2 * ADE7758 Poly Phase Multifunction Energy Metering IC driver
4 * Copyright 2010-2011 Analog Devices Inc.
6 * Licensed under the GPL-2.
9 #include <linux/interrupt.h>
10 #include <linux/irq.h>
11 #include <linux/mutex.h>
12 #include <linux/device.h>
13 #include <linux/kernel.h>
14 #include <linux/sysfs.h>
15 #include <linux/list.h>
16 #include <linux/spi/spi.h>
20 #include "../trigger.h"
24 * ade7758_data_rdy_trig_poll() the event handler for the data rdy trig
26 static irqreturn_t ade7758_data_rdy_trig_poll(int irq, void *private)
28 disable_irq_nosync(irq);
29 iio_trigger_poll(private, iio_get_time_ns());
35 * ade7758_data_rdy_trigger_set_state() set datardy interrupt state
37 static int ade7758_data_rdy_trigger_set_state(struct iio_trigger *trig,
40 struct iio_dev *indio_dev = trig->private_data;
42 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
43 return ade7758_set_irq(&indio_dev->dev, state);
47 * ade7758_trig_try_reen() try renabling irq for data rdy trigger
48 * @trig: the datardy trigger
50 static int ade7758_trig_try_reen(struct iio_trigger *trig)
52 struct iio_dev *indio_dev = trig->private_data;
53 struct ade7758_state *st = iio_priv(indio_dev);
55 enable_irq(st->us->irq);
56 /* irq reenabled so success! */
60 int ade7758_probe_trigger(struct iio_dev *indio_dev)
62 struct ade7758_state *st = iio_priv(indio_dev);
65 st->trig = iio_allocate_trigger("%s-dev%d",
66 spi_get_device_id(st->us)->name,
68 if (st->trig == NULL) {
73 ret = request_irq(st->us->irq,
74 ade7758_data_rdy_trig_poll,
76 spi_get_device_id(st->us)->name,
81 st->trig->dev.parent = &st->us->dev;
82 st->trig->owner = THIS_MODULE;
83 st->trig->private_data = indio_dev;
84 st->trig->set_trigger_state = &ade7758_data_rdy_trigger_set_state;
85 st->trig->try_reenable = &ade7758_trig_try_reen;
86 ret = iio_trigger_register(st->trig);
88 /* select default trigger */
89 indio_dev->trig = st->trig;
96 free_irq(st->us->irq, st->trig);
98 iio_free_trigger(st->trig);
103 void ade7758_remove_trigger(struct iio_dev *indio_dev)
105 struct ade7758_state *st = iio_priv(indio_dev);
107 iio_trigger_unregister(st->trig);
108 free_irq(st->us->irq, st->trig);
109 iio_free_trigger(st->trig);