static ssize_t ad7314_show_temperature(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ad7314_data *chip = dev_get_drvdata(dev);
s16 data;
int ret;
ret = ad7314_spi_read(chip);
if (ret < 0)
return ret;
switch (spi_get_device_id(chip->spi_dev)->driver_data) {
case ad7314:
data = (ret & AD7314_TEMP_MASK) >> AD7314_TEMP_SHIFT;
data = (data << 6) >> 6;
return sprintf(buf, "%d\n", 250 * data);
case adt7301:
case adt7302:
/*
* Documented as a 13 bit twos complement register
* with a sign bit - which is a 14 bit 2's complement
* register. 1lsb - 31.25 milli degrees centigrade
*/
data = ret & ADT7301_TEMP_MASK;
data = (data << 2) >> 2;
return sprintf(buf, "%d\n",
DIV_ROUND_CLOSEST(data * 3125, 100));
default:
return -EINVAL;
}
}
static ssize_t ad7314_show_temperature(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct ad7314_data *chip = dev_get_drvdata(dev);
s16 data;
int ret;
ret = ad7314_spi_read(chip);
if (ret < 0)
return ret;
switch (spi_get_device_id(chip->spi_dev)->driver_data) {
case ad7314:
data = (ret & AD7314_TEMP_MASK) >> AD7314_TEMP_OFFSET;
data = (data << 6) >> 6;
return sprintf(buf, "%d\n", 250 * data);
case adt7301:
case adt7302:
data = ret & ADT7301_TEMP_MASK;
data = (data << 2) >> 2;
return sprintf(buf, "%d\n",
DIV_ROUND_CLOSEST(data * 3125, 100));
default:
return -EINVAL;
}
}
static ssize_t ad7314_show_temperature(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *dev_info = dev_get_drvdata(dev);
struct ad7314_chip_info *chip = dev_info->dev_data;
u16 data;
char sign = ' ';
int ret;
if (chip->mode) {
ret = ad7314_spi_write(chip, 0);
if (ret)
return -EIO;
}
ret = ad7314_spi_read(chip, &data);
if (ret)
return -EIO;
if (chip->mode)
ad7314_spi_write(chip, chip->mode);
if (strcmp(dev_info->name, "ad7314")) {
data = (data & AD7314_TEMP_MASK) >>
AD7314_TEMP_OFFSET;
if (data & AD7314_TEMP_SIGN) {
data = (AD7314_TEMP_SIGN << 1) - data;
sign = '-';
}
return sprintf(buf, "%c%d.%.2d\n", sign,
data >> AD7314_TEMP_FLOAT_OFFSET,
(data & AD7314_TEMP_FLOAT_MASK) * 25);
} else {
