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hwmon: (lm75) Add update_interval attribute

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Since we know the chip's update interval, let's make it available
to the user.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2016-06-19 17:56:22 -07:00
parent 38aefb41b3
commit 5f7e5e29ab
1 changed files with 13 additions and 0 deletions
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13
drivers/hwmon/lm75.c
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@ -159,16 +159,29 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *da,
return count; return count;
} }
static ssize_t show_update_interval(struct device *dev,
struct device_attribute *da, char *buf)
{
struct lm75_data *data = lm75_update_device(dev);
if (IS_ERR(data))
return PTR_ERR(data);
return sprintf(buf, "%u\n", jiffies_to_msecs(data->sample_time));
}
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
show_temp, set_temp, 1); show_temp, set_temp, 1);
static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO, static SENSOR_DEVICE_ATTR(temp1_max_hyst, S_IWUSR | S_IRUGO,
show_temp, set_temp, 2); show_temp, set_temp, 2);
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0); static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp, NULL, 0);
static DEVICE_ATTR(update_interval, S_IRUGO, show_update_interval, NULL);
static struct attribute *lm75_attrs[] = { static struct attribute *lm75_attrs[] = {
&sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_input.dev_attr.attr,
&sensor_dev_attr_temp1_max.dev_attr.attr, &sensor_dev_attr_temp1_max.dev_attr.attr,
&sensor_dev_attr_temp1_max_hyst.dev_attr.attr, &sensor_dev_attr_temp1_max_hyst.dev_attr.attr,
&dev_attr_update_interval.attr,
NULL NULL
}; };