drivers/iio/pressure/st_pressure_buffer.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * STMicroelectronics pressures driver
   4  *
   5  * Copyright 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/slab.h>
  13 #include <linux/stat.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/i2c.h>
  16 #include <linux/delay.h>
  17 #include <linux/iio/iio.h>
  18 #include <linux/iio/buffer.h>
  19 #include <linux/iio/trigger_consumer.h>
  20 #include <linux/iio/triggered_buffer.h>
  21
  22 #include <linux/iio/common/st_sensors.h>
  23 #include "st_pressure.h"
  24
  25 int st_press_trig_set_state(struct iio_trigger *trig, bool state)
  26 {
  27         struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
  28
  29         return st_sensors_set_dataready_irq(indio_dev, state);
  30 }
  31
  32 static int st_press_buffer_postenable(struct iio_dev *indio_dev)
  33 {
  34         return st_sensors_set_enable(indio_dev, true);
  35 }
  36
  37 static int st_press_buffer_predisable(struct iio_dev *indio_dev)
  38 {
  39         return st_sensors_set_enable(indio_dev, false);
  40 }
  41
  42 static const struct iio_buffer_setup_ops st_press_buffer_setup_ops = {
  43         .postenable = &st_press_buffer_postenable,
  44         .predisable = &st_press_buffer_predisable,
  45 };
  46
  47 int st_press_allocate_ring(struct iio_dev *indio_dev)
  48 {
  49         return iio_triggered_buffer_setup(indio_dev, NULL,
  50                 &st_sensors_trigger_handler, &st_press_buffer_setup_ops);
  51 }
  52
  53 void st_press_deallocate_ring(struct iio_dev *indio_dev)
  54 {
  55         iio_triggered_buffer_cleanup(indio_dev);
  56 }
  57
  58 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  59 MODULE_DESCRIPTION("STMicroelectronics pressures buffer");
  60 MODULE_LICENSE("GPL v2");