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staging:iio:accel:sca3000: Move temperature attribute to channels

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differantiate between channels with_temp and without

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Peter Meerwald 2014-01-13 21:28:00 +00:00 committed by Jonathan Cameron
parent 735165a8ee
commit bb0090e99b
1 changed files with 48 additions and 77 deletions
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125
drivers/staging/iio/accel/sca3000_core.c
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@ -450,6 +450,18 @@ static const struct iio_chan_spec sca3000_channels[] = {
SCA3000_CHAN(2, IIO_MOD_Z),
};
static const struct iio_chan_spec sca3000_channels_with_temp[] = {
SCA3000_CHAN(0, IIO_MOD_X),
SCA3000_CHAN(1, IIO_MOD_Y),
SCA3000_CHAN(2, IIO_MOD_Z),
{
.type = IIO_TEMP,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OFFSET),
},
};
static u8 sca3000_addresses[3][3] = {
[0] = {SCA3000_REG_ADDR_X_MSB, SCA3000_REG_CTRL_SEL_MD_X_TH,
SCA3000_MD_CTRL_OR_X},
@ -472,19 +484,30 @@ static int sca3000_read_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
mutex_lock(&st->lock);
if (st->mo_det_use_count) {
mutex_unlock(&st->lock);
return -EBUSY;
if (chan->type == IIO_ACCEL) {
if (st->mo_det_use_count) {
mutex_unlock(&st->lock);
return -EBUSY;
}
address = sca3000_addresses[chan->address][0];
ret = sca3000_read_data_short(st, address, 2);
if (ret < 0) {
mutex_unlock(&st->lock);
return ret;
}
*val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;
*val = ((*val) << (sizeof(*val)*8 - 13)) >>
(sizeof(*val)*8 - 13);
} else {
/* get the temperature when available */
ret = sca3000_read_data_short(st,
SCA3000_REG_ADDR_TEMP_MSB, 2);
if (ret < 0) {
mutex_unlock(&st->lock);
return ret;
}
*val = ((st->rx[0] & 0x3F) << 3) | ((st->rx[1] & 0xE0) >> 5);
}
address = sca3000_addresses[chan->address][0];
ret = sca3000_read_data_short(st, address, 2);
if (ret < 0) {
mutex_unlock(&st->lock);
return ret;
}
*val = (be16_to_cpup((__be16 *)st->rx) >> 3) & 0x1FFF;
*val = ((*val) << (sizeof(*val)*8 - 13)) >>
(sizeof(*val)*8 - 13);
mutex_unlock(&st->lock);
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
@ -494,6 +517,10 @@ static int sca3000_read_raw(struct iio_dev *indio_dev,
else /* temperature */
*val2 = 555556;
return IIO_VAL_INT_PLUS_MICRO;
case IIO_CHAN_INFO_OFFSET:
*val = -214;
*val2 = 600000;
return IIO_VAL_INT_PLUS_MICRO;
default:
return -EINVAL;
}
@ -673,37 +700,6 @@ static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
sca3000_read_frequency,
sca3000_set_frequency);
/**
* sca3000_read_temp() sysfs interface to get the temperature when available
*
* The alignment of data in here is downright odd. See data sheet.
* Converting this into a meaningful value is left to inline functions in
* userspace part of header.
**/
static ssize_t sca3000_read_temp(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct sca3000_state *st = iio_priv(indio_dev);
int ret;
int val;
ret = sca3000_read_data_short(st, SCA3000_REG_ADDR_TEMP_MSB, 2);
if (ret < 0)
goto error_ret;
val = ((st->rx[0] & 0x3F) << 3) | ((st->rx[1] & 0xE0) >> 5);
return sprintf(buf, "%d\n", val);
error_ret:
return ret;
}
static IIO_DEV_ATTR_TEMP_RAW(sca3000_read_temp);
static IIO_CONST_ATTR_TEMP_SCALE("0.555556");
static IIO_CONST_ATTR_TEMP_OFFSET("-214.6");
/**
* sca3000_read_thresh() - query of a threshold
**/
@ -783,27 +779,10 @@ static struct attribute *sca3000_attributes[] = {
NULL,
};
static struct attribute *sca3000_attributes_with_temp[] = {
&iio_dev_attr_revision.dev_attr.attr,
&iio_dev_attr_measurement_mode_available.dev_attr.attr,
&iio_dev_attr_measurement_mode.dev_attr.attr,
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
&iio_dev_attr_sampling_frequency.dev_attr.attr,
/* Only present if temp sensor is */
&iio_dev_attr_in_temp_raw.dev_attr.attr,
&iio_const_attr_in_temp_offset.dev_attr.attr,
&iio_const_attr_in_temp_scale.dev_attr.attr,
NULL,
};
static const struct attribute_group sca3000_attribute_group = {
.attrs = sca3000_attributes,
};
static const struct attribute_group sca3000_attribute_group_with_temp = {
.attrs = sca3000_attributes_with_temp,
};
/**
* sca3000_event_handler() - handling ring and non ring events
*
@ -1138,17 +1117,6 @@ static const struct iio_info sca3000_info = {
.driver_module = THIS_MODULE,
};
static const struct iio_info sca3000_info_with_temp = {
.attrs = &sca3000_attribute_group_with_temp,
.read_raw = &sca3000_read_raw,
.event_attrs = &sca3000_event_attribute_group,
.read_event_value = &sca3000_read_thresh,
.write_event_value = &sca3000_write_thresh,
.read_event_config = &sca3000_read_event_config,
.write_event_config = &sca3000_write_event_config,
.driver_module = THIS_MODULE,
};
static int sca3000_probe(struct spi_device *spi)
{
int ret;
@ -1168,12 +1136,15 @@ static int sca3000_probe(struct spi_device *spi)
indio_dev->dev.parent = &spi->dev;
indio_dev->name = spi_get_device_id(spi)->name;
if (st->info->temp_output)
indio_dev->info = &sca3000_info_with_temp;
else
indio_dev->info = &sca3000_info;
indio_dev->channels = sca3000_channels;
indio_dev->num_channels = ARRAY_SIZE(sca3000_channels);
indio_dev->info = &sca3000_info;
if (st->info->temp_output) {
indio_dev->channels = sca3000_channels_with_temp;
indio_dev->num_channels =
ARRAY_SIZE(sca3000_channels_with_temp);
} else {
indio_dev->channels = sca3000_channels;
indio_dev->num_channels = ARRAY_SIZE(sca3000_channels);
}
indio_dev->modes = INDIO_DIRECT_MODE;
sca3000_configure_ring(indio_dev);