crc8.h 548 B

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  1. /* SPDX-License-Identifier: GPL-2.0+ */
  2. /*
  3. * Copyright (c) 2013 Google, Inc
  4. */
  5. #ifndef __linux_crc8_h
  6. #define __linux_crc8_h
  7. /**
  8. * crc8() - Calculate and return CRC-8 of the data
  9. *
  10. * This uses an x^8 + x^2 + x + 1 polynomial. A table-based algorithm would
  11. * be faster, but for only a few bytes it isn't worth the code size
  12. *
  13. * @crc_start: CRC8 start value
  14. * @vptr: Buffer to checksum
  15. * @len: Length of buffer in bytes
  16. * @return CRC8 checksum
  17. */
  18. unsigned int crc8(unsigned int crc_start, const unsigned char *vptr, int len);
  19. #endif