min);
device_create_file(&new_client->dev, &dev_attr_in0_max);
device_create_file(&new_client->dev, &dev_attr_in1_max);
device_create_file(&new_client->dev, &dev_attr_in2_max);
device_create_file(&new_client->dev, &dev_attr_in3_max);
device_create_file(&new_client->dev, &dev_attr_in4_max);
device_create_file(&new_client->dev, &dev_attr_in5_max);
device_create_file(&new_client->dev, &dev_attr_in6_max);
device_create_file(&new_client->dev, &dev_attr_in0_input);
device_create_file(&new_client->dev, &dev_attr_in1_input);
device_create_file(&new_client->dev, &dev_attr_in2_input);
device_create_file(&new_client->dev, &dev_attr_in3_input);
device_create_file(&new_client->dev, &dev_attr_in4_input);
device_create_file(&new_client->dev, &dev_attr_in5_input);
device_create_file(&new_client->dev, &dev_attr_in6_input);
device_create_file(&new_client->dev, &dev_attr_fan1_min);
device_create_file(&new_client->dev, &dev_attr_fan2_min);
device_create_file(&new_client->dev, &dev_attr_fan1_input);
device_create_file(&new_client->dev, &dev_attr_fan2_input);
device_create_file(&new_client->dev, &dev_attr_fan1_div);
device_create_file(&new_client->dev, &dev_attr_fan2_div);
device_create_file(&new_client->dev, &dev_attr_temp1_input);
device_create_file(&new_client->dev, &dev_attr_temp1_max);
device_create_file(&new_client->dev, &dev_attr_temp1_max_hyst);
device_create_file(&new_client->dev, &dev_attr_temp1_crit);
device_create_file(&new_client->dev, &dev_attr_temp1_crit_hyst);
device_create_file(&new_client->dev, &dev_attr_alarms);
return 0;
error_detach:
i2c_detach_client(new_client);
error_free:
kfree(data);
exit:
return err;
}
static int lm80_detach_client(struct i2c_client *client)
{
struct lm80_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->class_dev);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;
}
static int lm80_read_value(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
}
static int lm80_write_value(struct i2c_client *client, u8 reg, u8 value)
{
return i2c_smbus_write_byte_data(client, reg, value);
}
/* Called when we have found a new LM80. */
static void lm80_init_client(struct i2c_client *client)
{
/* Reset all except Watchdog values and last conversion values
This sets fan-divs to 2, among others. This makes most other
initializations unnecessary */
lm80_write_value(client, LM80_REG_CONFIG, 0x80);
/* Set 11-bit temperature resolution */
lm80_write_value(client, LM80_REG_RES, 0x08);
/* Start monitoring */
lm80_write_value(client, LM80_REG_CONFIG, 0x01);
}
static struct lm80_data *lm80_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm80_data *data = i2c_get_clientdata(client);
int i;
down(&data->update_lock);
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
dev_dbg(&client->dev, "Starting lm80 update\n");
for (i = 0; i <= 6; i++) {
data->in[i] =
lm80_read_value(client, LM80_REG_IN(i));
data->in_min[i] =
lm80_read_value(client, LM80_REG_IN_MIN(i));
data->in_max[i] =
lm80_read_value(client, LM80_REG_IN_MAX(i));
}
data->fan[0] = lm80_read_value(client, LM80_REG_FAN1);
data->fan_min[0] =
lm80_read_value(client, LM80_REG_FAN_MIN(1));
data->fan[1] = lm80_read_value(client, LM80_REG_FAN2);
data->fan_min[1] =
lm80_read_value(client, LM80_REG_FAN_MIN(2));
data->temp =
(lm80_read_value(client, LM80_REG_TEMP) << 8) |
(lm80_read_value(client, LM80_REG_RES) & 0xf0);
data->temp_os_max =
lm80_read_value(client, LM80_REG_TEMP_OS_MAX);
data->temp_os_hyst =
lm80_read_value(client, LM80_REG_TEMP_OS_HYST);
data->temp_hot_max =
lm80_read_value(client, LM80_REG_TEMP_HOT_MAX);
data->temp_hot_hyst =
lm80_read_value(client, LM80_REG_TEMP_HOT_HYST);
i = lm80_read_value(client, LM80_REG_FANDIV);
data->fan_div[0] = (i >> 2) & 0x03;
data->fan_div[1] = (i >> 4) & 0x03;
data->alarms = lm80_read_value(client, LM80_REG_ALARM1) +
(lm80_read_value(client, LM80_REG_ALARM2) << 8);
data->last_updated = jiffies;
data->valid = 1;
}
up(&data->update_lock);
return data;
}
static int __init sensors_lm80_init(void)
{
return i2c_add_driver(&lm80_driver);
}
static void __exit sensors_lm80_exit(void)
{
i2c_del_driver(&lm80_driver);
}
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
"Philip Edelbrock <phil@netroedge.com>");
MODULE_DESCRIPTION("LM80 driver");
MODULE_LICENSE("GPL");
module_init(sensors_lm80_init);
module_exit(sensors_lm80_exit);
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