static ssize_t show_fault(struct device *dev,
struct device_attribute *devattr, char *buf)
{
int index = to_sensor_dev_attr(devattr)->index;
struct tmp421_data *data = tmp421_update_device(dev);
if (data->temp[index] & 0x01)
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t show_fault(struct device *dev,
struct device_attribute *devattr, char *buf)
{
int index = to_sensor_dev_attr(devattr)->index;
struct tmp421_data *data = tmp421_update_device(dev);
/*
* The OPEN bit signals a fault. This is bit 0 of the temperature
* register (low byte).
*/
if (data->temp[index] & 0x01)
return sprintf(buf, "1\n");
else
return sprintf(buf, "0\n");
}
static ssize_t show_temp_value(struct device *dev,
struct device_attribute *devattr, char *buf)
{
int index = to_sensor_dev_attr(devattr)->index;
struct tmp421_data *data = tmp421_update_device(dev);
int temp;
mutex_lock(&data->update_lock);
if (data->config & TMP421_CONFIG_RANGE)
temp = temp_from_u16(data->temp[index]);
else
temp = temp_from_s16(data->temp[index]);
mutex_unlock(&data->update_lock);
return sprintf(buf, "%d\n", temp);
}
static int tmp421_read(struct device *dev, enum hwmon_sensor_types type,
u32 attr, int channel, long *val)
{
struct tmp421_data *tmp421 = tmp421_update_device(dev);
switch (attr) {
case hwmon_temp_input:
if (tmp421->config & TMP421_CONFIG_RANGE)
*val = temp_from_u16(tmp421->temp[channel]);
else
*val = temp_from_s16(tmp421->temp[channel]);
return 0;
case hwmon_temp_fault:
/*
* The OPEN bit signals a fault. This is bit 0 of the temperature
* register (low byte).
*/
*val = tmp421->temp[channel] & 0x01;
return 0;
default:
return -EOPNOTSUPP;
}
}