blob: 7ddea9b026a969b4207792f1cfe9e39240e7fc48 [file] [log] [blame]
Simon Glassba6c3ce2013-03-11 06:08:00 +00001/*
2 * Copyright (c) 2011 The Chromium OS Authors.
3 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02004 * SPDX-License-Identifier: GPL-2.0+
Simon Glassba6c3ce2013-03-11 06:08:00 +00005 */
6
7#include <common.h>
Simon Glass0efc0242013-12-03 16:43:24 -07008#include <fdtdec.h>
Simon Glassba6c3ce2013-03-11 06:08:00 +00009#include <malloc.h>
10#include <spi.h>
11
Nikita Kiryanov5753d092013-10-16 17:23:25 +030012int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen)
13{
14 if (wordlen == 0 || wordlen > 32) {
15 printf("spi: invalid wordlen %d\n", wordlen);
16 return -1;
17 }
18
19 slave->wordlen = wordlen;
20
21 return 0;
22}
23
Simon Glassba6c3ce2013-03-11 06:08:00 +000024void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
25 unsigned int cs)
26{
27 struct spi_slave *slave;
28 void *ptr;
29
30 ptr = malloc(size);
31 if (ptr) {
32 memset(ptr, '\0', size);
33 slave = (struct spi_slave *)(ptr + offset);
34 slave->bus = bus;
35 slave->cs = cs;
Nikita Kiryanov5753d092013-10-16 17:23:25 +030036 slave->wordlen = SPI_DEFAULT_WORDLEN;
Simon Glassba6c3ce2013-03-11 06:08:00 +000037 }
38
39 return ptr;
40}
Simon Glass0efc0242013-12-03 16:43:24 -070041
42#ifdef CONFIG_OF_SPI
43struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum,
44 int node)
45{
46 int cs, max_hz, mode = 0;
47
48 cs = fdtdec_get_int(blob, node, "reg", -1);
49 max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 100000);
50 if (fdtdec_get_bool(blob, node, "spi-cpol"))
51 mode |= SPI_CPOL;
52 if (fdtdec_get_bool(blob, node, "spi-cpha"))
53 mode |= SPI_CPHA;
54 if (fdtdec_get_bool(blob, node, "spi-cs-high"))
55 mode |= SPI_CS_HIGH;
56 return spi_setup_slave(busnum, cs, max_hz, mode);
57}
58#endif