89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
/*
|
|
* Common library for ADIS16XXX devices
|
|
*
|
|
* Copyright 2012 Analog Devices Inc.
|
|
* Author: Lars-Peter Clausen <lars@metafoo.de>
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <linux/interrupt.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/spi/spi.h>
|
|
#include <linux/export.h>
|
|
|
|
#include <linux/iio/iio.h>
|
|
#include <linux/iio/trigger.h>
|
|
#include <linux/iio/imu/adis.h>
|
|
|
|
static int adis_data_rdy_trigger_set_state(struct iio_trigger *trig,
|
|
bool state)
|
|
{
|
|
struct adis *adis = iio_trigger_get_drvdata(trig);
|
|
|
|
return adis_enable_irq(adis, state);
|
|
}
|
|
|
|
static const struct iio_trigger_ops adis_trigger_ops = {
|
|
.set_trigger_state = &adis_data_rdy_trigger_set_state,
|
|
};
|
|
|
|
/**
|
|
* adis_probe_trigger() - Sets up trigger for a adis device
|
|
* @adis: The adis device
|
|
* @indio_dev: The IIO device
|
|
*
|
|
* Returns 0 on success or a negative error code
|
|
*
|
|
* adis_remove_trigger() should be used to free the trigger.
|
|
*/
|
|
int adis_probe_trigger(struct adis *adis, struct iio_dev *indio_dev)
|
|
{
|
|
int ret;
|
|
|
|
adis->trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
|
|
indio_dev->id);
|
|
if (adis->trig == NULL)
|
|
return -ENOMEM;
|
|
|
|
ret = request_irq(adis->spi->irq,
|
|
&iio_trigger_generic_data_rdy_poll,
|
|
IRQF_TRIGGER_RISING,
|
|
indio_dev->name,
|
|
adis->trig);
|
|
if (ret)
|
|
goto error_free_trig;
|
|
|
|
adis->trig->dev.parent = &adis->spi->dev;
|
|
adis->trig->ops = &adis_trigger_ops;
|
|
iio_trigger_set_drvdata(adis->trig, adis);
|
|
ret = iio_trigger_register(adis->trig);
|
|
|
|
indio_dev->trig = iio_trigger_get(adis->trig);
|
|
if (ret)
|
|
goto error_free_irq;
|
|
|
|
return 0;
|
|
|
|
error_free_irq:
|
|
free_irq(adis->spi->irq, adis->trig);
|
|
error_free_trig:
|
|
iio_trigger_free(adis->trig);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(adis_probe_trigger);
|
|
|
|
/**
|
|
* adis_remove_trigger() - Remove trigger for a adis devices
|
|
* @adis: The adis device
|
|
*
|
|
* Removes the trigger previously registered with adis_probe_trigger().
|
|
*/
|
|
void adis_remove_trigger(struct adis *adis)
|
|
{
|
|
iio_trigger_unregister(adis->trig);
|
|
free_irq(adis->spi->irq, adis->trig);
|
|
iio_trigger_free(adis->trig);
|
|
}
|
|
EXPORT_SYMBOL_GPL(adis_remove_trigger);
|