// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2015 Cogent Embedded, Inc. */ #include <linux/kernel.h> #include <linux/export.h> #include <linux/module.h> #include <linux/iio/iio.h> #include <linux/iio/triggered_event.h> #include <linux/iio/trigger_consumer.h> /** * iio_triggered_event_setup() - Setup pollfunc_event for triggered event * @indio_dev: IIO device structure * @h: Function which will be used as pollfunc_event top half * @thread: Function which will be used as pollfunc_event bottom half * * This function combines some common tasks which will normally be performed * when setting up a triggered event. It will allocate the pollfunc_event and * set mode to use it for triggered event. * * Before calling this function the indio_dev structure should already be * completely initialized, but not yet registered. In practice this means that * this function should be called right before iio_device_register(). * * To free the resources allocated by this function call * iio_triggered_event_cleanup(). */ int iio_triggered_event_setup(struct iio_dev *indio_dev, irqreturn_t (*h)(int irq, void *p), irqreturn_t (*thread)(int irq, void *p)) { indio_dev->pollfunc_event = iio_alloc_pollfunc(h, thread, IRQF_ONESHOT, indio_dev, "%s_consumer%d", indio_dev->name, iio_device_id(indio_dev)); if (indio_dev->pollfunc_event == NULL) return -ENOMEM; /* Flag that events polling is possible */ indio_dev->modes |= INDIO_EVENT_TRIGGERED; return 0; } EXPORT_SYMBOL(iio_triggered_event_setup); /** * iio_triggered_event_cleanup() - Free resources allocated by iio_triggered_event_setup() * @indio_dev: IIO device structure */ void iio_triggered_event_cleanup(struct iio_dev *indio_dev) { indio_dev->modes &= ~INDIO_EVENT_TRIGGERED; iio_dealloc_pollfunc(indio_dev->pollfunc_event); } EXPORT_SYMBOL(iio_triggered_event_cleanup); MODULE_AUTHOR("Vladimir Barinov"); MODULE_DESCRIPTION("IIO helper functions for setting up triggered events"); MODULE_LICENSE("GPL");