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/kernel.h>
11 #include <linux/spi/spi.h>
12 #include <linux/export.h>
14 #include <linux/iio/iio.h>
15 #include <linux/iio/trigger.h>
19 * ade7758_data_rdy_trig_poll() the event handler for the data rdy trig
21 static irqreturn_t ade7758_data_rdy_trig_poll(int irq, void *private)
23 disable_irq_nosync(irq);
24 iio_trigger_poll(private);
30 * ade7758_data_rdy_trigger_set_state() set datardy interrupt state
32 static int ade7758_data_rdy_trigger_set_state(struct iio_trigger *trig,
35 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
37 dev_dbg(&indio_dev->dev, "%s (%d)\n", __func__, state);
38 return ade7758_set_irq(&indio_dev->dev, state);
42 * ade7758_trig_try_reen() try renabling irq for data rdy trigger
43 * @trig: the datardy trigger
45 static int ade7758_trig_try_reen(struct iio_trigger *trig)
47 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
48 struct ade7758_state *st = iio_priv(indio_dev);
50 enable_irq(st->us->irq);
51 /* irq reenabled so success! */
55 static const struct iio_trigger_ops ade7758_trigger_ops = {
57 .set_trigger_state = &ade7758_data_rdy_trigger_set_state,
58 .try_reenable = &ade7758_trig_try_reen,
61 int ade7758_probe_trigger(struct iio_dev *indio_dev)
63 struct ade7758_state *st = iio_priv(indio_dev);
66 st->trig = iio_trigger_alloc("%s-dev%d",
67 spi_get_device_id(st->us)->name,
74 ret = request_irq(st->us->irq,
75 ade7758_data_rdy_trig_poll,
77 spi_get_device_id(st->us)->name,
82 st->trig->dev.parent = &st->us->dev;
83 st->trig->ops = &ade7758_trigger_ops;
84 iio_trigger_set_drvdata(st->trig, indio_dev);
85 ret = iio_trigger_register(st->trig);
87 /* select default trigger */
88 indio_dev->trig = iio_trigger_get(st->trig);
95 free_irq(st->us->irq, st->trig);
97 iio_trigger_free(st->trig);
102 void ade7758_remove_trigger(struct iio_dev *indio_dev)
104 struct ade7758_state *st = iio_priv(indio_dev);
106 iio_trigger_unregister(st->trig);
107 free_irq(st->us->irq, st->trig);
108 iio_trigger_free(st->trig);