usb_onboard_hub.c 1.4 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /*
  3. * Driver for onboard USB hubs
  4. *
  5. * Copyright (C) 2022, STMicroelectronics - All Rights Reserved
  6. *
  7. * Mostly inspired by Linux kernel v6.1 onboard_usb_hub driver
  8. */
  9. #include <common.h>
  10. #include <dm.h>
  11. #include <dm/device_compat.h>
  12. #include <power/regulator.h>
  13. struct onboard_hub {
  14. struct udevice *vdd;
  15. };
  16. static int usb_onboard_hub_probe(struct udevice *dev)
  17. {
  18. struct onboard_hub *hub = dev_get_priv(dev);
  19. int ret;
  20. ret = device_get_supply_regulator(dev, "vdd-supply", &hub->vdd);
  21. if (ret) {
  22. dev_err(dev, "can't get vdd-supply: %d\n", ret);
  23. return ret;
  24. }
  25. ret = regulator_set_enable_if_allowed(hub->vdd, true);
  26. if (ret)
  27. dev_err(dev, "can't enable vdd-supply: %d\n", ret);
  28. return ret;
  29. }
  30. static int usb_onboard_hub_remove(struct udevice *dev)
  31. {
  32. struct onboard_hub *hub = dev_get_priv(dev);
  33. int ret;
  34. ret = regulator_set_enable_if_allowed(hub->vdd, false);
  35. if (ret)
  36. dev_err(dev, "can't disable vdd-supply: %d\n", ret);
  37. return ret;
  38. }
  39. static const struct udevice_id usb_onboard_hub_ids[] = {
  40. /* Use generic usbVID,PID dt-bindings (usb-device.yaml) */
  41. { .compatible = "usb424,2514" }, /* USB2514B USB 2.0 */
  42. { }
  43. };
  44. U_BOOT_DRIVER(usb_onboard_hub) = {
  45. .name = "usb_onboard_hub",
  46. .id = UCLASS_USB_HUB,
  47. .probe = usb_onboard_hub_probe,
  48. .remove = usb_onboard_hub_remove,
  49. .of_match = usb_onboard_hub_ids,
  50. .priv_auto = sizeof(struct onboard_hub),
  51. };