lkml.org 
[lkml]   [2014]   [Nov]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 6/7] iio: dummy: Demonstrate the usage of new channel types
Date
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>
---
drivers/staging/iio/iio_simple_dummy.c | 199 +++++++++++++++++++++++---
drivers/staging/iio/iio_simple_dummy.h | 5 +
drivers/staging/iio/iio_simple_dummy_events.c | 43 ++++++
3 files changed, 229 insertions(+), 18 deletions(-)

diff --git a/drivers/staging/iio/iio_simple_dummy.c b/drivers/staging/iio/iio_simple_dummy.c
index bf78e6f..10a9e08 100644
--- a/drivers/staging/iio/iio_simple_dummy.c
+++ b/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;
}
diff --git a/drivers/staging/iio/iio_simple_dummy.h b/drivers/staging/iio/iio_simple_dummy.h
index ad89842..3b714b4 100644
--- a/drivers/staging/iio/iio_simple_dummy.h
+++ b/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;
diff --git a/drivers/staging/iio/iio_simple_dummy_events.c b/drivers/staging/iio/iio_simple_dummy_events.c
index 719dfa5..ac15a44 100644
--- a/drivers/staging/iio/iio_simple_dummy_events.c
+++ b/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;
}
--
1.9.1


\
 
 \ /
  Last update: 2014-11-10 14:21    [W:0.096 / U:2.204 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site