1 /* 2 * Copyright (c) 2013 Google, Inc 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 8 #ifndef __linux_crc8_h 9 #define __linux_crc8_h 10 11 /** 12 * crc8() - Calculate and return CRC-8 of the data 13 * 14 * This uses an x^8 + x^2 + x + 1 polynomial. A table-based algorithm would 15 * be faster, but for only a few bytes it isn't worth the code size 16 * 17 * @crc_start: CRC8 start value 18 * @vptr: Buffer to checksum 19 * @len: Length of buffer in bytes 20 * @return CRC8 checksum 21 */ 22 unsigned int crc8(unsigned int crc_start, const unsigned char *vptr, int len); 23 24 #endif 25