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// SPDX-License-Identifier: GPL-2.0-only
/*
* STMicroelectronics gyroscopes driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/iio/iio.h>
#include <linux/iio/buffer.h>
#include <linux/iio/trigger.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/iio/common/st_sensors.h>
#include "st_gyro.h"
int st_gyro_trig_set_state(struct iio_trigger *trig, bool state)
{
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
return st_sensors_set_dataready_irq(indio_dev, state);
}
static int st_gyro_buffer_postenable(struct iio_dev *indio_dev)
{
int err;
err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
if (err < 0)
return err;
err = st_sensors_set_enable(indio_dev, true);
if (err < 0)
goto st_gyro_buffer_enable_all_axis;
return 0;
st_gyro_buffer_enable_all_axis:
st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
return err;
}
static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)
{
int err;
err = st_sensors_set_enable(indio_dev, false);
if (err < 0)
return err;
return st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
}
static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {
.postenable = &st_gyro_buffer_postenable,
.predisable = &st_gyro_buffer_predisable,
};
int st_gyro_allocate_ring(struct iio_dev *indio_dev)
{
return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
NULL, &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops);
}
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics gyroscopes buffer");
MODULE_LICENSE("GPL v2");
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