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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
/*
* Copyright (C) 2015 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
* Copyright (c) 2016, NVIDIA CORPORATION.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <clk.h>
#include <clk-uclass.h>
#include <dm.h>
#include <dt-structs.h>
#include <errno.h>
DECLARE_GLOBAL_DATA_PTR;
static inline struct clk_ops *clk_dev_ops(struct udevice *dev)
{
return (struct clk_ops *)dev->driver->ops;
}
#if CONFIG_IS_ENABLED(OF_CONTROL)
# if CONFIG_IS_ENABLED(OF_PLATDATA)
int clk_get_by_index_platdata(struct udevice *dev, int index,
struct phandle_2_cell *cells, struct clk *clk)
{
int ret;
if (index != 0)
return -ENOSYS;
ret = uclass_get_device(UCLASS_CLK, 0, &clk->dev);
if (ret)
return ret;
clk->id = cells[0].id;
return 0;
}
# else
static int clk_of_xlate_default(struct clk *clk,
struct fdtdec_phandle_args *args)
{
debug("%s(clk=%p)\n", __func__, clk);
if (args->args_count > 1) {
debug("Invaild args_count: %d\n", args->args_count);
return -EINVAL;
}
if (args->args_count)
clk->id = args->args[0];
else
clk->id = 0;
return 0;
}
int clk_get_by_index(struct udevice *dev, int index, struct clk *clk)
{
int ret;
struct fdtdec_phandle_args args;
struct udevice *dev_clk;
struct clk_ops *ops;
debug("%s(dev=%p, index=%d, clk=%p)\n", __func__, dev, index, clk);
assert(clk);
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, &dev_clk);
if (ret) {
debug("%s: uclass_get_device_by_of_offset failed: err=%d\n",
__func__, ret);
return ret;
}
ops = clk_dev_ops(dev_clk);
if (ops->of_xlate)
ret = ops->of_xlate(clk, &args);
else
ret = clk_of_xlate_default(clk, &args);
if (ret) {
debug("of_xlate() failed: %d\n", ret);
return ret;
}
return clk_request(dev_clk, clk);
}
# endif /* OF_PLATDATA */
int clk_get_by_name(struct udevice *dev, const char *name, struct clk *clk)
{
int index;
debug("%s(dev=%p, name=%s, clk=%p)\n", __func__, dev, name, clk);
index = fdt_find_string(gd->fdt_blob, dev->of_offset, "clock-names",
name);
if (index < 0) {
debug("fdt_find_string() failed: %d\n", index);
return index;
}
return clk_get_by_index(dev, index, clk);
}
#endif /* OF_CONTROL */
int clk_request(struct udevice *dev, struct clk *clk)
{
struct clk_ops *ops = clk_dev_ops(dev);
debug("%s(dev=%p, clk=%p)\n", __func__, dev, clk);
clk->dev = dev;
if (!ops->request)
return 0;
return ops->request(clk);
}
int clk_free(struct clk *clk)
{
struct clk_ops *ops = clk_dev_ops(clk->dev);
debug("%s(clk=%p)\n", __func__, clk);
if (!ops->free)
return 0;
return ops->free(clk);
}
ulong clk_get_rate(struct clk *clk)
{
struct clk_ops *ops = clk_dev_ops(clk->dev);
debug("%s(clk=%p)\n", __func__, clk);
if (!ops->get_rate)
return -ENOSYS;
return ops->get_rate(clk);
}
ulong clk_set_rate(struct clk *clk, ulong rate)
{
struct clk_ops *ops = clk_dev_ops(clk->dev);
debug("%s(clk=%p, rate=%lu)\n", __func__, clk, rate);
if (!ops->set_rate)
return -ENOSYS;
return ops->set_rate(clk, rate);
}
int clk_enable(struct clk *clk)
{
struct clk_ops *ops = clk_dev_ops(clk->dev);
debug("%s(clk=%p)\n", __func__, clk);
if (!ops->enable)
return -ENOSYS;
return ops->enable(clk);
}
int clk_disable(struct clk *clk)
{
struct clk_ops *ops = clk_dev_ops(clk->dev);
debug("%s(clk=%p)\n", __func__, clk);
if (!ops->disable)
return -ENOSYS;
return ops->disable(clk);
}
UCLASS_DRIVER(clk) = {
.id = UCLASS_CLK,
.name = "clk",
};
|
