LXR linux/drivers/iio/magnetometer/st_magn

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * STMicroelectronics magnetometers driver
   4 *
   5 * Copyright 2012-2013 STMicroelectronics Inc.
   6 *
   7 * Denis Ciocca <denis.ciocca@st.com>
   8 */
   9
  10#include <linux/module.h>
  11#include <linux/kernel.h>
  12#include <linux/iio/iio.h>
  13#include <linux/iio/buffer.h>
  14#include <linux/iio/trigger.h>
  15#include <linux/iio/triggered_buffer.h>
  16
  17#include <linux/iio/common/st_sensors.h>
  18#include "st_magn.h"
  19
  20int st_magn_trig_set_state(struct iio_trigger *trig, bool state)
  21{
  22        struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
  23
  24        return st_sensors_set_dataready_irq(indio_dev, state);
  25}
  26
  27static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
  28{
  29        return st_sensors_set_enable(indio_dev, true);
  30}
  31
  32static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
  33{
  34        return st_sensors_set_enable(indio_dev, false);
  35}
  36
  37static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {
  38        .postenable = &st_magn_buffer_postenable,
  39        .predisable = &st_magn_buffer_predisable,
  40};
  41
  42int st_magn_allocate_ring(struct iio_dev *indio_dev)
  43{
  44        return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
  45                NULL, &st_sensors_trigger_handler, &st_magn_buffer_setup_ops);
  46}
  47
  48MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  49MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer");
  50MODULE_LICENSE("GPL v2");
  51