drivers/iio/magnetometer/st_magn_buffer.c

   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/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_magn.h"
  18
  19 int st_magn_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
  26 static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
  27 {
  28         return st_sensors_set_enable(indio_dev, true);
  29 }
  30
  31 static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
  32 {
  33         return st_sensors_set_enable(indio_dev, false);
  34 }
  35
  36 static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {
  37         .postenable = &st_magn_buffer_postenable,
  38         .predisable = &st_magn_buffer_predisable,
  39 };
  40
  41 int st_magn_allocate_ring(struct iio_dev *indio_dev)
  42 {
  43         return devm_iio_triggered_buffer_setup(indio_dev->dev.parent, indio_dev,
  44                 NULL, &st_sensors_trigger_handler, &st_magn_buffer_setup_ops);
  45 }
  46