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