2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
65 lines
2.0 KiB
C
65 lines
2.0 KiB
C
// 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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