st_magn_buffer.c 1.5 KB

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  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. #include <linux/module.h>
  10. #include <linux/kernel.h>
  11. #include <linux/slab.h>
  12. #include <linux/stat.h>
  13. #include <linux/interrupt.h>
  14. #include <linux/i2c.h>
  15. #include <linux/delay.h>
  16. #include <linux/iio/iio.h>
  17. #include <linux/iio/buffer.h>
  18. #include <linux/iio/trigger_consumer.h>
  19. #include <linux/iio/triggered_buffer.h>
  20. #include <linux/iio/common/st_sensors.h>
  21. #include "st_magn.h"
  22. int st_magn_trig_set_state(struct iio_trigger *trig, bool state)
  23. {
  24. struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
  25. return st_sensors_set_dataready_irq(indio_dev, state);
  26. }
  27. static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
  28. {
  29. return st_sensors_set_enable(indio_dev, true);
  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. static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {
  36. .postenable = &st_magn_buffer_postenable,
  37. .predisable = &st_magn_buffer_predisable,
  38. };
  39. int st_magn_allocate_ring(struct iio_dev *indio_dev)
  40. {
  41. return iio_triggered_buffer_setup(indio_dev, NULL,
  42. &st_sensors_trigger_handler, &st_magn_buffer_setup_ops);
  43. }
  44. void st_magn_deallocate_ring(struct iio_dev *indio_dev)
  45. {
  46. iio_triggered_buffer_cleanup(indio_dev);
  47. }
  48. MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
  49. MODULE_DESCRIPTION("STMicroelectronics magnetometers buffer");
  50. MODULE_LICENSE("GPL v2");