xref: /openbmc/u-boot/drivers/spi/spi.c (revision 3e3b2b47)
1  // SPDX-License-Identifier: GPL-2.0+
2  /*
3   * Copyright (c) 2011 The Chromium OS Authors.
4   */
5  
6  #include <common.h>
7  #include <fdtdec.h>
8  #include <malloc.h>
9  #include <spi.h>
10  
11  int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen)
12  {
13  	if (wordlen == 0 || wordlen > 32) {
14  		printf("spi: invalid wordlen %u\n", wordlen);
15  		return -1;
16  	}
17  
18  	slave->wordlen = wordlen;
19  
20  	return 0;
21  }
22  
23  void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
24  			 unsigned int cs)
25  {
26  	u8 *ptr;
27  
28  	ptr = malloc(size);
29  	if (ptr) {
30  		struct spi_slave *slave;
31  
32  		memset(ptr, '\0', size);
33  		slave = (struct spi_slave *)(ptr + offset);
34  		slave->bus = bus;
35  		slave->cs = cs;
36  		slave->wordlen = SPI_DEFAULT_WORDLEN;
37  	}
38  
39  	return ptr;
40  }
41