1 #include <linux/interrupt.h>
3 #include <linux/mutex.h>
4 #include <linux/device.h>
5 #include <linux/kernel.h>
6 #include <linux/sysfs.h>
7 #include <linux/list.h>
8 #include <linux/spi/spi.h>
12 #include "../trigger.h"
16 * ade7758_data_rdy_trig_poll() the event handler for the data rdy trig
18 static int ade7758_data_rdy_trig_poll(struct iio_dev *dev_info,
23 struct ade7758_state *st = iio_dev_get_devdata(dev_info);
24 struct iio_trigger *trig = st->trig;
26 iio_trigger_poll(trig, timestamp);
31 IIO_EVENT_SH(data_rdy_trig, &ade7758_data_rdy_trig_poll);
33 static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
35 static struct attribute *ade7758_trigger_attrs[] = {
40 static const struct attribute_group ade7758_trigger_attr_group = {
41 .attrs = ade7758_trigger_attrs,
45 * ade7758_data_rdy_trigger_set_state() set datardy interrupt state
47 static int ade7758_data_rdy_trigger_set_state(struct iio_trigger *trig,
50 struct ade7758_state *st = trig->private_data;
51 struct iio_dev *indio_dev = st->indio_dev;
54 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
55 ret = ade7758_set_irq(&st->indio_dev->dev, state);
57 iio_remove_event_from_list(&iio_event_data_rdy_trig,
58 &indio_dev->interrupts[0]
60 /* possible quirk with handler currently worked around
61 by ensuring the work queue is empty */
62 flush_scheduled_work();
64 iio_add_event_to_list(&iio_event_data_rdy_trig,
65 &indio_dev->interrupts[0]->ev_list);
71 * ade7758_trig_try_reen() try renabling irq for data rdy trigger
72 * @trig: the datardy trigger
74 static int ade7758_trig_try_reen(struct iio_trigger *trig)
76 struct ade7758_state *st = trig->private_data;
77 enable_irq(st->us->irq);
78 /* irq reenabled so success! */
82 int ade7758_probe_trigger(struct iio_dev *indio_dev)
85 struct ade7758_state *st = indio_dev->dev_data;
87 st->trig = iio_allocate_trigger();
88 st->trig->name = kasprintf(GFP_KERNEL,
91 if (!st->trig->name) {
95 st->trig->dev.parent = &st->us->dev;
96 st->trig->owner = THIS_MODULE;
97 st->trig->private_data = st;
98 st->trig->set_trigger_state = &ade7758_data_rdy_trigger_set_state;
99 st->trig->try_reenable = &ade7758_trig_try_reen;
100 st->trig->control_attrs = &ade7758_trigger_attr_group;
101 ret = iio_trigger_register(st->trig);
103 /* select default trigger */
104 indio_dev->trig = st->trig;
106 goto error_free_trig_name;
110 error_free_trig_name:
111 kfree(st->trig->name);
113 iio_free_trigger(st->trig);
118 void ade7758_remove_trigger(struct iio_dev *indio_dev)
120 struct ade7758_state *state = indio_dev->dev_data;
122 iio_trigger_unregister(state->trig);
123 kfree(state->trig->name);
124 iio_free_trigger(state->trig);