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#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/sysfs.h>
#include <linux/list.h>
#include <linux/spi/spi.h>
#include "../iio.h"
#include "../sysfs.h"
#include "../trigger.h"
#include "adis16209.h"
/**
* adis16209_data_rdy_trig_poll() the event handler for the data rdy trig
**/
static int adis16209_data_rdy_trig_poll(struct iio_dev *dev_info,
int index,
s64 timestamp,
int no_test)
{
struct adis16209_state *st = iio_dev_get_devdata(dev_info);
struct iio_trigger *trig = st->trig;
iio_trigger_poll(trig, timestamp);
return IRQ_HANDLED;
}
IIO_EVENT_SH(data_rdy_trig, &adis16209_data_rdy_trig_poll);
static IIO_TRIGGER_NAME_ATTR;
static struct attribute *adis16209_trigger_attrs[] = {
&dev_attr_name.attr,
NULL,
};
static const struct attribute_group adis16209_trigger_attr_group = {
.attrs = adis16209_trigger_attrs,
};
/**
* adis16209_data_rdy_trigger_set_state() set datardy interrupt state
**/
static int adis16209_data_rdy_trigger_set_state(struct iio_trigger *trig,
bool state)
{
struct adis16209_state *st = trig->private_data;
struct iio_dev *indio_dev = st->indio_dev;
int ret = 0;
dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
ret = adis16209_set_irq(&st->indio_dev->dev, state);
if (state == false) {
iio_remove_event_from_list(&iio_event_data_rdy_trig,
&indio_dev->interrupts[0]
->ev_list);
flush_scheduled_work();
} else {
iio_add_event_to_list(&iio_event_data_rdy_trig,
&indio_dev->interrupts[0]->ev_list);
}
return ret;
}
/**
* adis16209_trig_try_reen() try renabling irq for data rdy trigger
* @trig: the datardy trigger
**/
static int adis16209_trig_try_reen(struct iio_trigger *trig)
{
struct adis16209_state *st = trig->private_data;
enable_irq(st->us->irq);
return 0;
}
int adis16209_probe_trigger(struct iio_dev *indio_dev)
{
int ret;
struct adis16209_state *st = indio_dev->dev_data;
st->trig = iio_allocate_trigger();
st->trig->name = kasprintf(GFP_KERNEL,
"adis16209-dev%d",
indio_dev->id);
if (!st->trig->name) {
ret = -ENOMEM;
goto error_free_trig;
}
st->trig->dev.parent = &st->us->dev;
st->trig->owner = THIS_MODULE;
st->trig->private_data = st;
st->trig->set_trigger_state = &adis16209_data_rdy_trigger_set_state;
st->trig->try_reenable = &adis16209_trig_try_reen;
st->trig->control_attrs = &adis16209_trigger_attr_group;
ret = iio_trigger_register(st->trig);
/* select default trigger */
indio_dev->trig = st->trig;
if (ret)
goto error_free_trig_name;
return 0;
error_free_trig_name:
kfree(st->trig->name);
error_free_trig:
iio_free_trigger(st->trig);
return ret;
}
void adis16209_remove_trigger(struct iio_dev *indio_dev)
{
struct adis16209_state *state = indio_dev->dev_data;
iio_trigger_unregister(state->trig);
kfree(state->trig->name);
iio_free_trigger(state->trig);
}
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