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Date: Thu, 2 Oct 2014 16:43:58 +0300
From: Daniel Baluta <daniel.baluta@...el.com>
To: jic23@...nel.org, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: daniel.baluta@...el.com, irina.tirdea@...el.com
Subject: [RFC PATCH 7/8] iio: dummy: Demonstrate the usage of activity channel
Adds support for the activity channel in the dummy driver:
- a new channel IIO_ACTIVITY
- support for reading and writing pedometer step counter
- step detect event
- motion detect event
Signed-off-by: Irina Tirdea <irina.tirdea@...el.com>
Signed-off-by: Daniel Baluta <daniel.baluta@...el.com>
---
drivers/staging/iio/iio_simple_dummy.c | 87 ++++++++++++++++++++++++---
drivers/staging/iio/iio_simple_dummy.h | 2 +
drivers/staging/iio/iio_simple_dummy_events.c | 14 +++++
3 files changed, 95 insertions(+), 8 deletions(-)
diff --git a/drivers/staging/iio/iio_simple_dummy.c b/drivers/staging/iio/iio_simple_dummy.c
index bf78e6f..b3becee 100644
--- a/drivers/staging/iio/iio_simple_dummy.c
+++ b/drivers/staging/iio/iio_simple_dummy.c
@@ -69,6 +69,20 @@ static const struct iio_event_spec iio_dummy_event = {
.mask_separate = BIT(IIO_EV_INFO_VALUE) | BIT(IIO_EV_INFO_ENABLE),
};
+/*
+ * simple activity events:
+ * motion: triggered when an activity (walking, running, etc.) is detected
+ * step detect: triggered when a step is detected
+ */
+static const struct iio_event_spec activity_events[] = {
+ {
+ .type = IIO_EV_TYPE_MOTION,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ }, {
+ .type = IIO_EV_TYPE_STEP_DETECT,
+ .mask_separate = BIT(IIO_EV_INFO_ENABLE),
+ },
+};
#endif
/*
@@ -215,6 +229,20 @@ static const struct iio_chan_spec iio_dummy_channels[] = {
.indexed = 1,
.channel = 0,
},
+ {
+ .type = IIO_ACTIVITY,
+ .modified = 1,
+ .channel2 = IIO_MOD_PED_STEPS,
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_ENABLE),
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW),
+ },
+#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
+ {
+ .type = IIO_ACTIVITY,
+ .event_spec = activity_events,
+ .num_event_specs = ARRAY_SIZE(activity_events),
+ },
+#endif /* CONFIG_IIO_SIMPLE_DUMMY_EVENTS */
};
/**
@@ -259,6 +287,14 @@ static int iio_dummy_read_raw(struct iio_dev *indio_dev,
*val = st->accel_val;
ret = IIO_VAL_INT;
break;
+ case IIO_ACTIVITY:
+ switch (chan->channel2) {
+ case IIO_MOD_PED_STEPS:
+ *val = st->ped_steps;
+ ret = IIO_VAL_INT;
+ break;
+ }
+ break;
default:
break;
}
@@ -298,6 +334,16 @@ 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_ACTIVITY:
+ *val = st->ped_enabled;
+ ret = IIO_VAL_INT;
+ break;
+ default:
+ break;
+ }
+ break;
default:
break;
}
@@ -330,14 +376,29 @@ 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;
+ case IIO_ACTIVITY:
+ switch (chan->channel2) {
+ case IIO_MOD_PED_STEPS:
+ mutex_lock(&st->lock);
+ st->ped_steps = val;
+ mutex_unlock(&st->lock);
+ return 0;
+ default:
+ return -EINVAL;
+ }
+ 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_CALIBSCALE:
mutex_lock(&st->lock);
/* Compare against table - hard matching here */
@@ -356,7 +417,16 @@ 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_ACTIVITY:
+ mutex_lock(&st->lock);
+ st->ped_enabled = val;
+ mutex_unlock(&st->lock);
+ return 0;
+ default:
+ return -EINVAL;
+ }
default:
return -EINVAL;
}
@@ -395,6 +465,7 @@ 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->ped_steps = 47;
return 0;
}
diff --git a/drivers/staging/iio/iio_simple_dummy.h b/drivers/staging/iio/iio_simple_dummy.h
index 1a74e26..1996e3f 100644
--- a/drivers/staging/iio/iio_simple_dummy.h
+++ b/drivers/staging/iio/iio_simple_dummy.h
@@ -34,6 +34,8 @@ struct iio_dummy_state {
int accel_calibbias;
const struct iio_dummy_accel_calibscale *accel_calibscale;
struct mutex lock;
+ int ped_enabled;
+ int ped_steps;
struct iio_dummy_regs *regs;
#ifdef CONFIG_IIO_SIMPLE_DUMMY_EVENTS
int event_irq;
diff --git a/drivers/staging/iio/iio_simple_dummy_events.c b/drivers/staging/iio/iio_simple_dummy_events.c
index 719dfa5..94de22a 100644
--- a/drivers/staging/iio/iio_simple_dummy_events.c
+++ b/drivers/staging/iio/iio_simple_dummy_events.c
@@ -161,6 +161,20 @@ 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:
+ iio_push_event(indio_dev,
+ IIO_EVENT_CODE(IIO_ACTIVITY, 0, IIO_MOD_RUNNING,
+ IIO_EV_DIR_RISING,
+ IIO_EV_TYPE_MOTION, 0, 0, 0),
+ iio_get_time_ns());
+ break;
+ case 2:
+ iio_push_event(indio_dev,
+ IIO_EVENT_CODE(IIO_ACTIVITY, 0, IIO_NO_MOD,
+ IIO_EV_DIR_EITHER,
+ IIO_EV_TYPE_STEP_DETECT, 0, 0, 0),
+ iio_get_time_ns());
+ break;
default:
break;
}
--
1.9.1
--
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