xref: /openbmc/u-boot/drivers/spi/spi.c (revision e23b19f4)
1 /*
2  * Copyright (c) 2011 The Chromium OS Authors.
3  *
4  * SPDX-License-Identifier:	GPL-2.0+
5  */
6 
7 #include <common.h>
8 #include <fdtdec.h>
9 #include <malloc.h>
10 #include <spi.h>
11 
12 int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen)
13 {
14 	if (wordlen == 0 || wordlen > 32) {
15 		printf("spi: invalid wordlen %u\n", wordlen);
16 		return -1;
17 	}
18 
19 	slave->wordlen = wordlen;
20 
21 	return 0;
22 }
23 
24 void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
25 			 unsigned int cs)
26 {
27 	u8 *ptr;
28 
29 	ptr = malloc(size);
30 	if (ptr) {
31 		struct spi_slave *slave;
32 
33 		memset(ptr, '\0', size);
34 		slave = (struct spi_slave *)(ptr + offset);
35 		slave->bus = bus;
36 		slave->cs = cs;
37 		slave->wordlen = SPI_DEFAULT_WORDLEN;
38 	}
39 
40 	return ptr;
41 }
42