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linux-sg2042/drivers/hwmon/gl520sm.c

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/*
gl520sm.c - Part of lm_sensors, Linux kernel modules for hardware
monitoring
Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>,
Kyösti Mälkki <kmalkki@cc.hut.fi>
Copyright (c) 2005 Maarten Deprez <maartendeprez@users.sourceforge.net>
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-vid.h>
#include <linux/err.h>
#include <linux/mutex.h>
#include <linux/sysfs.h>
/* Type of the extra sensor */
static unsigned short extra_sensor_type;
module_param(extra_sensor_type, ushort, 0);
MODULE_PARM_DESC(extra_sensor_type, "Type of extra sensor (0=autodetect, 1=temperature, 2=voltage)");
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END };
/* Insmod parameters */
I2C_CLIENT_INSMOD_1(gl520sm);
/* Many GL520 constants specified below
One of the inputs can be configured as either temp or voltage.
That's why _TEMP2 and _IN4 access the same register
*/
/* The GL520 registers */
#define GL520_REG_CHIP_ID 0x00
#define GL520_REG_REVISION 0x01
#define GL520_REG_CONF 0x03
#define GL520_REG_MASK 0x11
#define GL520_REG_VID_INPUT 0x02
#define GL520_REG_IN0_INPUT 0x15
#define GL520_REG_IN0_LIMIT 0x0c
#define GL520_REG_IN0_MIN GL520_REG_IN0_LIMIT
#define GL520_REG_IN0_MAX GL520_REG_IN0_LIMIT
#define GL520_REG_IN1_INPUT 0x14
#define GL520_REG_IN1_LIMIT 0x09
#define GL520_REG_IN1_MIN GL520_REG_IN1_LIMIT
#define GL520_REG_IN1_MAX GL520_REG_IN1_LIMIT
#define GL520_REG_IN2_INPUT 0x13
#define GL520_REG_IN2_LIMIT 0x0a
#define GL520_REG_IN2_MIN GL520_REG_IN2_LIMIT
#define GL520_REG_IN2_MAX GL520_REG_IN2_LIMIT
#define GL520_REG_IN3_INPUT 0x0d
#define GL520_REG_IN3_LIMIT 0x0b
#define GL520_REG_IN3_MIN GL520_REG_IN3_LIMIT
#define GL520_REG_IN3_MAX GL520_REG_IN3_LIMIT
#define GL520_REG_IN4_INPUT 0x0e
#define GL520_REG_IN4_MAX 0x17
#define GL520_REG_IN4_MIN 0x18
#define GL520_REG_TEMP1_INPUT 0x04
#define GL520_REG_TEMP1_MAX 0x05
#define GL520_REG_TEMP1_MAX_HYST 0x06
#define GL520_REG_TEMP2_INPUT 0x0e
#define GL520_REG_TEMP2_MAX 0x17
#define GL520_REG_TEMP2_MAX_HYST 0x18
#define GL520_REG_FAN_INPUT 0x07
#define GL520_REG_FAN_MIN 0x08
#define GL520_REG_FAN_DIV 0x0f
#define GL520_REG_FAN_OFF GL520_REG_FAN_DIV
#define GL520_REG_ALARMS 0x12
#define GL520_REG_BEEP_MASK 0x10
#define GL520_REG_BEEP_ENABLE GL520_REG_CONF
/*
* Function declarations
*/
static int gl520_attach_adapter(struct i2c_adapter *adapter);
static int gl520_detect(struct i2c_adapter *adapter, int address, int kind);
static void gl520_init_client(struct i2c_client *client);
static int gl520_detach_client(struct i2c_client *client);
static int gl520_read_value(struct i2c_client *client, u8 reg);
static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value);
static struct gl520_data *gl520_update_device(struct device *dev);
/* Driver data */
static struct i2c_driver gl520_driver = {
.driver = {
.name = "gl520sm",
},
.id = I2C_DRIVERID_GL520,
.attach_adapter = gl520_attach_adapter,
.detach_client = gl520_detach_client,
};
/* Client data */
struct gl520_data {
struct i2c_client client;
struct class_device *class_dev;
struct mutex update_lock;
char valid; /* zero until the following fields are valid */
unsigned long last_updated; /* in jiffies */
u8 vid;
u8 vrm;
u8 in_input[5]; /* [0] = VVD */
u8 in_min[5]; /* [0] = VDD */
u8 in_max[5]; /* [0] = VDD */
u8 fan_input[2];
u8 fan_min[2];
u8 fan_div[2];
u8 fan_off;
u8 temp_input[2];
u8 temp_max[2];
u8 temp_max_hyst[2];
u8 alarms;
u8 beep_enable;
u8 beep_mask;
u8 alarm_mask;
u8 two_temps;
};
/*
* Sysfs stuff
*/
#define sysfs_r(type, n, item, reg) \
static ssize_t get_##type##item (struct gl520_data *, char *, int); \
static ssize_t get_##type##n##item (struct device *, struct device_attribute *attr, char *); \
static ssize_t get_##type##n##item (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct gl520_data *data = gl520_update_device(dev); \
return get_##type##item(data, buf, (n)); \
}
#define sysfs_w(type, n, item, reg) \
static ssize_t set_##type##item (struct i2c_client *, struct gl520_data *, const char *, size_t, int, int); \
static ssize_t set_##type##n##item (struct device *, struct device_attribute *attr, const char *, size_t); \
static ssize_t set_##type##n##item (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct gl520_data *data = i2c_get_clientdata(client); \
return set_##type##item(client, data, buf, count, (n), reg); \
}
#define sysfs_rw_n(type, n, item, reg) \
sysfs_r(type, n, item, reg) \
sysfs_w(type, n, item, reg) \
static DEVICE_ATTR(type##n##item, S_IRUGO | S_IWUSR, get_##type##n##item, set_##type##n##item);
#define sysfs_ro_n(type, n, item, reg) \
sysfs_r(type, n, item, reg) \
static DEVICE_ATTR(type##n##item, S_IRUGO, get_##type##n##item, NULL);
#define sysfs_rw(type, item, reg) \
sysfs_r(type, 0, item, reg) \
sysfs_w(type, 0, item, reg) \
static DEVICE_ATTR(type##item, S_IRUGO | S_IWUSR, get_##type##0##item, set_##type##0##item);
#define sysfs_ro(type, item, reg) \
sysfs_r(type, 0, item, reg) \
static DEVICE_ATTR(type##item, S_IRUGO, get_##type##0##item, NULL);
#define sysfs_vid(n) \
sysfs_ro_n(cpu, n, _vid, GL520_REG_VID_INPUT)
#define sysfs_in(n) \
sysfs_ro_n(in, n, _input, GL520_REG_IN##n##INPUT) \
sysfs_rw_n(in, n, _min, GL520_REG_IN##n##_MIN) \
sysfs_rw_n(in, n, _max, GL520_REG_IN##n##_MAX) \
#define sysfs_fan(n) \
sysfs_ro_n(fan, n, _input, GL520_REG_FAN_INPUT) \
sysfs_rw_n(fan, n, _min, GL520_REG_FAN_MIN) \
sysfs_rw_n(fan, n, _div, GL520_REG_FAN_DIV)
#define sysfs_fan_off(n) \
sysfs_rw_n(fan, n, _off, GL520_REG_FAN_OFF) \
#define sysfs_temp(n) \
sysfs_ro_n(temp, n, _input, GL520_REG_TEMP##n##_INPUT) \
sysfs_rw_n(temp, n, _max, GL520_REG_TEMP##n##_MAX) \
sysfs_rw_n(temp, n, _max_hyst, GL520_REG_TEMP##n##_MAX_HYST)
#define sysfs_alarms() \
sysfs_ro(alarms, , GL520_REG_ALARMS) \
sysfs_rw(beep_enable, , GL520_REG_BEEP_ENABLE) \
sysfs_rw(beep_mask, , GL520_REG_BEEP_MASK)
sysfs_vid(0)
sysfs_in(0)
sysfs_in(1)
sysfs_in(2)
sysfs_in(3)
sysfs_in(4)
sysfs_fan(1)
sysfs_fan(2)
sysfs_fan_off(1)
sysfs_temp(1)
sysfs_temp(2)
sysfs_alarms()
static ssize_t get_cpu_vid(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%u\n", vid_from_reg(data->vid, data->vrm));
}
#define VDD_FROM_REG(val) (((val)*95+2)/4)
#define VDD_TO_REG(val) (SENSORS_LIMIT((((val)*4+47)/95),0,255))
#define IN_FROM_REG(val) ((val)*19)
#define IN_TO_REG(val) (SENSORS_LIMIT((((val)+9)/19),0,255))
static ssize_t get_in_input(struct gl520_data *data, char *buf, int n)
{
u8 r = data->in_input[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t get_in_min(struct gl520_data *data, char *buf, int n)
{
u8 r = data->in_min[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t get_in_max(struct gl520_data *data, char *buf, int n)
{
u8 r = data->in_max[n];
if (n == 0)
return sprintf(buf, "%d\n", VDD_FROM_REG(r));
else
return sprintf(buf, "%d\n", IN_FROM_REG(r));
}
static ssize_t set_in_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
long v = simple_strtol(buf, NULL, 10);
u8 r;
mutex_lock(&data->update_lock);
if (n == 0)
r = VDD_TO_REG(v);
else
r = IN_TO_REG(v);
data->in_min[n] = r;
if (n < 4)
gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
else
gl520_write_value(client, reg, r);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_in_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
long v = simple_strtol(buf, NULL, 10);
u8 r;
if (n == 0)
r = VDD_TO_REG(v);
else
r = IN_TO_REG(v);
mutex_lock(&data->update_lock);
data->in_max[n] = r;
if (n < 4)
gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
else
gl520_write_value(client, reg, r);
mutex_unlock(&data->update_lock);
return count;
}
#define DIV_FROM_REG(val) (1 << (val))
#define FAN_FROM_REG(val,div) ((val)==0 ? 0 : (480000/((val) << (div))))
#define FAN_TO_REG(val,div) ((val)<=0?0:SENSORS_LIMIT((480000 + ((val) << ((div)-1))) / ((val) << (div)), 1, 255));
static ssize_t get_fan_input(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_input[n - 1], data->fan_div[n - 1]));
}
static ssize_t get_fan_min(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", FAN_FROM_REG(data->fan_min[n - 1], data->fan_div[n - 1]));
}
static ssize_t get_fan_div(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", DIV_FROM_REG(data->fan_div[n - 1]));
}
static ssize_t get_fan_off(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", data->fan_off);
}
static ssize_t set_fan_min(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
unsigned long v = simple_strtoul(buf, NULL, 10);
u8 r;
mutex_lock(&data->update_lock);
r = FAN_TO_REG(v, data->fan_div[n - 1]);
data->fan_min[n - 1] = r;
if (n == 1)
gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff00) | (r << 8));
else
gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xff) | r);
data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
if (data->fan_min[n - 1] == 0)
data->alarm_mask &= (n == 1) ? ~0x20 : ~0x40;
else
data->alarm_mask |= (n == 1) ? 0x20 : 0x40;
data->beep_mask &= data->alarm_mask;
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_fan_div(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
unsigned long v = simple_strtoul(buf, NULL, 10);
u8 r;
switch (v) {
case 1: r = 0; break;
case 2: r = 1; break;
case 4: r = 2; break;
case 8: r = 3; break;
default:
dev_err(&client->dev, "fan_div value %ld not supported. Choose one of 1, 2, 4 or 8!\n", v);
return -EINVAL;
}
mutex_lock(&data->update_lock);
data->fan_div[n - 1] = r;
if (n == 1)
gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0xc0) | (r << 6));
else
gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x30) | (r << 4));
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_fan_off(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
u8 r = simple_strtoul(buf, NULL, 10)?1:0;
mutex_lock(&data->update_lock);
data->fan_off = r;
gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x0c) | (r << 2));
mutex_unlock(&data->update_lock);
return count;
}
#define TEMP_FROM_REG(val) (((val) - 130) * 1000)
#define TEMP_TO_REG(val) (SENSORS_LIMIT(((((val)<0?(val)-500:(val)+500) / 1000)+130),0,255))
static ssize_t get_temp_input(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_input[n - 1]));
}
static ssize_t get_temp_max(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[n - 1]));
}
static ssize_t get_temp_max_hyst(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max_hyst[n - 1]));
}
static ssize_t set_temp_max(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
long v = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_max[n - 1] = TEMP_TO_REG(v);
gl520_write_value(client, reg, data->temp_max[n - 1]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp_max_hyst(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
long v = simple_strtol(buf, NULL, 10);
mutex_lock(&data->update_lock);
data->temp_max_hyst[n - 1] = TEMP_TO_REG(v);
gl520_write_value(client, reg, data->temp_max_hyst[n - 1]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t get_alarms(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", data->alarms);
}
static ssize_t get_beep_enable(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", data->beep_enable);
}
static ssize_t get_beep_mask(struct gl520_data *data, char *buf, int n)
{
return sprintf(buf, "%d\n", data->beep_mask);
}
static ssize_t set_beep_enable(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
u8 r = simple_strtoul(buf, NULL, 10)?0:1;
mutex_lock(&data->update_lock);
data->beep_enable = !r;
gl520_write_value(client, reg, (gl520_read_value(client, reg) & ~0x04) | (r << 2));
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_beep_mask(struct i2c_client *client, struct gl520_data *data, const char *buf, size_t count, int n, int reg)
{
u8 r = simple_strtoul(buf, NULL, 10);
mutex_lock(&data->update_lock);
r &= data->alarm_mask;
data->beep_mask = r;
gl520_write_value(client, reg, r);
mutex_unlock(&data->update_lock);
return count;
}
static struct attribute *gl520_attributes[] = {
&dev_attr_cpu0_vid.attr,
&dev_attr_in0_input.attr,
&dev_attr_in0_min.attr,
&dev_attr_in0_max.attr,
&dev_attr_in1_input.attr,
&dev_attr_in1_min.attr,
&dev_attr_in1_max.attr,
&dev_attr_in2_input.attr,
&dev_attr_in2_min.attr,
&dev_attr_in2_max.attr,
&dev_attr_in3_input.attr,
&dev_attr_in3_min.attr,
&dev_attr_in3_max.attr,
&dev_attr_fan1_input.attr,
&dev_attr_fan1_min.attr,
&dev_attr_fan1_div.attr,
&dev_attr_fan1_off.attr,
&dev_attr_fan2_input.attr,
&dev_attr_fan2_min.attr,
&dev_attr_fan2_div.attr,
&dev_attr_temp1_input.attr,
&dev_attr_temp1_max.attr,
&dev_attr_temp1_max_hyst.attr,
&dev_attr_alarms.attr,
&dev_attr_beep_enable.attr,
&dev_attr_beep_mask.attr,
NULL
};
static const struct attribute_group gl520_group = {
.attrs = gl520_attributes,
};
static struct attribute *gl520_attributes_opt[] = {
&dev_attr_in4_input.attr,
&dev_attr_in4_min.attr,
&dev_attr_in4_max.attr,
&dev_attr_temp2_input.attr,
&dev_attr_temp2_max.attr,
&dev_attr_temp2_max_hyst.attr,
NULL
};
static const struct attribute_group gl520_group_opt = {
.attrs = gl520_attributes_opt,
};
/*
* Real code
*/
static int gl520_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
return 0;
return i2c_probe(adapter, &addr_data, gl520_detect);
}
static int gl520_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *new_client;
struct gl520_data *data;
int err = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_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 gl520_{read,write}_value. */
if (!(data = kzalloc(sizeof(struct gl520_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 = &gl520_driver;
new_client->flags = 0;
/* Determine the chip type. */
if (kind < 0) {
if ((gl520_read_value(new_client, GL520_REG_CHIP_ID) != 0x20) ||
((gl520_read_value(new_client, GL520_REG_REVISION) & 0x7f) != 0x00) ||
((gl520_read_value(new_client, GL520_REG_CONF) & 0x80) != 0x00)) {
dev_dbg(&new_client->dev, "Unknown chip type, skipping\n");
goto exit_free;
}
}
/* Fill in the remaining client fields */
strlcpy(new_client->name, "gl520sm", I2C_NAME_SIZE);
data->valid = 0;
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
goto exit_free;
/* Initialize the GL520SM chip */
gl520_init_client(new_client);
/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &gl520_group)))
goto exit_detach;
if (data->two_temps) {
if ((err = device_create_file(&new_client->dev,
&dev_attr_temp2_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_temp2_max))
|| (err = device_create_file(&new_client->dev,
&dev_attr_temp2_max_hyst)))
goto exit_remove_files;
} else {
if ((err = device_create_file(&new_client->dev,
&dev_attr_in4_input))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in4_min))
|| (err = device_create_file(&new_client->dev,
&dev_attr_in4_max)))
goto exit_remove_files;
}
data->class_dev = hwmon_device_register(&new_client->dev);
if (IS_ERR(data->class_dev)) {
err = PTR_ERR(data->class_dev);
goto exit_remove_files;
}
return 0;
exit_remove_files:
sysfs_remove_group(&new_client->dev.kobj, &gl520_group);
sysfs_remove_group(&new_client->dev.kobj, &gl520_group_opt);
exit_detach:
i2c_detach_client(new_client);
exit_free:
kfree(data);
exit:
return err;
}
/* Called when we have found a new GL520SM. */
static void gl520_init_client(struct i2c_client *client)
{
struct gl520_data *data = i2c_get_clientdata(client);
u8 oldconf, conf;
conf = oldconf = gl520_read_value(client, GL520_REG_CONF);
data->alarm_mask = 0xff;
data->vrm = vid_which_vrm();
if (extra_sensor_type == 1)
conf &= ~0x10;
else if (extra_sensor_type == 2)
conf |= 0x10;
data->two_temps = !(conf & 0x10);
/* If IRQ# is disabled, we can safely force comparator mode */
if (!(conf & 0x20))
conf &= 0xf7;
/* Enable monitoring if needed */
conf |= 0x40;
if (conf != oldconf)
gl520_write_value(client, GL520_REG_CONF, conf);
gl520_update_device(&(client->dev));
if (data->fan_min[0] == 0)
data->alarm_mask &= ~0x20;
if (data->fan_min[1] == 0)
data->alarm_mask &= ~0x40;
data->beep_mask &= data->alarm_mask;
gl520_write_value(client, GL520_REG_BEEP_MASK, data->beep_mask);
}
static int gl520_detach_client(struct i2c_client *client)
{
struct gl520_data *data = i2c_get_clientdata(client);
int err;
hwmon_device_unregister(data->class_dev);
sysfs_remove_group(&client->dev.kobj, &gl520_group);
sysfs_remove_group(&client->dev.kobj, &gl520_group_opt);
if ((err = i2c_detach_client(client)))
return err;
kfree(data);
return 0;
}
/* Registers 0x07 to 0x0c are word-sized, others are byte-sized
GL520 uses a high-byte first convention */
static int gl520_read_value(struct i2c_client *client, u8 reg)
{
if ((reg >= 0x07) && (reg <= 0x0c))
return swab16(i2c_smbus_read_word_data(client, reg));
else
return i2c_smbus_read_byte_data(client, reg);
}
static int gl520_write_value(struct i2c_client *client, u8 reg, u16 value)
{
if ((reg >= 0x07) && (reg <= 0x0c))
return i2c_smbus_write_word_data(client, reg, swab16(value));
else
return i2c_smbus_write_byte_data(client, reg, value);
}
static struct gl520_data *gl520_update_device(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct gl520_data *data = i2c_get_clientdata(client);
int val;
mutex_lock(&data->update_lock);
if (time_after(jiffies, data->last_updated + 2 * HZ) || !data->valid) {
dev_dbg(&client->dev, "Starting gl520sm update\n");
data->alarms = gl520_read_value(client, GL520_REG_ALARMS);
data->beep_mask = gl520_read_value(client, GL520_REG_BEEP_MASK);
data->vid = gl520_read_value(client, GL520_REG_VID_INPUT) & 0x1f;
val = gl520_read_value(client, GL520_REG_IN0_LIMIT);
data->in_min[0] = val & 0xff;
data->in_max[0] = (val >> 8) & 0xff;
val = gl520_read_value(client, GL520_REG_IN1_LIMIT);
data->in_min[1] = val & 0xff;
data->in_max[1] = (val >> 8) & 0xff;
val = gl520_read_value(client, GL520_REG_IN2_LIMIT);
data->in_min[2] = val & 0xff;
data->in_max[2] = (val >> 8) & 0xff;
val = gl520_read_value(client, GL520_REG_IN3_LIMIT);
data->in_min[3] = val & 0xff;
data->in_max[3] = (val >> 8) & 0xff;
val = gl520_read_value(client, GL520_REG_FAN_INPUT);
data->fan_input[0] = (val >> 8) & 0xff;
data->fan_input[1] = val & 0xff;
val = gl520_read_value(client, GL520_REG_FAN_MIN);
data->fan_min[0] = (val >> 8) & 0xff;
data->fan_min[1] = val & 0xff;
data->temp_input[0] = gl520_read_value(client, GL520_REG_TEMP1_INPUT);
data->temp_max[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX);
data->temp_max_hyst[0] = gl520_read_value(client, GL520_REG_TEMP1_MAX_HYST);
val = gl520_read_value(client, GL520_REG_FAN_DIV);
data->fan_div[0] = (val >> 6) & 0x03;
data->fan_div[1] = (val >> 4) & 0x03;
data->fan_off = (val >> 2) & 0x01;
data->alarms &= data->alarm_mask;
val = gl520_read_value(client, GL520_REG_CONF);
data->beep_enable = !((val >> 2) & 1);
data->in_input[0] = gl520_read_value(client, GL520_REG_IN0_INPUT);
data->in_input[1] = gl520_read_value(client, GL520_REG_IN1_INPUT);
data->in_input[2] = gl520_read_value(client, GL520_REG_IN2_INPUT);
data->in_input[3] = gl520_read_value(client, GL520_REG_IN3_INPUT);
/* Temp1 and Vin4 are the same input */
if (data->two_temps) {
data->temp_input[1] = gl520_read_value(client, GL520_REG_TEMP2_INPUT);
data->temp_max[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX);
data->temp_max_hyst[1] = gl520_read_value(client, GL520_REG_TEMP2_MAX_HYST);
} else {
data->in_input[4] = gl520_read_value(client, GL520_REG_IN4_INPUT);
data->in_min[4] = gl520_read_value(client, GL520_REG_IN4_MIN);
data->in_max[4] = gl520_read_value(client, GL520_REG_IN4_MAX);
}
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
static int __init sensors_gl520sm_init(void)
{
return i2c_add_driver(&gl520_driver);
}
static void __exit sensors_gl520sm_exit(void)
{
i2c_del_driver(&gl520_driver);
}
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>, "
"Kyösti Mälkki <kmalkki@cc.hut.fi>, "
"Maarten Deprez <maartendeprez@users.sourceforge.net>");
MODULE_DESCRIPTION("GL520SM driver");
MODULE_LICENSE("GPL");
module_init(sensors_gl520sm_init);
module_exit(sensors_gl520sm_exit);
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