sd_adc_modulator.c 1.5 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Generic sigma delta modulator driver
  4. *
  5. * Copyright (C) 2017, STMicroelectronics - All Rights Reserved
  6. * Author: Arnaud Pouliquen <arnaud.pouliquen@st.com>.
  7. */
  8. #include <linux/iio/iio.h>
  9. #include <linux/iio/triggered_buffer.h>
  10. #include <linux/module.h>
  11. #include <linux/mod_devicetable.h>
  12. #include <linux/platform_device.h>
  13. static const struct iio_info iio_sd_mod_iio_info;
  14. static const struct iio_chan_spec iio_sd_mod_ch = {
  15. .type = IIO_VOLTAGE,
  16. .indexed = 1,
  17. .scan_type = {
  18. .sign = 'u',
  19. .realbits = 1,
  20. .shift = 0,
  21. },
  22. };
  23. static int iio_sd_mod_probe(struct platform_device *pdev)
  24. {
  25. struct device *dev = &pdev->dev;
  26. struct iio_dev *iio;
  27. iio = devm_iio_device_alloc(dev, 0);
  28. if (!iio)
  29. return -ENOMEM;
  30. iio->name = dev_name(dev);
  31. iio->info = &iio_sd_mod_iio_info;
  32. iio->modes = INDIO_BUFFER_HARDWARE;
  33. iio->num_channels = 1;
  34. iio->channels = &iio_sd_mod_ch;
  35. platform_set_drvdata(pdev, iio);
  36. return devm_iio_device_register(&pdev->dev, iio);
  37. }
  38. static const struct of_device_id sd_adc_of_match[] = {
  39. { .compatible = "sd-modulator" },
  40. { .compatible = "ads1201" },
  41. { }
  42. };
  43. MODULE_DEVICE_TABLE(of, sd_adc_of_match);
  44. static struct platform_driver iio_sd_mod_adc = {
  45. .driver = {
  46. .name = "iio_sd_adc_mod",
  47. .of_match_table = sd_adc_of_match,
  48. },
  49. .probe = iio_sd_mod_probe,
  50. };
  51. module_platform_driver(iio_sd_mod_adc);
  52. MODULE_DESCRIPTION("Basic sigma delta modulator");
  53. MODULE_AUTHOR("Arnaud Pouliquen <arnaud.pouliquen@st.com>");
  54. MODULE_LICENSE("GPL v2");