1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Common library for ADIS16XXX devices
5 * Copyright 2012 Analog Devices Inc.
6 * Author: Lars-Peter Clausen <lars@metafoo.de>
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>
16 #include <linux/iio/imu/adis.h>
18 static int adis_data_rdy_trigger_set_state(struct iio_trigger *trig,
21 struct adis *adis = iio_trigger_get_drvdata(trig);
23 return adis_enable_irq(adis, state);
26 static const struct iio_trigger_ops adis_trigger_ops = {
27 .set_trigger_state = &adis_data_rdy_trigger_set_state,
30 static int adis_validate_irq_flag(struct adis *adis)
32 unsigned long direction = adis->irq_flag & IRQF_TRIGGER_MASK;
34 * Typically this devices have data ready either on the rising edge or
35 * on the falling edge of the data ready pin. This checks enforces that
36 * one of those is set in the drivers... It defaults to
37 * IRQF_TRIGGER_RISING for backward compatibility with devices that
38 * don't support changing the pin polarity.
40 if (direction == IRQF_TRIGGER_NONE) {
41 adis->irq_flag |= IRQF_TRIGGER_RISING;
43 } else if (direction != IRQF_TRIGGER_RISING &&
44 direction != IRQF_TRIGGER_FALLING) {
45 dev_err(&adis->spi->dev, "Invalid IRQ mask: %08lx\n",
54 * devm_adis_probe_trigger() - Sets up trigger for a managed adis device
55 * @adis: The adis device
56 * @indio_dev: The IIO device
58 * Returns 0 on success or a negative error code
60 int devm_adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
64 adis->trig = devm_iio_trigger_alloc(&adis->spi->dev, "%s-dev%d",
66 iio_device_id(indio_dev));
70 adis->trig->ops = &adis_trigger_ops;
71 iio_trigger_set_drvdata(adis->trig, adis);
73 ret = adis_validate_irq_flag(adis);
77 ret = devm_request_irq(&adis->spi->dev, adis->spi->irq,
78 &iio_trigger_generic_data_rdy_poll,
85 return devm_iio_trigger_register(&adis->spi->dev, adis->trig);
87 EXPORT_SYMBOL_GPL(devm_adis_probe_trigger);