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
193
194
195
196
197
198
199
200
201
202
203
204
205
206
|
// SPDX-License-Identifier: GPL-2.0
/*
* (C) Copyright 2015 Google, Inc
*/
#include <common.h>
#include <clk-uclass.h>
#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <asm/clk.h>
#include <linux/clk-provider.h>
static ulong sandbox_clk_get_rate(struct clk *clk)
{
struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
if (!priv->probed)
return -ENODEV;
if (clk->id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
return priv->rate[clk->id];
}
static ulong sandbox_clk_round_rate(struct clk *clk, ulong rate)
{
struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
if (!priv->probed)
return -ENODEV;
if (clk->id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
if (!rate)
return -EINVAL;
return rate;
}
static ulong sandbox_clk_set_rate(struct clk *clk, ulong rate)
{
struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
ulong old_rate;
if (!priv->probed)
return -ENODEV;
if (clk->id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
if (!rate)
return -EINVAL;
old_rate = priv->rate[clk->id];
priv->rate[clk->id] = rate;
return old_rate;
}
static int sandbox_clk_enable(struct clk *clk)
{
struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
if (!priv->probed)
return -ENODEV;
if (clk->id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
priv->enabled[clk->id] = true;
return 0;
}
static int sandbox_clk_disable(struct clk *clk)
{
struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
if (!priv->probed)
return -ENODEV;
if (clk->id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
priv->enabled[clk->id] = false;
return 0;
}
static int sandbox_clk_request(struct clk *clk)
{
struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
if (clk->id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
priv->requested[clk->id] = true;
return 0;
}
static int sandbox_clk_free(struct clk *clk)
{
struct sandbox_clk_priv *priv = dev_get_priv(clk->dev);
if (clk->id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
priv->requested[clk->id] = false;
return 0;
}
static struct clk_ops sandbox_clk_ops = {
.round_rate = sandbox_clk_round_rate,
.get_rate = sandbox_clk_get_rate,
.set_rate = sandbox_clk_set_rate,
.enable = sandbox_clk_enable,
.disable = sandbox_clk_disable,
.request = sandbox_clk_request,
.rfree = sandbox_clk_free,
};
static int sandbox_clk_probe(struct udevice *dev)
{
struct sandbox_clk_priv *priv = dev_get_priv(dev);
priv->probed = true;
return 0;
}
static const struct udevice_id sandbox_clk_ids[] = {
{ .compatible = "sandbox,clk" },
{ }
};
U_BOOT_DRIVER(sandbox_clk) = {
.name = "sandbox_clk",
.id = UCLASS_CLK,
.of_match = sandbox_clk_ids,
.ops = &sandbox_clk_ops,
.probe = sandbox_clk_probe,
.priv_auto = sizeof(struct sandbox_clk_priv),
};
ulong sandbox_clk_query_rate(struct udevice *dev, int id)
{
struct sandbox_clk_priv *priv = dev_get_priv(dev);
if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
return priv->rate[id];
}
int sandbox_clk_query_enable(struct udevice *dev, int id)
{
struct sandbox_clk_priv *priv = dev_get_priv(dev);
if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
return priv->enabled[id];
}
int sandbox_clk_query_requested(struct udevice *dev, int id)
{
struct sandbox_clk_priv *priv = dev_get_priv(dev);
if (id < 0 || id >= SANDBOX_CLK_ID_COUNT)
return -EINVAL;
return priv->requested[id];
}
int clk_fixed_rate_of_to_plat(struct udevice *dev)
{
struct clk_fixed_rate *cplat;
#if CONFIG_IS_ENABLED(OF_PLATDATA)
struct sandbox_clk_fixed_rate_plat *plat = dev_get_plat(dev);
cplat = &plat->fixed;
cplat->fixed_rate = plat->dtplat.clock_frequency;
#else
cplat = to_clk_fixed_rate(dev);
#endif
clk_fixed_rate_ofdata_to_plat_(dev, cplat);
return 0;
}
static const struct udevice_id sandbox_clk_fixed_rate_match[] = {
{ .compatible = "sandbox,fixed-clock" },
{ /* sentinel */ }
};
U_BOOT_DRIVER(sandbox_fixed_clock) = {
.name = "sandbox_fixed_clock",
.id = UCLASS_CLK,
.of_match = sandbox_clk_fixed_rate_match,
.of_to_plat = clk_fixed_rate_of_to_plat,
.plat_auto = sizeof(struct sandbox_clk_fixed_rate_plat),
.ops = &clk_fixed_rate_ops,
.flags = DM_FLAG_PRE_RELOC,
};
|
