tegra186-reset.c 1.8 KB

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  1. // SPDX-License-Identifier: GPL-2.0
  2. /*
  3. * Copyright (c) 2016, NVIDIA CORPORATION.
  4. */
  5. #include <common.h>
  6. #include <dm.h>
  7. #include <log.h>
  8. #include <malloc.h>
  9. #include <misc.h>
  10. #include <reset-uclass.h>
  11. #include <asm/arch-tegra/bpmp_abi.h>
  12. static int tegra186_reset_request(struct reset_ctl *reset_ctl)
  13. {
  14. debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
  15. reset_ctl->dev, reset_ctl->id);
  16. return 0;
  17. }
  18. static int tegra186_reset_free(struct reset_ctl *reset_ctl)
  19. {
  20. debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
  21. reset_ctl->dev, reset_ctl->id);
  22. return 0;
  23. }
  24. static int tegra186_reset_common(struct reset_ctl *reset_ctl,
  25. enum mrq_reset_commands cmd)
  26. {
  27. struct mrq_reset_request req;
  28. int ret;
  29. req.cmd = cmd;
  30. req.reset_id = reset_ctl->id;
  31. ret = misc_call(reset_ctl->dev->parent, MRQ_RESET, &req, sizeof(req),
  32. NULL, 0);
  33. if (ret < 0)
  34. return ret;
  35. return 0;
  36. }
  37. static int tegra186_reset_assert(struct reset_ctl *reset_ctl)
  38. {
  39. debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
  40. reset_ctl->dev, reset_ctl->id);
  41. return tegra186_reset_common(reset_ctl, CMD_RESET_ASSERT);
  42. }
  43. static int tegra186_reset_deassert(struct reset_ctl *reset_ctl)
  44. {
  45. debug("%s(reset_ctl=%p) (dev=%p, id=%lu)\n", __func__, reset_ctl,
  46. reset_ctl->dev, reset_ctl->id);
  47. return tegra186_reset_common(reset_ctl, CMD_RESET_DEASSERT);
  48. }
  49. struct reset_ops tegra186_reset_ops = {
  50. .request = tegra186_reset_request,
  51. .rfree = tegra186_reset_free,
  52. .rst_assert = tegra186_reset_assert,
  53. .rst_deassert = tegra186_reset_deassert,
  54. };
  55. static int tegra186_reset_probe(struct udevice *dev)
  56. {
  57. debug("%s(dev=%p)\n", __func__, dev);
  58. return 0;
  59. }
  60. U_BOOT_DRIVER(tegra186_reset) = {
  61. .name = "tegra186_reset",
  62. .id = UCLASS_RESET,
  63. .probe = tegra186_reset_probe,
  64. .ops = &tegra186_reset_ops,
  65. };