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
|
/*
* Copyright 2017 NXP
*
* Dong Aisheng <aisheng.dong@nxp.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/export.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);
int __must_check clk_bulk_get(struct device *dev, int num_clks,
struct clk_bulk_data *clks)
{
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);
dev_err(dev, "Failed to get clk '%s': %d\n",
clks[i].id, ret);
clks[i].clk = NULL;
goto err;
}
}
return 0;
err:
clk_bulk_put(i, clks);
return ret;
}
EXPORT_SYMBOL(clk_bulk_get);
#ifdef CONFIG_HAVE_CLK_PREPARE
/**
* clk_bulk_unprepare - undo preparation of a set of clock sources
* @num_clks: the number of clk_bulk_data
* @clks: the clk_bulk_data table being unprepared
*
* clk_bulk_unprepare may sleep, which differentiates it from clk_bulk_disable.
* Returns 0 on success, -EERROR otherwise.
*/
void clk_bulk_unprepare(int num_clks, const struct clk_bulk_data *clks)
{
while (--num_clks >= 0)
clk_unprepare(clks[num_clks].clk);
}
EXPORT_SYMBOL_GPL(clk_bulk_unprepare);
/**
* clk_bulk_prepare - prepare a set of clocks
* @num_clks: the number of clk_bulk_data
* @clks: the clk_bulk_data table being prepared
*
* clk_bulk_prepare may sleep, which differentiates it from clk_bulk_enable.
* Returns 0 on success, -EERROR otherwise.
*/
int __must_check clk_bulk_prepare(int num_clks,
const struct clk_bulk_data *clks)
{
int ret;
int i;
for (i = 0; i < num_clks; i++) {
ret = clk_prepare(clks[i].clk);
if (ret) {
pr_err("Failed to prepare clk '%s': %d\n",
clks[i].id, ret);
goto err;
}
}
return 0;
err:
clk_bulk_unprepare(i, clks);
return ret;
}
#endif /* CONFIG_HAVE_CLK_PREPARE */
/**
* 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);
|
