1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
/*
* Copyright (c) 2011 The Chromium OS Authors.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fdtdec.h>
#include <malloc.h>
#include <spi.h>
int spi_set_wordlen(struct spi_slave *slave, unsigned int wordlen)
{
if (wordlen == 0 || wordlen > 32) {
printf("spi: invalid wordlen %d\n", wordlen);
return -1;
}
slave->wordlen = wordlen;
return 0;
}
void *spi_do_alloc_slave(int offset, int size, unsigned int bus,
unsigned int cs)
{
struct spi_slave *slave;
void *ptr;
ptr = malloc(size);
if (ptr) {
memset(ptr, '\0', size);
slave = (struct spi_slave *)(ptr + offset);
slave->bus = bus;
slave->cs = cs;
slave->wordlen = SPI_DEFAULT_WORDLEN;
}
return ptr;
}
#ifdef CONFIG_OF_SPI
struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum,
int node)
{
int cs, max_hz, mode = 0;
cs = fdtdec_get_int(blob, node, "reg", -1);
max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", 100000);
if (fdtdec_get_bool(blob, node, "spi-cpol"))
mode |= SPI_CPOL;
if (fdtdec_get_bool(blob, node, "spi-cpha"))
mode |= SPI_CPHA;
if (fdtdec_get_bool(blob, node, "spi-cs-high"))
mode |= SPI_CS_HIGH;
return spi_setup_slave(busnum, cs, max_hz, mode);
}
#endif
|
