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hwmon: (adm1031) Replace update_rate sysfs attribute with update_interval

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The attribute reflects an interval, not a rate.

Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Acked-by: Ira W. Snyder <iws@ovro.caltech.edu>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Guenter Roeck 2010-09-17 17:24:14 +02:00 committed by Jean Delvare
parent 022b75a3df
commit a51b9944a1
2 changed files with 27 additions and 23 deletions
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7
Documentation/hwmon/sysfs-interface
View File

@ -91,12 +91,11 @@ name The chip name.
I2C devices get this attribute created automatically.
RO
update_rate The rate at which the chip will update readings.
update_interval The interval at which the chip will update readings.
Unit: millisecond
RW
Some devices have a variable update rate. This attribute
can be used to change the update rate to the desired
frequency.
Some devices have a variable update rate or interval.
This attribute can be used to change it to the desired value.
************

43
drivers/hwmon/adm1031.c
View File

@ -79,7 +79,7 @@ struct adm1031_data {
int chip_type;
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
unsigned int update_rate; /* In milliseconds */
unsigned int update_interval; /* In milliseconds */
/* The chan_select_table contains the possible configurations for
* auto fan control.
*/
@ -743,23 +743,23 @@ static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 13);
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
/* Update Rate */
static const unsigned int update_rates[] = {
/* Update Interval */
static const unsigned int update_intervals[] = {
16000, 8000, 4000, 2000, 1000, 500, 250, 125,
};
static ssize_t show_update_rate(struct device *dev,
struct device_attribute *attr, char *buf)
static ssize_t show_update_interval(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct adm1031_data *data = i2c_get_clientdata(client);
return sprintf(buf, "%u\n", data->update_rate);
return sprintf(buf, "%u\n", data->update_interval);
}
static ssize_t set_update_rate(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
static ssize_t set_update_interval(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);
@ -771,12 +771,15 @@ static ssize_t set_update_rate(struct device *dev,
if (err)
return err;
/* find the nearest update rate from the table */
for (i = 0; i < ARRAY_SIZE(update_rates) - 1; i++) {
if (val >= update_rates[i])
/*
* Find the nearest update interval from the table.
* Use it to determine the matching update rate.
*/
for (i = 0; i < ARRAY_SIZE(update_intervals) - 1; i++) {
if (val >= update_intervals[i])
break;
}
/* if not found, we point to the last entry (lowest update rate) */
/* if not found, we point to the last entry (lowest update interval) */
/* set the new update rate while preserving other settings */
reg = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
@ -785,14 +788,14 @@ static ssize_t set_update_rate(struct device *dev,
adm1031_write_value(client, ADM1031_REG_FAN_FILTER, reg);
mutex_lock(&data->update_lock);
data->update_rate = update_rates[i];
data->update_interval = update_intervals[i];
mutex_unlock(&data->update_lock);
return count;
}
static DEVICE_ATTR(update_rate, S_IRUGO | S_IWUSR, show_update_rate,
set_update_rate);
static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
set_update_interval);
static struct attribute *adm1031_attributes[] = {
&sensor_dev_attr_fan1_input.dev_attr.attr,
@ -830,7 +833,7 @@ static struct attribute *adm1031_attributes[] = {
&sensor_dev_attr_auto_fan1_min_pwm.dev_attr.attr,
&dev_attr_update_rate.attr,
&dev_attr_update_interval.attr,
&dev_attr_alarms.attr,
NULL
@ -981,7 +984,8 @@ static void adm1031_init_client(struct i2c_client *client)
mask = ADM1031_UPDATE_RATE_MASK;
read_val = adm1031_read_value(client, ADM1031_REG_FAN_FILTER);
i = (read_val & mask) >> ADM1031_UPDATE_RATE_SHIFT;
data->update_rate = update_rates[i];
/* Save it as update interval */
data->update_interval = update_intervals[i];
}
static struct adm1031_data *adm1031_update_device(struct device *dev)
@ -993,7 +997,8 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
mutex_lock(&data->update_lock);
next_update = data->last_updated + msecs_to_jiffies(data->update_rate);
next_update = data->last_updated
+ msecs_to_jiffies(data->update_interval);
if (time_after(jiffies, next_update) || !data->valid) {
dev_dbg(&client->dev, "Starting adm1031 update\n");