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15ea2878bf
Continuing from Alexandru Ardelean's introduction of the split between driver modifiable fields and those that should only be set by the core. This could have been done in two steps to make the actual move after introducing iio_device_id() but there seemed limited point to that given how mechanical the majority of the patch is. Includes fixup from Alex for missing mxs-lradc-adc conversion. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Reviewed-by: Alexandru Ardelean <ardeleanalex@gmail.com> Link: https://lore.kernel.org/r/20210426174911.397061-2-jic23@kernel.org
64 lines
2.1 KiB
C
64 lines
2.1 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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iio_device_id(indio_dev));
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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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