Skip to content

Commit

Permalink
hwmon: (adm1031) Add sysfs files for temperature offsets
Browse files Browse the repository at this point in the history 
The ADM1030/ADM1031 chips have temperature offset registers, for both the
local and remote temperature sensors. Following the example set forth in
the LM90/ADM1032 driver, expose the offset registers to userspace.

Signed-off-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
  • Loading branch information
Ira Snyder authored and Jean Delvare committed Sep 23, 2009
1 parent 7fa0772 commit 49dc9ef
Showing 1 changed file with 40 additions and 0 deletions.
40 changes: 40 additions & 0 deletions drivers/hwmon/adm1031.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -37,6 +37,7 @@
#define ADM1031_REG_PWM (0x22)
#define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr))

#define ADM1031_REG_TEMP_OFFSET(nr) (0x0d + (nr))
#define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4 * (nr))
#define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4 * (nr))
#define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4 * (nr))
Expand Down Expand Up @@ -93,6 +94,7 @@ struct adm1031_data {
u8 auto_temp_min[3];
u8 auto_temp_off[3];
u8 auto_temp_max[3];
s8 temp_offset[3];
s8 temp_min[3];
s8 temp_max[3];
s8 temp_crit[3];
Expand Down Expand Up @@ -145,6 +147,10 @@ adm1031_write_value(struct i2c_client *client, u8 reg, unsigned int value)

#define TEMP_FROM_REG_EXT(val, ext) (TEMP_FROM_REG(val) + (ext) * 125)

#define TEMP_OFFSET_TO_REG(val) (TEMP_TO_REG(val) & 0x8f)
#define TEMP_OFFSET_FROM_REG(val) TEMP_FROM_REG((val) < 0 ? \
(val) | 0x70 : (val))

#define FAN_FROM_REG(reg, div) ((reg) ? (11250 * 60) / ((reg) * (div)) : 0)

static int FAN_TO_REG(int reg, int div)
Expand Down Expand Up @@ -585,6 +591,14 @@ static ssize_t show_temp(struct device *dev,
(((data->ext_temp[nr] >> ((nr - 1) * 3)) & 7));
return sprintf(buf, "%d\n", TEMP_FROM_REG_EXT(data->temp[nr], ext));
}
static ssize_t show_temp_offset(struct device *dev,
struct device_attribute *attr, char *buf)
{
int nr = to_sensor_dev_attr(attr)->index;
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n",
TEMP_OFFSET_FROM_REG(data->temp_offset[nr]));
}
static ssize_t show_temp_min(struct device *dev,
struct device_attribute *attr, char *buf)
{
Expand All @@ -606,6 +620,24 @@ static ssize_t show_temp_crit(struct device *dev,
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_crit[nr]));
}
static ssize_t set_temp_offset(struct device *dev,
struct device_attribute *attr, const char *buf,
size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
int nr = to_sensor_dev_attr(attr)->index;
int val;

val = simple_strtol(buf, NULL, 10);
val = SENSORS_LIMIT(val, -15000, 15000);
mutex_lock(&data->update_lock);
data->temp_offset[nr] = TEMP_OFFSET_TO_REG(val);
adm1031_write_value(client, ADM1031_REG_TEMP_OFFSET(nr),
data->temp_offset[nr]);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t set_temp_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
Expand Down Expand Up @@ -661,6 +693,8 @@ static ssize_t set_temp_crit(struct device *dev, struct device_attribute *attr,
#define temp_reg(offset) \
static SENSOR_DEVICE_ATTR(temp##offset##_input, S_IRUGO, \
show_temp, NULL, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_offset, S_IRUGO | S_IWUSR, \
show_temp_offset, set_temp_offset, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_min, S_IRUGO | S_IWUSR, \
show_temp_min, set_temp_min, offset - 1); \
static SENSOR_DEVICE_ATTR(temp##offset##_max, S_IRUGO | S_IWUSR, \
Expand Down Expand Up @@ -714,13 +748,15 @@ static struct attribute *adm1031_attributes[] = {
&sensor_dev_attr_pwm1.dev_attr.attr,
&sensor_dev_attr_auto_fan1_channel.dev_attr.attr,
&sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_offset.dev_attr.attr,
&sensor_dev_attr_temp1_min.dev_attr.attr,
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
&sensor_dev_attr_temp1_crit.dev_attr.attr,
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_input.dev_attr.attr,
&sensor_dev_attr_temp2_offset.dev_attr.attr,
&sensor_dev_attr_temp2_min.dev_attr.attr,
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp2_max.dev_attr.attr,
Expand Down Expand Up @@ -757,6 +793,7 @@ static struct attribute *adm1031_attributes_opt[] = {
&sensor_dev_attr_pwm2.dev_attr.attr,
&sensor_dev_attr_auto_fan2_channel.dev_attr.attr,
&sensor_dev_attr_temp3_input.dev_attr.attr,
&sensor_dev_attr_temp3_offset.dev_attr.attr,
&sensor_dev_attr_temp3_min.dev_attr.attr,
&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
&sensor_dev_attr_temp3_max.dev_attr.attr,
Expand Down Expand Up @@ -937,6 +974,9 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
}
data->temp[chan] = newh;

data->temp_offset[chan] =
adm1031_read_value(client,
ADM1031_REG_TEMP_OFFSET(chan));
data->temp_min[chan] =
adm1031_read_value(client,
ADM1031_REG_TEMP_MIN(chan));
Expand Down

0 comments on commit 49dc9ef

Please sign in to comment.