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a574e68ff5
The st_gyro_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_gyro_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_gyro_allocate_ring() as well. Signed-off-by: Alexandru Ardelean <aardelean@deviqon.com> Link: https://lore.kernel.org/r/20210720074642.223293-4-aardelean@deviqon.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* STMicroelectronics gyroscopes driver
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*
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* Copyright 2012-2013 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_gyro.h"
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int st_gyro_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_gyro_buffer_postenable(struct iio_dev *indio_dev)
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{
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int err;
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err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
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if (err < 0)
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return err;
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err = st_sensors_set_enable(indio_dev, true);
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if (err < 0)
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goto st_gyro_buffer_enable_all_axis;
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return 0;
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st_gyro_buffer_enable_all_axis:
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st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
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return err;
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}
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static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)
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{
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int err;
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err = st_sensors_set_enable(indio_dev, false);
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if (err < 0)
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return err;
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return st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
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}
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static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {
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.postenable = &st_gyro_buffer_postenable,
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.predisable = &st_gyro_buffer_predisable,
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};
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int st_gyro_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_gyro_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 gyroscopes buffer");
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MODULE_LICENSE("GPL v2");
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