xref: /openbmc/u-boot/lib/tables_csum.c (revision 33b78476)
1  /*
2   * Copyright (C) 2015, Bin Meng <bmeng.cn@gmail.com>
3   *
4   * SPDX-License-Identifier:	GPL-2.0+
5   */
6  
7  #include <common.h>
8  #include <linux/ctype.h>
9  
10  u8 table_compute_checksum(void *v, int len)
11  {
12  	u8 *bytes = v;
13  	u8 checksum = 0;
14  	int i;
15  
16  	for (i = 0; i < len; i++)
17  		checksum -= bytes[i];
18  
19  	return checksum;
20  }
21