674db1e921
The st_press_allocate_ring() function calls iio_triggered_buffer_setup() to allocate a triggered buffer. But the same can be done with devm_iio_triggered_buffer_setup() and then the st_press_common_remove() no longer needs to manually deallocate it. We know that the parent of the IIO device is used to manage other instances of the devm unwind, so it can be used in the st_press_allocate_ring() as well. Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com> Link: https://lore.kernel.org/r/20210720074642.223293-1-aardelean@deviqon.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
51 lines
1.3 KiB
C
51 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* STMicroelectronics pressures driver
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*
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* Copyright 2013 STMicroelectronics Inc.
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*
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* Denis Ciocca <denis.ciocca@st.com>
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/buffer.h>
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#include <linux/iio/trigger.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/iio/common/st_sensors.h>
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#include "st_pressure.h"
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int st_press_trig_set_state(struct iio_trigger *trig, bool state)
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{
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struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
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return st_sensors_set_dataready_irq(indio_dev, state);
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}
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static int st_press_buffer_postenable(struct iio_dev *indio_dev)
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{
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return st_sensors_set_enable(indio_dev, true);
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}
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static int st_press_buffer_predisable(struct iio_dev *indio_dev)
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{
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return st_sensors_set_enable(indio_dev, false);
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}
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static const struct iio_buffer_setup_ops st_press_buffer_setup_ops = {
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.postenable = &st_press_buffer_postenable,
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.predisable = &st_press_buffer_predisable,
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};
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int st_press_allocate_ring(struct iio_dev *indio_dev)
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{
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return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
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NULL, &st_sensors_trigger_handler, &st_press_buffer_setup_ops);
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}
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MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics pressures buffer");
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MODULE_LICENSE("GPL v2");
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