dvb-usb-i2c.c 1018 B

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  1. /* dvb-usb-i2c.c is part of the DVB USB library.
  2. *
  3. * Copyright (C) 2004-6 Patrick Boettcher (patrick.boettcher@desy.de)
  4. * see dvb-usb-init.c for copyright information.
  5. *
  6. * This file contains functions for (de-)initializing an I2C adapter.
  7. */
  8. #include "dvb-usb-common.h"
  9. int dvb_usb_i2c_init(struct dvb_usb_device *d)
  10. {
  11. int ret = 0;
  12. if (!(d->props.caps & DVB_USB_IS_AN_I2C_ADAPTER))
  13. return 0;
  14. if (d->props.i2c_algo == NULL) {
  15. err("no i2c algorithm specified");
  16. return -EINVAL;
  17. }
  18. strlcpy(d->i2c_adap.name, d->desc->name, sizeof(d->i2c_adap.name));
  19. d->i2c_adap.algo = d->props.i2c_algo;
  20. d->i2c_adap.algo_data = NULL;
  21. d->i2c_adap.dev.parent = &d->udev->dev;
  22. i2c_set_adapdata(&d->i2c_adap, d);
  23. if ((ret = i2c_add_adapter(&d->i2c_adap)) < 0)
  24. err("could not add i2c adapter");
  25. d->state |= DVB_USB_STATE_I2C;
  26. return ret;
  27. }
  28. int dvb_usb_i2c_exit(struct dvb_usb_device *d)
  29. {
  30. if (d->state & DVB_USB_STATE_I2C)
  31. i2c_del_adapter(&d->i2c_adap);
  32. d->state &= ~DVB_USB_STATE_I2C;
  33. return 0;
  34. }