Commit | Line | Data |
---|---|---|
266e4e9d DA |
1 | /* |
2 | * Copyright 2017 NXP | |
3 | * | |
4 | * Dong Aisheng <aisheng.dong@nxp.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
19 | #include <linux/clk.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/export.h> | |
22 | ||
23 | void clk_bulk_put(int num_clks, struct clk_bulk_data *clks) | |
24 | { | |
25 | while (--num_clks >= 0) { | |
26 | clk_put(clks[num_clks].clk); | |
27 | clks[num_clks].clk = NULL; | |
28 | } | |
29 | } | |
30 | EXPORT_SYMBOL_GPL(clk_bulk_put); | |
31 | ||
32 | int __must_check clk_bulk_get(struct device *dev, int num_clks, | |
33 | struct clk_bulk_data *clks) | |
34 | { | |
35 | int ret; | |
36 | int i; | |
37 | ||
38 | for (i = 0; i < num_clks; i++) | |
39 | clks[i].clk = NULL; | |
40 | ||
41 | for (i = 0; i < num_clks; i++) { | |
42 | clks[i].clk = clk_get(dev, clks[i].id); | |
43 | if (IS_ERR(clks[i].clk)) { | |
44 | ret = PTR_ERR(clks[i].clk); | |
45 | dev_err(dev, "Failed to get clk '%s': %d\n", | |
46 | clks[i].id, ret); | |
47 | clks[i].clk = NULL; | |
48 | goto err; | |
49 | } | |
50 | } | |
51 | ||
52 | return 0; | |
53 | ||
54 | err: | |
55 | clk_bulk_put(i, clks); | |
56 | ||
57 | return ret; | |
58 | } | |
59 | EXPORT_SYMBOL(clk_bulk_get); | |
60 | ||
61 | #ifdef CONFIG_HAVE_CLK_PREPARE | |
62 | ||
63 | /** | |
64 | * clk_bulk_unprepare - undo preparation of a set of clock sources | |
65 | * @num_clks: the number of clk_bulk_data | |
66 | * @clks: the clk_bulk_data table being unprepared | |
67 | * | |
68 | * clk_bulk_unprepare may sleep, which differentiates it from clk_bulk_disable. | |
69 | * Returns 0 on success, -EERROR otherwise. | |
70 | */ | |
71 | void clk_bulk_unprepare(int num_clks, const struct clk_bulk_data *clks) | |
72 | { | |
73 | while (--num_clks >= 0) | |
74 | clk_unprepare(clks[num_clks].clk); | |
75 | } | |
76 | EXPORT_SYMBOL_GPL(clk_bulk_unprepare); | |
77 | ||
78 | /** | |
79 | * clk_bulk_prepare - prepare a set of clocks | |
80 | * @num_clks: the number of clk_bulk_data | |
81 | * @clks: the clk_bulk_data table being prepared | |
82 | * | |
83 | * clk_bulk_prepare may sleep, which differentiates it from clk_bulk_enable. | |
84 | * Returns 0 on success, -EERROR otherwise. | |
85 | */ | |
86 | int __must_check clk_bulk_prepare(int num_clks, | |
87 | const struct clk_bulk_data *clks) | |
88 | { | |
89 | int ret; | |
90 | int i; | |
91 | ||
92 | for (i = 0; i < num_clks; i++) { | |
93 | ret = clk_prepare(clks[i].clk); | |
94 | if (ret) { | |
95 | pr_err("Failed to prepare clk '%s': %d\n", | |
96 | clks[i].id, ret); | |
97 | goto err; | |
98 | } | |
99 | } | |
100 | ||
101 | return 0; | |
102 | ||
103 | err: | |
104 | clk_bulk_unprepare(i, clks); | |
105 | ||
106 | return ret; | |
107 | } | |
9792bf5a | 108 | EXPORT_SYMBOL_GPL(clk_bulk_prepare); |
266e4e9d DA |
109 | |
110 | #endif /* CONFIG_HAVE_CLK_PREPARE */ | |
111 | ||
112 | /** | |
113 | * clk_bulk_disable - gate a set of clocks | |
114 | * @num_clks: the number of clk_bulk_data | |
115 | * @clks: the clk_bulk_data table being gated | |
116 | * | |
117 | * clk_bulk_disable must not sleep, which differentiates it from | |
118 | * clk_bulk_unprepare. clk_bulk_disable must be called before | |
119 | * clk_bulk_unprepare. | |
120 | */ | |
121 | void clk_bulk_disable(int num_clks, const struct clk_bulk_data *clks) | |
122 | { | |
123 | ||
124 | while (--num_clks >= 0) | |
125 | clk_disable(clks[num_clks].clk); | |
126 | } | |
127 | EXPORT_SYMBOL_GPL(clk_bulk_disable); | |
128 | ||
129 | /** | |
130 | * clk_bulk_enable - ungate a set of clocks | |
131 | * @num_clks: the number of clk_bulk_data | |
132 | * @clks: the clk_bulk_data table being ungated | |
133 | * | |
134 | * clk_bulk_enable must not sleep | |
135 | * Returns 0 on success, -EERROR otherwise. | |
136 | */ | |
137 | int __must_check clk_bulk_enable(int num_clks, const struct clk_bulk_data *clks) | |
138 | { | |
139 | int ret; | |
140 | int i; | |
141 | ||
142 | for (i = 0; i < num_clks; i++) { | |
143 | ret = clk_enable(clks[i].clk); | |
144 | if (ret) { | |
145 | pr_err("Failed to enable clk '%s': %d\n", | |
146 | clks[i].id, ret); | |
147 | goto err; | |
148 | } | |
149 | } | |
150 | ||
151 | return 0; | |
152 | ||
153 | err: | |
154 | clk_bulk_disable(i, clks); | |
155 | ||
156 | return ret; | |
157 | } | |
158 | EXPORT_SYMBOL_GPL(clk_bulk_enable); |