1 #include <linux/interrupt.h>
2 #include <linux/kernel.h>
3 #include <linux/spi/spi.h>
4 #include <linux/export.h>
5
6 #include "../iio.h"
7 #include "../trigger.h"
8 #include "adis16400.h"
9
10 /**
11 * adis16400_data_rdy_trigger_set_state() set datardy interrupt state
12 **/
adis16400_data_rdy_trigger_set_state(struct iio_trigger * trig,bool state)13 static int adis16400_data_rdy_trigger_set_state(struct iio_trigger *trig,
14 bool state)
15 {
16 struct iio_dev *indio_dev = trig->private_data;
17
18 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
19 return adis16400_set_irq(indio_dev, state);
20 }
21
22 static const struct iio_trigger_ops adis16400_trigger_ops = {
23 .owner = THIS_MODULE,
24 .set_trigger_state = &adis16400_data_rdy_trigger_set_state,
25 };
26
adis16400_probe_trigger(struct iio_dev * indio_dev)27 int adis16400_probe_trigger(struct iio_dev *indio_dev)
28 {
29 int ret;
30 struct adis16400_state *st = iio_priv(indio_dev);
31
32 st->trig = iio_allocate_trigger("%s-dev%d",
33 indio_dev->name,
34 indio_dev->id);
35 if (st->trig == NULL) {
36 ret = -ENOMEM;
37 goto error_ret;
38 }
39
40 ret = request_irq(st->us->irq,
41 &iio_trigger_generic_data_rdy_poll,
42 IRQF_TRIGGER_RISING,
43 "adis16400",
44 st->trig);
45 if (ret)
46 goto error_free_trig;
47 st->trig->dev.parent = &st->us->dev;
48 st->trig->private_data = indio_dev;
49 st->trig->ops = &adis16400_trigger_ops;
50 ret = iio_trigger_register(st->trig);
51
52 /* select default trigger */
53 indio_dev->trig = st->trig;
54 if (ret)
55 goto error_free_irq;
56
57 return 0;
58
59 error_free_irq:
60 free_irq(st->us->irq, st->trig);
61 error_free_trig:
62 iio_free_trigger(st->trig);
63 error_ret:
64 return ret;
65 }
66
adis16400_remove_trigger(struct iio_dev * indio_dev)67 void adis16400_remove_trigger(struct iio_dev *indio_dev)
68 {
69 struct adis16400_state *st = iio_priv(indio_dev);
70
71 iio_trigger_unregister(st->trig);
72 free_irq(st->us->irq, st->trig);
73 iio_free_trigger(st->trig);
74 }
75