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staging:iio:ad7291: Switch to new event config interface 

Switch the ad7291 driver to the new IIO event config interface as the old one
is going to be removed.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2013-10-07 15:11:00 +01:00 committed by Jonathan Cameron
parent 129c3f611a
commit b80a674b8d
1 changed files with 59 additions and 37 deletions
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96
drivers/staging/iio/adc/ad7291.c
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@ -248,13 +248,14 @@ static struct attribute *ad7291_event_attributes[] = {
NULL,
};
static unsigned int ad7291_threshold_reg(u64 event_code)
static unsigned int ad7291_threshold_reg(const struct iio_chan_spec *chan,
enum iio_event_direction dir)
{
unsigned int offset;
switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
switch (chan->type) {
case IIO_VOLTAGE:
offset = IIO_EVENT_CODE_EXTRACT_CHAN(event_code);
offset = chan->channel;
break;
case IIO_TEMP:
offset = 8;
@ -263,43 +264,49 @@ static unsigned int ad7291_threshold_reg(u64 event_code)
return 0;
}
if (IIO_EVENT_CODE_EXTRACT_DIR(event_code) == IIO_EV_DIR_FALLING)
if (dir == IIO_EV_DIR_FALLING)
return AD7291_DATA_LOW(offset);
else
return AD7291_DATA_HIGH(offset);
}
static int ad7291_read_event_value(struct iio_dev *indio_dev,
u64 event_code,
int *val)
const struct iio_chan_spec *chan,
enum iio_event_type type,
enum iio_event_direction dir,
enum iio_event_info info,
int *val, int *val2)
{
struct ad7291_chip_info *chip = iio_priv(indio_dev);
int ret;
u16 uval;
ret = ad7291_i2c_read(chip, ad7291_threshold_reg(event_code), &uval);
ret = ad7291_i2c_read(chip, ad7291_threshold_reg(chan, dir), &uval);
if (ret < 0)
return ret;
switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
switch (chan->type) {
case IIO_VOLTAGE:
*val = uval & AD7291_VALUE_MASK;
return 0;
return IIO_VAL_INT;
case IIO_TEMP:
*val = sign_extend32(uval, 11);
return 0;
return IIO_VAL_INT;
default:
return -EINVAL;
};
}
static int ad7291_write_event_value(struct iio_dev *indio_dev,
u64 event_code,
int val)
const struct iio_chan_spec *chan,
enum iio_event_type type,
enum iio_event_direction dir,
enum iio_event_info info,
int val, int val2)
{
struct ad7291_chip_info *chip = iio_priv(indio_dev);
switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
switch (chan->type) {
case IIO_VOLTAGE:
if (val > AD7291_VALUE_MASK || val < 0)
return -EINVAL;
@ -312,20 +319,21 @@ static int ad7291_write_event_value(struct iio_dev *indio_dev,
return -EINVAL;
}
return ad7291_i2c_write(chip, ad7291_threshold_reg(event_code), val);
return ad7291_i2c_write(chip, ad7291_threshold_reg(chan, dir), val);
}
static int ad7291_read_event_config(struct iio_dev *indio_dev,
u64 event_code)
const struct iio_chan_spec *chan,
enum iio_event_type type,
enum iio_event_direction dir)
{
struct ad7291_chip_info *chip = iio_priv(indio_dev);
/* To be enabled the channel must simply be on. If any are enabled
we are in continuous sampling mode */
switch (IIO_EVENT_CODE_EXTRACT_CHAN_TYPE(event_code)) {
switch (chan->type) {
case IIO_VOLTAGE:
if (chip->c_mask &
(1 << (15 - IIO_EVENT_CODE_EXTRACT_CHAN(event_code))))
if (chip->c_mask & (1 << (15 - chan->channel)))
return 1;
else
return 0;
@ -339,11 +347,14 @@ static int ad7291_read_event_config(struct iio_dev *indio_dev,
}
static int ad7291_write_event_config(struct iio_dev *indio_dev,
u64 event_code,
const struct iio_chan_spec *chan,
enum iio_event_type type,
enum iio_event_direction dir,
int state)
{
int ret = 0;
struct ad7291_chip_info *chip = iio_priv(indio_dev);
unsigned int mask;
u16 regval;
mutex_lock(&chip->state_lock);
@ -354,16 +365,14 @@ static int ad7291_write_event_config(struct iio_dev *indio_dev,
* Possible to disable temp as well but that makes single read tricky.
*/
switch (IIO_EVENT_CODE_EXTRACT_TYPE(event_code)) {
mask = BIT(15 - chan->channel);
switch (chan->type) {
case IIO_VOLTAGE:
if ((!state) && (chip->c_mask & (1 << (15 -
IIO_EVENT_CODE_EXTRACT_CHAN(event_code)))))
chip->c_mask &= ~(1 << (15 - IIO_EVENT_CODE_EXTRACT_CHAN
(event_code)));
else if (state && (!(chip->c_mask & (1 << (15 -
IIO_EVENT_CODE_EXTRACT_CHAN(event_code))))))
chip->c_mask |= (1 << (15 - IIO_EVENT_CODE_EXTRACT_CHAN
(event_code)));
if ((!state) && (chip->c_mask & mask))
chip->c_mask &= ~mask;
else if (state && (!(chip->c_mask & mask)))
chip->c_mask |= mask;
else
break;
@ -473,6 +482,20 @@ static int ad7291_read_raw(struct iio_dev *indio_dev,
}
}
static const struct iio_event_spec ad7291_events[] = {
{
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_RISING,
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_ENABLE),
}, {
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_FALLING,
.mask_separate = BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_ENABLE),
},
};
#define AD7291_VOLTAGE_CHAN(_chan) \
{ \
.type = IIO_VOLTAGE, \
@ -480,8 +503,8 @@ static int ad7291_read_raw(struct iio_dev *indio_dev,
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
.indexed = 1, \
.channel = _chan, \
.event_mask = IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING)|\
IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING) \
.event_spec = ad7291_events, \
.num_event_specs = ARRAY_SIZE(ad7291_events), \
}
static const struct iio_chan_spec ad7291_channels[] = {
@ -500,9 +523,8 @@ static const struct iio_chan_spec ad7291_channels[] = {
BIT(IIO_CHAN_INFO_SCALE),
.indexed = 1,
.channel = 0,
.event_mask =
IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING)|
IIO_EV_BIT(IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING)
.event_spec = ad7291_events,
.num_event_specs = ARRAY_SIZE(ad7291_events),
}
};
@ -512,10 +534,10 @@ static struct attribute_group ad7291_event_attribute_group = {
static const struct iio_info ad7291_info = {
.read_raw = &ad7291_read_raw,
.read_event_config = &ad7291_read_event_config,
.write_event_config = &ad7291_write_event_config,
.read_event_value = &ad7291_read_event_value,
.write_event_value = &ad7291_write_event_value,
.read_event_config_new = &ad7291_read_event_config,
.write_event_config_new = &ad7291_write_event_config,
.read_event_value_new = &ad7291_read_event_value,
.write_event_value_new = &ad7291_write_event_value,
.event_attrs = &ad7291_event_attribute_group,
.driver_module = THIS_MODULE,
};