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iio: dummy: Demonstrate the usage of new channel types

Adds support for the new channel types in the dummy driver:
  * a new channel IIO_ACTIVITY
  * two state transition events (running and walking)
  * a new channel IIO_STEPS and support for reading and writing
    pedometer step counter
  * step detect event
  * a new IIO_CHAN_INFO_CALIBHEIGHT mask bit for reading and writing
    user's height.

Signed-off-by: Irina Tirdea <irina.tirdea@intel.com>
Signed-off-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
linux-4.1.4
Daniel Baluta 7 years ago
committed by Jonathan Cameron
parent
commit
3e34e650db
  1. 199
      drivers/staging/iio/iio_simple_dummy.c
  2. 5
      drivers/staging/iio/iio_simple_dummy.h
  3. 43
      drivers/staging/iio/iio_simple_dummy_events.c

199
drivers/staging/iio/iio_simple_dummy.c

@ -69,6 +69,34 @@ static const struct iio_event_spec iio_dummy_event = {
.mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
};
/*
* simple step detect event - triggered when a step is detected
*/
static const struct iio_event_spec step_detect_event = {
.type = IIO_EV_TYPE_INSTANCE,
.dir = IIO_EV_DIR_NONE,
.mask_separate = BIT(IIO_EV_INFO_ENABLE),
};
/*
* simple transition event - triggered when the reported running confidence
* value rises above a threshold value
*/
static const struct iio_event_spec iio_running_event = {
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_RISING,
.mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
};
/*
* simple transition event - triggered when the reported walking confidence
* value falls under a threshold value
*/
static const struct iio_event_spec iio_walking_event = {
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_FALLING,
.mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
};
#endif
/*
@ -215,6 +243,37 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
.indexed = 1,
.channel = 0,
},
{
.type = IIO_STEPS,
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_ENABLE) |
BIT(IIO_CHAN_INFO_CALIBHEIGHT),
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
.scan_index = -1,
#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
.event_spec = &step_detect_event,
.num_event_specs = 1,
#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
},
{
.type = IIO_ACTIVITY,
.modified = 1,
.channel2 = IIO_MOD_RUNNING,
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
.event_spec = &iio_running_event,
.num_event_specs = 1,
#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
},
{
.type = IIO_ACTIVITY,
.modified = 1,
.channel2 = IIO_MOD_WALKING,
.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
.event_spec = &iio_walking_event,
.num_event_specs = 1,
#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
},
};
/**
@ -263,24 +322,55 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
break;
}
break;
case IIO_CHAN_INFO_PROCESSED:
switch (chan->type) {
case IIO_STEPS:
*val = st->steps;
ret = IIO_VAL_INT;
break;
case IIO_ACTIVITY:
switch (chan->channel2) {
case IIO_MOD_RUNNING:
*val = st->activity_running;
ret = IIO_VAL_INT;
break;
case IIO_MOD_WALKING:
*val = st->activity_walking;
ret = IIO_VAL_INT;
break;
default:
break;
}
break;
default:
break;
}
break;
case IIO_CHAN_INFO_OFFSET:
/* only single ended adc -> 7 */
*val = 7;
ret = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_SCALE:
switch (chan->differential) {
case 0:
/* only single ended adc -> 0.001333 */
*val = 0;
*val2 = 1333;
ret = IIO_VAL_INT_PLUS_MICRO;
switch (chan->type) {
case IIO_VOLTAGE:
switch (chan->differential) {
case 0:
/* only single ended adc -> 0.001333 */
*val = 0;
*val2 = 1333;
ret = IIO_VAL_INT_PLUS_MICRO;
break;
case 1:
/* all differential adc channels ->
* 0.000001344 */
*val = 0;
*val2 = 1344;
ret = IIO_VAL_INT_PLUS_NANO;
}
break;
default:
break;
case 1:
/* all differential adc channels -> 0.000001344 */
*val = 0;
*val2 = 1344;
ret = IIO_VAL_INT_PLUS_NANO;
}
break;
case IIO_CHAN_INFO_CALIBBIAS:
@ -298,6 +388,27 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
*val2 = 33;
ret = IIO_VAL_INT_PLUS_NANO;
break;
case IIO_CHAN_INFO_ENABLE:
switch (chan->type) {
case IIO_STEPS:
*val = st->steps_enabled;
ret = IIO_VAL_INT;
break;
default:
break;
}
break;
case IIO_CHAN_INFO_CALIBHEIGHT:
switch (chan->type) {
case IIO_STEPS:
*val = st->height;
ret = IIO_VAL_INT;
break;
default:
break;
}
break;
default:
break;
}
@ -330,14 +441,45 @@ static int iio_dummy_write_raw(struct iio_dev *indio_dev,
switch (mask) {
case IIO_CHAN_INFO_RAW:
if (chan->output == 0)
switch (chan->type) {
case IIO_VOLTAGE:
if (chan->output == 0)
return -EINVAL;
/* Locking not required as writing single value */
mutex_lock(&st->lock);
st->dac_val = val;
mutex_unlock(&st->lock);
return 0;
default:
return -EINVAL;
/* Locking not required as writing single value */
mutex_lock(&st->lock);
st->dac_val = val;
mutex_unlock(&st->lock);
return 0;
}
case IIO_CHAN_INFO_PROCESSED:
switch (chan->type) {
case IIO_STEPS:
mutex_lock(&st->lock);
st->steps = val;
mutex_unlock(&st->lock);
return 0;
case IIO_ACTIVITY:
if (val < 0)
val = 0;
if (val > 100)
val = 100;
switch (chan->channel2) {
case IIO_MOD_RUNNING:
st->activity_running = val;
return 0;
case IIO_MOD_WALKING:
st->activity_walking = val;
return 0;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
case IIO_CHAN_INFO_CALIBSCALE:
mutex_lock(&st->lock);
/* Compare against table - hard matching here */
@ -356,6 +498,24 @@ static int iio_dummy_write_raw(struct iio_dev *indio_dev,
st->accel_calibbias = val;
mutex_unlock(&st->lock);
return 0;
case IIO_CHAN_INFO_ENABLE:
switch (chan->type) {
case IIO_STEPS:
mutex_lock(&st->lock);
st->steps_enabled = val;
mutex_unlock(&st->lock);
return 0;
default:
return -EINVAL;
}
case IIO_CHAN_INFO_CALIBHEIGHT:
switch (chan->type) {
case IIO_STEPS:
st->height = val;
return 0;
default:
return -EINVAL;
}
default:
return -EINVAL;
@ -395,6 +555,9 @@ static int iio_dummy_init_device(struct iio_dev *indio_dev)
st->accel_val = 34;
st->accel_calibbias = -7;
st->accel_calibscale = &dummy_scales[0];
st->steps = 47;
st->activity_running = 98;
st->activity_walking = 4;
return 0;
}

5
drivers/staging/iio/iio_simple_dummy.h

@ -34,9 +34,14 @@ struct iio_dummy_state {
int differential_adc_val[2];
int accel_val;
int accel_calibbias;
int activity_running;
int activity_walking;
const struct iio_dummy_accel_calibscale *accel_calibscale;
struct mutex lock;
struct iio_dummy_regs *regs;
int steps_enabled;
int steps;
int height;
#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
int event_irq;
int event_val;

43
drivers/staging/iio/iio_simple_dummy_events.c

@ -72,6 +72,22 @@ int iio_simple_dummy_write_event_config(struct iio_dev *indio_dev,
st->event_en = state;
else
return -EINVAL;
default:
return -EINVAL;
}
break;
case IIO_ACTIVITY:
switch (type) {
case IIO_EV_TYPE_THRESH:
st->event_en = state;
break;
default:
return -EINVAL;
}
case IIO_STEPS:
switch (type) {
case IIO_EV_TYPE_INSTANCE:
st->event_en = state;
break;
default:
return -EINVAL;
@ -161,6 +177,33 @@ static irqreturn_t iio_simple_dummy_event_handler(int irq, void *private)
IIO_EV_TYPE_THRESH, 0, 0, 0),
iio_get_time_ns());
break;
case 1:
if (st->activity_running > st->event_val)
iio_push_event(indio_dev,
IIO_EVENT_CODE(IIO_ACTIVITY, 0,
IIO_MOD_RUNNING,
IIO_EV_DIR_RISING,
IIO_EV_TYPE_THRESH,
0, 0, 0),
iio_get_time_ns());
break;
case 2:
if (st->activity_walking < st->event_val)
iio_push_event(indio_dev,
IIO_EVENT_CODE(IIO_ACTIVITY, 0,
IIO_MOD_WALKING,
IIO_EV_DIR_FALLING,
IIO_EV_TYPE_THRESH,
0, 0, 0),
iio_get_time_ns());
break;
case 3:
iio_push_event(indio_dev,
IIO_EVENT_CODE(IIO_STEPS, 0, IIO_NO_MOD,
IIO_EV_DIR_NONE,
IIO_EV_TYPE_INSTANCE, 0, 0, 0),
iio_get_time_ns());
break;
default:
break;
}

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