serial_nulldev.c 976 B

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  1. /*
  2. * Copyright (c) 2015 National Instruments
  3. *
  4. * SPDX-License-Identifier: GPL-2.0+
  5. */
  6. #include <common.h>
  7. #include <dm.h>
  8. #include <serial.h>
  9. static int nulldev_serial_setbrg(struct udevice *dev, int baudrate)
  10. {
  11. return 0;
  12. }
  13. static int nulldev_serial_getc(struct udevice *dev)
  14. {
  15. return -EAGAIN;
  16. }
  17. static int nulldev_serial_pending(struct udevice *dev, bool input)
  18. {
  19. return 0;
  20. }
  21. static int nulldev_serial_input(struct udevice *dev)
  22. {
  23. return 0;
  24. }
  25. static int nulldev_serial_putc(struct udevice *dev, const char ch)
  26. {
  27. return 0;
  28. }
  29. static const struct udevice_id nulldev_serial_ids[] = {
  30. { .compatible = "nulldev-serial" },
  31. { }
  32. };
  33. const struct dm_serial_ops nulldev_serial_ops = {
  34. .putc = nulldev_serial_putc,
  35. .pending = nulldev_serial_pending,
  36. .getc = nulldev_serial_getc,
  37. .setbrg = nulldev_serial_setbrg,
  38. };
  39. U_BOOT_DRIVER(serial_nulldev) = {
  40. .name = "serial_nulldev",
  41. .id = UCLASS_SERIAL,
  42. .of_match = nulldev_serial_ids,
  43. .ops = &nulldev_serial_ops,
  44. };