// SPDX-License-Identifier: GPL-2.0-or-later /* * Common library for ADIS16XXX devices * * Copyright 2012 Analog Devices Inc. * Author: Lars-Peter Clausen <lars@metafoo.de> */ #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; adis->trig->dev.parent = &adis->spi->dev; adis->trig->ops = &adis_trigger_ops; iio_trigger_set_drvdata(adis->trig, adis); 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; 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);