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
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <clk.h>
#include <dm.h>
#include <errno.h>
#include <dm/lists.h>
#include <dm/root.h>
DECLARE_GLOBAL_DATA_PTR;
ulong clk_get_rate(struct udevice *dev)
{
struct clk_ops *ops = clk_get_ops(dev);
if (!ops->get_rate)
return -ENOSYS;
return ops->get_rate(dev);
}
ulong clk_set_rate(struct udevice *dev, ulong rate)
{
struct clk_ops *ops = clk_get_ops(dev);
if (!ops->set_rate)
return -ENOSYS;
return ops->set_rate(dev, rate);
}
int clk_enable(struct udevice *dev, int periph)
{
struct clk_ops *ops = clk_get_ops(dev);
if (!ops->enable)
return -ENOSYS;
return ops->enable(dev, periph);
}
ulong clk_get_periph_rate(struct udevice *dev, int periph)
{
struct clk_ops *ops = clk_get_ops(dev);
if (!ops->get_periph_rate)
return -ENOSYS;
return ops->get_periph_rate(dev, periph);
}
ulong clk_set_periph_rate(struct udevice *dev, int periph, ulong rate)
{
struct clk_ops *ops = clk_get_ops(dev);
if (!ops->set_periph_rate)
return -ENOSYS;
return ops->set_periph_rate(dev, periph, rate);
}
#if CONFIG_IS_ENABLED(OF_CONTROL)
int clk_get_by_index(struct udevice *dev, int index, struct udevice **clk_devp)
{
int ret;
#ifdef CONFIG_SPL_BUILD
u32 cell[2];
if (index != 0)
return -ENOSYS;
assert(*clk_devp);
ret = uclass_get_device(UCLASS_CLK, 0, clk_devp);
if (ret)
return ret;
ret = fdtdec_get_int_array(gd->fdt_blob, dev->of_offset, "clocks",
cell, 2);
if (ret)
return ret;
return cell[1];
#else
struct fdtdec_phandle_args args;
assert(*clk_devp);
ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset,
"clocks", "#clock-cells", 0, index,
&args);
if (ret) {
debug("%s: fdtdec_parse_phandle_with_args failed: err=%d\n",
__func__, ret);
return ret;
}
ret = uclass_get_device_by_of_offset(UCLASS_CLK, args.node, clk_devp);
if (ret) {
debug("%s: uclass_get_device_by_of_offset failed: err=%d\n",
__func__, ret);
return ret;
}
return args.args_count > 0 ? args.args[0] : 0;
#endif
}
#endif
UCLASS_DRIVER(clk) = {
.id = UCLASS_CLK,
.name = "clk",
};
|
