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