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Commit 1c28d80f authored by Justin Thiessen's avatar Justin Thiessen Committed by Greg Kroah-Hartman
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[PATCH] I2C: lm85.c driver update 

Signed off by: Justin Thiessen <jthiessen@penguincomputing.com
Signed-off-by: default avatarGreg Kroah-Hartman <greg@kroah.com>
parent 6d214b08
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Showing with 388 additions and 29 deletions
drivers/i2c/chips/lm85.c
View file @ 1c28d80f
......@@ -4,6 +4,7 @@
Copyright (c) 1998, 1999 Frodo Looijaard <frodol@dds.nl>
Copyright (c) 2002, 2003 Philip Pokorny <ppokorny@penguincomputing.com>
Copyright (c) 2003 Margit Schubert-While <margitsw@t-online.de>
Copyright (c) 2004 Justin Thiessen <jthiessen@penguincomputing.com>
Chip details at <http://www.national.com/ds/LM/LM85.pdf>
......@@ -29,11 +30,6 @@
#include <linux/i2c.h>
#include <linux/i2c-sensor.h>
#include <linux/i2c-vid.h>
/*
#include <asm/io.h>
*/
#undef LM85EXTENDEDFUNC /* Extended functionality */
/* Addresses to scan */
static unsigned short normal_i2c[] = { 0x2c, 0x2d, 0x2e, I2C_CLIENT_END };
......@@ -163,8 +159,6 @@ static int lm85_scaling[] = { /* .001 Volts */
#define EXT_FROM_REG(val,sensor) (((val)>>(sensor * 2))&0x03)
#ifdef LM85EXTENDEDFUNC /* Extended functionality */
/* ZONEs have the following parameters:
* Limit (low) temp, 1. degC
* Hysteresis (below limit), 1. degC (0-15)
......@@ -183,20 +177,32 @@ static int lm85_scaling[] = { /* .001 Volts */
* Filter constant (or disabled) .1 seconds
*/
/* These are the zone temperature range encodings */
static int lm85_range_map[] = { /* .1 degC */
20, 25, 33, 40, 50, 66,
80, 100, 133, 160, 200, 266,
320, 400, 533, 800
/* These are the zone temperature range encodings in .001 degree C */
static int lm85_range_map[] = {
2000, 2500, 3300, 4000, 5000, 6600,
8000, 10000, 13300, 16000, 20000, 26600,
32000, 40000, 53300, 80000
};
static int RANGE_TO_REG( int range )
{
int i;
if( range >= lm85_range_map[15] ) { return 15 ; }
for( i = 0 ; i < 15 ; ++i )
if( range <= lm85_range_map[i] )
break ;
if ( range < lm85_range_map[0] ) {
return 0 ;
} else if ( range > lm85_range_map[15] ) {
return 15 ;
} else { /* find closest match */
for ( i = 14 ; i >= 0 ; --i ) {
if ( range > lm85_range_map[i] ) { /* range bracketed */
if ((lm85_range_map[i+1] - range) <
(range - lm85_range_map[i])) {
i++;
break;
}
break;
}
}
}
return( i & 0x0f );
}
#define RANGE_FROM_REG(val) (lm85_range_map[(val)&0x0f])
......@@ -240,7 +246,7 @@ static int SPINUP_TO_REG( int spinup )
/* These are the PWM frequency encodings */
static int lm85_freq_map[] = { /* .1 Hz */
100, 150, 230, 300, 380, 470, 620, 980
100, 150, 230, 300, 380, 470, 620, 940
};
static int FREQ_TO_REG( int freq )
{
......@@ -266,13 +272,9 @@ static int FREQ_TO_REG( int freq )
* -2 -- PWM responds to manual control
*/
#endif /* Extended functionality */
static int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
#define ZONE_FROM_REG(val) (lm85_zone_map[((val)>>5)&0x07])
#ifdef LM85EXTENDEDFUNC /* Extended functionality */
static int ZONE_TO_REG( int zone )
{
int i;
......@@ -285,10 +287,8 @@ static int ZONE_TO_REG( int zone )
return( (i & 0x07)<<5 );
}
#endif /* Extended functionality */
#define HYST_TO_REG(val) (SENSORS_LIMIT((-(val)+5)/10,0,15))
#define HYST_FROM_REG(val) (-(val)*10)
#define HYST_TO_REG(val) (SENSORS_LIMIT(((val)+500)/1000,0,15))
#define HYST_FROM_REG(val) ((val)*1000)
#define OFFSET_TO_REG(val) (SENSORS_LIMIT((val)/25,-127,127))
#define OFFSET_FROM_REG(val) ((val)*25)
......@@ -338,6 +338,14 @@ struct lm85_zone {
u8 hyst; /* Low limit hysteresis. (0-15) */
u8 range; /* Temp range, encoded */
s8 critical; /* "All fans ON" temp limit */
u8 off_desired; /* Actual "off" temperature specified. Preserved
* to prevent "drift" as other autofan control
* values change.
*/
u8 max_desired; /* Actual "max" temperature specified. Preserved
* to prevent "drift" as other autofan control
* values change.
*/
};
struct lm85_autofan {
......@@ -448,7 +456,8 @@ static ssize_t set_fan_##offset##_min (struct device *dev, \
{ \
return set_fan_min(dev, buf, count, offset - 1); \
} \
static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, NULL);\
static DEVICE_ATTR(fan##offset##_input, S_IRUGO, show_fan_##offset, \
NULL); \
static DEVICE_ATTR(fan##offset##_min, S_IRUGO | S_IWUSR, \
show_fan_##offset##_min, set_fan_##offset##_min);
......@@ -615,7 +624,8 @@ static ssize_t set_in_##offset##_max (struct device *dev, \
{ \
return set_in_max(dev, buf, count, offset); \
} \
static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in_##offset, NULL); \
static DEVICE_ATTR(in##offset##_input, S_IRUGO, show_in_##offset, \
NULL); \
static DEVICE_ATTR(in##offset##_min, S_IRUGO | S_IWUSR, \
show_in_##offset##_min, set_in_##offset##_min); \
static DEVICE_ATTR(in##offset##_max, S_IRUGO | S_IWUSR, \
......@@ -695,7 +705,8 @@ static ssize_t set_temp_##offset##_max (struct device *dev, \
{ \
return set_temp_max(dev, buf, count, offset - 1); \
} \
static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, NULL); \
static DEVICE_ATTR(temp##offset##_input, S_IRUGO, show_temp_##offset, \
NULL); \
static DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
show_temp_##offset##_min, set_temp_##offset##_min); \
static DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
......@@ -706,6 +717,330 @@ show_temp_reg(2);
show_temp_reg(3);
/* Automatic PWM control */
static ssize_t show_pwm_auto_channels(struct device *dev, char *buf, int nr)
{
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf,"%d\n", ZONE_FROM_REG(data->autofan[nr].config));
}
static ssize_t set_pwm_auto_channels(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm85_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
data->autofan[nr].config = (data->autofan[nr].config & (~0xe0))
| ZONE_TO_REG(val) ;
lm85_write_value(client, LM85_REG_AFAN_CONFIG(nr),
data->autofan[nr].config);
up(&data->update_lock);
return count;
}
static ssize_t show_pwm_auto_pwm_min(struct device *dev, char *buf, int nr)
{
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf,"%d\n", PWM_FROM_REG(data->autofan[nr].min_pwm));
}
static ssize_t set_pwm_auto_pwm_min(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm85_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
data->autofan[nr].min_pwm = PWM_TO_REG(val);
lm85_write_value(client, LM85_REG_AFAN_MINPWM(nr),
data->autofan[nr].min_pwm);
up(&data->update_lock);
return count;
}
static ssize_t show_pwm_auto_pwm_minctl(struct device *dev, char *buf, int nr)
{
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf,"%d\n", data->autofan[nr].min_off);
}
static ssize_t set_pwm_auto_pwm_minctl(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm85_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
data->autofan[nr].min_off = val;
lm85_write_value(client, LM85_REG_AFAN_SPIKE1, data->smooth[0]
| data->syncpwm3
| (data->autofan[0].min_off ? 0x20 : 0)
| (data->autofan[1].min_off ? 0x40 : 0)
| (data->autofan[2].min_off ? 0x80 : 0)
);
up(&data->update_lock);
return count;
}
static ssize_t show_pwm_auto_pwm_freq(struct device *dev, char *buf, int nr)
{
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf,"%d\n", FREQ_FROM_REG(data->autofan[nr].freq));
}
static ssize_t set_pwm_auto_pwm_freq(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm85_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
data->autofan[nr].freq = FREQ_TO_REG(val);
lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
(data->zone[nr].range << 4)
| data->autofan[nr].freq
);
up(&data->update_lock);
return count;
}
#define pwm_auto(offset) \
static ssize_t show_pwm##offset##_auto_channels (struct device *dev, \
char *buf) \
{ \
return show_pwm_auto_channels(dev, buf, offset - 1); \
} \
static ssize_t set_pwm##offset##_auto_channels (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_pwm_auto_channels(dev, buf, count, offset - 1); \
} \
static ssize_t show_pwm##offset##_auto_pwm_min (struct device *dev, \
char *buf) \
{ \
return show_pwm_auto_pwm_min(dev, buf, offset - 1); \
} \
static ssize_t set_pwm##offset##_auto_pwm_min (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_pwm_auto_pwm_min(dev, buf, count, offset - 1); \
} \
static ssize_t show_pwm##offset##_auto_pwm_minctl (struct device *dev, \
char *buf) \
{ \
return show_pwm_auto_pwm_minctl(dev, buf, offset - 1); \
} \
static ssize_t set_pwm##offset##_auto_pwm_minctl (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_pwm_auto_pwm_minctl(dev, buf, count, offset - 1); \
} \
static ssize_t show_pwm##offset##_auto_pwm_freq (struct device *dev, \
char *buf) \
{ \
return show_pwm_auto_pwm_freq(dev, buf, offset - 1); \
} \
static ssize_t set_pwm##offset##_auto_pwm_freq(struct device *dev, \
const char *buf, size_t count) \
{ \
return set_pwm_auto_pwm_freq(dev, buf, count, offset - 1); \
} \
static DEVICE_ATTR(pwm##offset##_auto_channels, S_IRUGO | S_IWUSR, \
show_pwm##offset##_auto_channels, \
set_pwm##offset##_auto_channels); \
static DEVICE_ATTR(pwm##offset##_auto_pwm_min, S_IRUGO | S_IWUSR, \
show_pwm##offset##_auto_pwm_min, \
set_pwm##offset##_auto_pwm_min); \
static DEVICE_ATTR(pwm##offset##_auto_pwm_minctl, S_IRUGO | S_IWUSR, \
show_pwm##offset##_auto_pwm_minctl, \
set_pwm##offset##_auto_pwm_minctl); \
static DEVICE_ATTR(pwm##offset##_auto_pwm_freq, S_IRUGO | S_IWUSR, \
show_pwm##offset##_auto_pwm_freq, \
set_pwm##offset##_auto_pwm_freq);
pwm_auto(1);
pwm_auto(2);
pwm_auto(3);
/* Temperature settings for automatic PWM control */
static ssize_t show_temp_auto_temp_off(struct device *dev, char *buf, int nr)
{
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf,"%d\n", TEMP_FROM_REG(data->zone[nr].limit) -
HYST_FROM_REG(data->zone[nr].hyst));
}
static ssize_t set_temp_auto_temp_off(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm85_data *data = i2c_get_clientdata(client);
int min, val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
min = TEMP_FROM_REG(data->zone[nr].limit);
data->zone[nr].off_desired = TEMP_TO_REG(val);
data->zone[nr].hyst = HYST_TO_REG(min - val);
if ( nr == 0 || nr == 1 ) {
lm85_write_value(client, LM85_REG_AFAN_HYST1,
(data->zone[0].hyst << 4)
| data->zone[1].hyst
);
} else {
lm85_write_value(client, LM85_REG_AFAN_HYST2,
(data->zone[2].hyst << 4)
);
}
up(&data->update_lock);
return count;
}
static ssize_t show_temp_auto_temp_min(struct device *dev, char *buf, int nr)
{
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf,"%d\n", TEMP_FROM_REG(data->zone[nr].limit) );
}
static ssize_t set_temp_auto_temp_min(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm85_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
data->zone[nr].limit = TEMP_TO_REG(val);
lm85_write_value(client, LM85_REG_AFAN_LIMIT(nr),
data->zone[nr].limit);
/* Update temp_auto_max and temp_auto_range */
data->zone[nr].range = RANGE_TO_REG(
TEMP_FROM_REG(data->zone[nr].max_desired) -
TEMP_FROM_REG(data->zone[nr].limit));
lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
((data->zone[nr].range & 0x0f) << 4)
| (data->autofan[nr].freq & 0x07));
/* Update temp_auto_hyst and temp_auto_off */
data->zone[nr].hyst = HYST_TO_REG(TEMP_FROM_REG(
data->zone[nr].limit) - TEMP_FROM_REG(
data->zone[nr].off_desired));
if ( nr == 0 || nr == 1 ) {
lm85_write_value(client, LM85_REG_AFAN_HYST1,
(data->zone[0].hyst << 4)
| data->zone[1].hyst
);
} else {
lm85_write_value(client, LM85_REG_AFAN_HYST2,
(data->zone[2].hyst << 4)
);
}
up(&data->update_lock);
return count;
}
static ssize_t show_temp_auto_temp_max(struct device *dev, char *buf, int nr)
{
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf,"%d\n", TEMP_FROM_REG(data->zone[nr].limit) +
RANGE_FROM_REG(data->zone[nr].range));
}
static ssize_t set_temp_auto_temp_max(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm85_data *data = i2c_get_clientdata(client);
int min, val;
down(&data->update_lock);
min = TEMP_FROM_REG(data->zone[nr].limit);
val = simple_strtol(buf, NULL, 10);
data->zone[nr].max_desired = TEMP_TO_REG(val);
data->zone[nr].range = RANGE_TO_REG(
val - min);
lm85_write_value(client, LM85_REG_AFAN_RANGE(nr),
((data->zone[nr].range & 0x0f) << 4)
| (data->autofan[nr].freq & 0x07));
up(&data->update_lock);
return count;
}
static ssize_t show_temp_auto_temp_crit(struct device *dev, char *buf, int nr)
{
struct lm85_data *data = lm85_update_device(dev);
return sprintf(buf,"%d\n", TEMP_FROM_REG(data->zone[nr].critical));
}
static ssize_t set_temp_auto_temp_crit(struct device *dev, const char *buf,
size_t count, int nr)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm85_data *data = i2c_get_clientdata(client);
int val;
down(&data->update_lock);
val = simple_strtol(buf, NULL, 10);
data->zone[nr].critical = TEMP_TO_REG(val);
lm85_write_value(client, LM85_REG_AFAN_CRITICAL(nr),
data->zone[nr].critical);
up(&data->update_lock);
return count;
}
#define temp_auto(offset) \
static ssize_t show_temp##offset##_auto_temp_off (struct device *dev, \
char *buf) \
{ \
return show_temp_auto_temp_off(dev, buf, offset - 1); \
} \
static ssize_t set_temp##offset##_auto_temp_off (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_temp_auto_temp_off(dev, buf, count, offset - 1); \
} \
static ssize_t show_temp##offset##_auto_temp_min (struct device *dev, \
char *buf) \
{ \
return show_temp_auto_temp_min(dev, buf, offset - 1); \
} \
static ssize_t set_temp##offset##_auto_temp_min (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_temp_auto_temp_min(dev, buf, count, offset - 1); \
} \
static ssize_t show_temp##offset##_auto_temp_max (struct device *dev, \
char *buf) \
{ \
return show_temp_auto_temp_max(dev, buf, offset - 1); \
} \
static ssize_t set_temp##offset##_auto_temp_max (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_temp_auto_temp_max(dev, buf, count, offset - 1); \
} \
static ssize_t show_temp##offset##_auto_temp_crit (struct device *dev, \
char *buf) \
{ \
return show_temp_auto_temp_crit(dev, buf, offset - 1); \
} \
static ssize_t set_temp##offset##_auto_temp_crit (struct device *dev, \
const char *buf, size_t count) \
{ \
return set_temp_auto_temp_crit(dev, buf, count, offset - 1); \
} \
static DEVICE_ATTR(temp##offset##_auto_temp_off, S_IRUGO | S_IWUSR, \
show_temp##offset##_auto_temp_off, \
set_temp##offset##_auto_temp_off); \
static DEVICE_ATTR(temp##offset##_auto_temp_min, S_IRUGO | S_IWUSR, \
show_temp##offset##_auto_temp_min, \
set_temp##offset##_auto_temp_min); \
static DEVICE_ATTR(temp##offset##_auto_temp_max, S_IRUGO | S_IWUSR, \
show_temp##offset##_auto_temp_max, \
set_temp##offset##_auto_temp_max); \
static DEVICE_ATTR(temp##offset##_auto_temp_crit, S_IRUGO | S_IWUSR, \
show_temp##offset##_auto_temp_crit, \
set_temp##offset##_auto_temp_crit);
temp_auto(1);
temp_auto(2);
temp_auto(3);
int lm85_attach_adapter(struct i2c_adapter *adapter)
{
if (!(adapter->class & I2C_CLASS_HWMON))
......@@ -879,6 +1214,30 @@ int lm85_detect(struct i2c_adapter *adapter, int address,
device_create_file(&new_client->dev, &dev_attr_vrm);
device_create_file(&new_client->dev, &dev_attr_cpu0_vid);
device_create_file(&new_client->dev, &dev_attr_alarms);
device_create_file(&new_client->dev, &dev_attr_pwm1_auto_channels);
device_create_file(&new_client->dev, &dev_attr_pwm2_auto_channels);
device_create_file(&new_client->dev, &dev_attr_pwm3_auto_channels);
device_create_file(&new_client->dev, &dev_attr_pwm1_auto_pwm_min);
device_create_file(&new_client->dev, &dev_attr_pwm2_auto_pwm_min);
device_create_file(&new_client->dev, &dev_attr_pwm3_auto_pwm_min);
device_create_file(&new_client->dev, &dev_attr_pwm1_auto_pwm_minctl);
device_create_file(&new_client->dev, &dev_attr_pwm2_auto_pwm_minctl);
device_create_file(&new_client->dev, &dev_attr_pwm3_auto_pwm_minctl);
device_create_file(&new_client->dev, &dev_attr_pwm1_auto_pwm_freq);
device_create_file(&new_client->dev, &dev_attr_pwm2_auto_pwm_freq);
device_create_file(&new_client->dev, &dev_attr_pwm3_auto_pwm_freq);
device_create_file(&new_client->dev, &dev_attr_temp1_auto_temp_off);
device_create_file(&new_client->dev, &dev_attr_temp2_auto_temp_off);
device_create_file(&new_client->dev, &dev_attr_temp3_auto_temp_off);
device_create_file(&new_client->dev, &dev_attr_temp1_auto_temp_min);
device_create_file(&new_client->dev, &dev_attr_temp2_auto_temp_min);
device_create_file(&new_client->dev, &dev_attr_temp3_auto_temp_min);
device_create_file(&new_client->dev, &dev_attr_temp1_auto_temp_max);
device_create_file(&new_client->dev, &dev_attr_temp2_auto_temp_max);
device_create_file(&new_client->dev, &dev_attr_temp3_auto_temp_max);
device_create_file(&new_client->dev, &dev_attr_temp1_auto_temp_crit);
device_create_file(&new_client->dev, &dev_attr_temp2_auto_temp_crit);
device_create_file(&new_client->dev, &dev_attr_temp3_auto_temp_crit);
return 0;
......@@ -1162,7 +1521,7 @@ static void __exit sm_lm85_exit(void)
* post 2.7.0 CVS changes.
*/
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, Margit Schubert-While <margitsw@t-online.de>");
MODULE_AUTHOR("Philip Pokorny <ppokorny@penguincomputing.com>, Margit Schubert-While <margitsw@t-online.de>, Justin Thiessen <jthiessen@penguincomputing.com");
MODULE_DESCRIPTION("LM85-B, LM85-C driver");
module_init(sm_lm85_init);
......
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