cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

st_gyro_buffer.c (1587B)

      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * STMicroelectronics gyroscopes driver
      4 *
      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