stusb160x.c 960 B

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  1. // SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
  2. /*
  3. * STMicroelectronics STUSB Type-C controller driver
  4. * based on Linux drivers/usb/typec/stusb160x.c
  5. *
  6. * Copyright (C) 2020, STMicroelectronics - All Rights Reserved
  7. */
  8. #include <common.h>
  9. #include <dm.h>
  10. #include <i2c.h>
  11. /* REGISTER */
  12. #define STUSB160X_CC_CONNECTION_STATUS 0x0E
  13. /* STUSB160X_CC_CONNECTION_STATUS bitfields */
  14. #define STUSB160X_CC_ATTACH BIT(0)
  15. int stusb160x_cable_connected(void)
  16. {
  17. struct udevice *dev;
  18. int ret;
  19. ret = uclass_get_device_by_driver(UCLASS_I2C_GENERIC,
  20. DM_DRIVER_GET(stusb160x),
  21. &dev);
  22. if (ret < 0)
  23. return ret;
  24. ret = dm_i2c_reg_read(dev, STUSB160X_CC_CONNECTION_STATUS);
  25. if (ret < 0)
  26. return 0;
  27. return ret & STUSB160X_CC_ATTACH;
  28. }
  29. static const struct udevice_id stusb160x_ids[] = {
  30. { .compatible = "st,stusb1600" },
  31. {}
  32. };
  33. U_BOOT_DRIVER(stusb160x) = {
  34. .name = "stusb160x",
  35. .id = UCLASS_I2C_GENERIC,
  36. .of_match = stusb160x_ids,
  37. };