67 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * STMicroelectronics gyroscopes driver4 *5 * Copyright 2012-2013 STMicroelectronics Inc.6 *7 * Denis Ciocca <denis.ciocca@st.com>8 */9 10#include <linux/kernel.h>11#include <linux/iio/iio.h>12#include <linux/iio/buffer.h>13#include <linux/iio/trigger.h>14#include <linux/iio/triggered_buffer.h>15 16#include <linux/iio/common/st_sensors.h>17#include "st_gyro.h"18 19int st_gyro_trig_set_state(struct iio_trigger *trig, bool state)20{21 struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);22 23 return st_sensors_set_dataready_irq(indio_dev, state);24}25 26static int st_gyro_buffer_postenable(struct iio_dev *indio_dev)27{28 int err;29 30 err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);31 if (err < 0)32 return err;33 34 err = st_sensors_set_enable(indio_dev, true);35 if (err < 0)36 goto st_gyro_buffer_enable_all_axis;37 38 return 0;39 40st_gyro_buffer_enable_all_axis:41 st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);42 return err;43}44 45static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)46{47 int err;48 49 err = st_sensors_set_enable(indio_dev, false);50 if (err < 0)51 return err;52 53 return st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);54}55 56static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {57 .postenable = &st_gyro_buffer_postenable,58 .predisable = &st_gyro_buffer_predisable,59};60 61int st_gyro_allocate_ring(struct iio_dev *indio_dev)62{63 return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,64 NULL, &st_sensors_trigger_handler, &st_gyro_buffer_setup_ops);65}66 67