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
|
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2017 NXP
*
* Dong Aisheng <aisheng.dong@nxp.com>
*/
#include <common.h>
#include <errno.h>
#include <malloc.h>
#include <stringlist.h>
#include <complete.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/clk/clk-conf.h>
void clk_bulk_put(int num_clks, struct clk_bulk_data *clks)
{
while (--num_clks >= 0) {
clk_put(clks[num_clks].clk);
clks[num_clks].clk = NULL;
}
}
EXPORT_SYMBOL_GPL(clk_bulk_put);
static int __clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks,
bool optional)
{
int ret;
int i;
for (i = 0; i < num_clks; i++)
clks[i].clk = NULL;
for (i = 0; i < num_clks; i++) {
clks[i].clk = clk_get(dev, clks[i].id);
if (IS_ERR(clks[i].clk)) {
ret = PTR_ERR(clks[i].clk);
clks[i].clk = NULL;
if (ret == -ENOENT && optional)
continue;
if (ret != -EPROBE_DEFER)
dev_err(dev, "Failed to get clk '%s': %d\n",
clks[i].id, ret);
goto err;
}
}
return 0;
err:
clk_bulk_put(i, clks);
return ret;
}
int __must_check clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks)
{
return __clk_bulk_get(dev, num_clks, clks, false);
}
EXPORT_SYMBOL(clk_bulk_get);
int __must_check clk_bulk_get_optional(struct device *dev, int num_clks,
struct clk_bulk_data *clks)
{
return __clk_bulk_get(dev, num_clks, clks, true);
}
EXPORT_SYMBOL(clk_bulk_get_optional);
static int __must_check of_clk_bulk_get(struct device_node *np, int num_clks,
struct clk_bulk_data *clks)
{
int ret;
int i;
for (i = 0; i < num_clks; i++) {
clks[i].id = NULL;
clks[i].clk = NULL;
}
for (i = 0; i < num_clks; i++) {
of_property_read_string_index(np, "clock-names", i, &clks[i].id);
clks[i].clk = of_clk_get(np, i);
if (IS_ERR(clks[i].clk)) {
ret = PTR_ERR(clks[i].clk);
if (ret != -EPROBE_DEFER)
pr_err("%s: Failed to get clk index: %d ret: %pe\n",
np->name, i, clks[i].clk);
clks[i].clk = NULL;
goto err;
}
}
return 0;
err:
clk_bulk_put(i, clks);
return ret;
}
static int __must_check of_clk_bulk_get_all(struct device_node *np,
struct clk_bulk_data **clks)
{
struct clk_bulk_data *clk_bulk;
int num_clks;
int ret;
num_clks = of_clk_get_parent_count(np);
if (!num_clks)
return 0;
clk_bulk = kmalloc_array(num_clks, sizeof(*clk_bulk), GFP_KERNEL);
if (!clk_bulk)
return -ENOMEM;
ret = of_clk_bulk_get(np, num_clks, clk_bulk);
if (ret) {
kfree(clk_bulk);
return ret;
}
*clks = clk_bulk;
return num_clks;
}
void clk_bulk_put_all(int num_clks, struct clk_bulk_data *clks)
{
if (IS_ERR_OR_NULL(clks))
return;
clk_bulk_put(num_clks, clks);
kfree(clks);
}
EXPORT_SYMBOL(clk_bulk_put_all);
int __must_check clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks)
{
struct device_node *np = dev->of_node;
if (!np)
return 0;
return of_clk_bulk_get_all(np, clks);
}
EXPORT_SYMBOL(clk_bulk_get_all);
/**
* clk_bulk_disable - gate a set of clocks
* @num_clks: the number of clk_bulk_data
* @clks: the clk_bulk_data table being gated
*
* clk_bulk_disable must not sleep, which differentiates it from
* clk_bulk_unprepare. clk_bulk_disable must be called before
* clk_bulk_unprepare.
*/
void clk_bulk_disable(int num_clks, const struct clk_bulk_data *clks)
{
while (--num_clks >= 0)
clk_disable(clks[num_clks].clk);
}
EXPORT_SYMBOL_GPL(clk_bulk_disable);
/**
* clk_bulk_enable - ungate a set of clocks
* @num_clks: the number of clk_bulk_data
* @clks: the clk_bulk_data table being ungated
*
* clk_bulk_enable must not sleep
* Returns 0 on success, -EERROR otherwise.
*/
int __must_check clk_bulk_enable(int num_clks, const struct clk_bulk_data *clks)
{
int ret;
int i;
for (i = 0; i < num_clks; i++) {
ret = clk_enable(clks[i].clk);
if (ret) {
pr_err("Failed to enable clk '%s': %d\n",
clks[i].id, ret);
goto err;
}
}
return 0;
err:
clk_bulk_disable(i, clks);
return ret;
}
EXPORT_SYMBOL_GPL(clk_bulk_enable);
|
