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