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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (c) 2013 Google, Inc
- */
- #include "linux/crc8.h"
- #define POLY (0x1070U << 3)
- static unsigned char _crc8(unsigned short data)
- {
- int i;
- for (i = 0; i < 8; i++) {
- if (data & 0x8000)
- data = data ^ POLY;
- data = data << 1;
- }
- return (unsigned char)(data >> 8);
- }
- unsigned int crc8(unsigned int crc, const unsigned char *vptr, int len)
- {
- int i;
- for (i = 0; i < len; i++)
- crc = _crc8((crc ^ vptr[i]) << 8);
- return crc;
- }
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