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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/clk.h>
3#include <linux/device.h>
4#include <linux/export.h>
5#include <linux/gfp.h>
6
7static void devm_clk_release(struct device *dev, void *res)
8{
9 clk_put(*(struct clk **)res);
10}
11
12struct clk *devm_clk_get(struct device *dev, const char *id)
13{
14 struct clk **ptr, *clk;
15
16 ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
17 if (!ptr)
18 return ERR_PTR(-ENOMEM);
19
20 clk = clk_get(dev, id);
21 if (!IS_ERR(clk)) {
22 *ptr = clk;
23 devres_add(dev, ptr);
24 } else {
25 devres_free(ptr);
26 }
27
28 return clk;
29}
30EXPORT_SYMBOL(devm_clk_get);
31
32struct clk *devm_clk_get_optional(struct device *dev, const char *id)
33{
34 struct clk *clk = devm_clk_get(dev, id);
35
36 if (clk == ERR_PTR(-ENOENT))
37 return NULL;
38
39 return clk;
40}
41EXPORT_SYMBOL(devm_clk_get_optional);
42
43struct clk_bulk_devres {
44 struct clk_bulk_data *clks;
45 int num_clks;
46};
47
48static void devm_clk_bulk_release(struct device *dev, void *res)
49{
50 struct clk_bulk_devres *devres = res;
51
52 clk_bulk_put(devres->num_clks, devres->clks);
53}
54
55static int __devm_clk_bulk_get(struct device *dev, int num_clks,
56 struct clk_bulk_data *clks, bool optional)
57{
58 struct clk_bulk_devres *devres;
59 int ret;
60
61 devres = devres_alloc(devm_clk_bulk_release,
62 sizeof(*devres), GFP_KERNEL);
63 if (!devres)
64 return -ENOMEM;
65
66 if (optional)
67 ret = clk_bulk_get_optional(dev, num_clks, clks);
68 else
69 ret = clk_bulk_get(dev, num_clks, clks);
70 if (!ret) {
71 devres->clks = clks;
72 devres->num_clks = num_clks;
73 devres_add(dev, devres);
74 } else {
75 devres_free(devres);
76 }
77
78 return ret;
79}
80
81int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
82 struct clk_bulk_data *clks)
83{
84 return __devm_clk_bulk_get(dev, num_clks, clks, false);
85}
86EXPORT_SYMBOL_GPL(devm_clk_bulk_get);
87
88int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks,
89 struct clk_bulk_data *clks)
90{
91 return __devm_clk_bulk_get(dev, num_clks, clks, true);
92}
93EXPORT_SYMBOL_GPL(devm_clk_bulk_get_optional);
94
95int __must_check devm_clk_bulk_get_all(struct device *dev,
96 struct clk_bulk_data **clks)
97{
98 struct clk_bulk_devres *devres;
99 int ret;
100
101 devres = devres_alloc(devm_clk_bulk_release,
102 sizeof(*devres), GFP_KERNEL);
103 if (!devres)
104 return -ENOMEM;
105
106 ret = clk_bulk_get_all(dev, &devres->clks);
107 if (ret > 0) {
108 *clks = devres->clks;
109 devres->num_clks = ret;
110 devres_add(dev, devres);
111 } else {
112 devres_free(devres);
113 }
114
115 return ret;
116}
117EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all);
118
119static int devm_clk_match(struct device *dev, void *res, void *data)
120{
121 struct clk **c = res;
122 if (!c || !*c) {
123 WARN_ON(!c || !*c);
124 return 0;
125 }
126 return *c == data;
127}
128
129void devm_clk_put(struct device *dev, struct clk *clk)
130{
131 int ret;
132
133 ret = devres_release(dev, devm_clk_release, devm_clk_match, clk);
134
135 WARN_ON(ret);
136}
137EXPORT_SYMBOL(devm_clk_put);
138
139struct clk *devm_get_clk_from_child(struct device *dev,
140 struct device_node *np, const char *con_id)
141{
142 struct clk **ptr, *clk;
143
144 ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
145 if (!ptr)
146 return ERR_PTR(-ENOMEM);
147
148 clk = of_clk_get_by_name(np, con_id);
149 if (!IS_ERR(clk)) {
150 *ptr = clk;
151 devres_add(dev, ptr);
152 } else {
153 devres_free(ptr);
154 }
155
156 return clk;
157}
158EXPORT_SYMBOL(devm_get_clk_from_child);
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/clk.h>
3#include <linux/device.h>
4#include <linux/export.h>
5#include <linux/gfp.h>
6
7struct devm_clk_state {
8 struct clk *clk;
9 void (*exit)(struct clk *clk);
10};
11
12static void devm_clk_release(struct device *dev, void *res)
13{
14 struct devm_clk_state *state = res;
15
16 if (state->exit)
17 state->exit(state->clk);
18
19 clk_put(state->clk);
20}
21
22static struct clk *__devm_clk_get(struct device *dev, const char *id,
23 struct clk *(*get)(struct device *dev, const char *id),
24 int (*init)(struct clk *clk),
25 void (*exit)(struct clk *clk))
26{
27 struct devm_clk_state *state;
28 struct clk *clk;
29 int ret;
30
31 state = devres_alloc(devm_clk_release, sizeof(*state), GFP_KERNEL);
32 if (!state)
33 return ERR_PTR(-ENOMEM);
34
35 clk = get(dev, id);
36 if (IS_ERR(clk)) {
37 ret = PTR_ERR(clk);
38 goto err_clk_get;
39 }
40
41 if (init) {
42 ret = init(clk);
43 if (ret)
44 goto err_clk_init;
45 }
46
47 state->clk = clk;
48 state->exit = exit;
49
50 devres_add(dev, state);
51
52 return clk;
53
54err_clk_init:
55
56 clk_put(clk);
57err_clk_get:
58
59 devres_free(state);
60 return ERR_PTR(ret);
61}
62
63struct clk *devm_clk_get(struct device *dev, const char *id)
64{
65 return __devm_clk_get(dev, id, clk_get, NULL, NULL);
66}
67EXPORT_SYMBOL(devm_clk_get);
68
69struct clk *devm_clk_get_prepared(struct device *dev, const char *id)
70{
71 return __devm_clk_get(dev, id, clk_get, clk_prepare, clk_unprepare);
72}
73EXPORT_SYMBOL_GPL(devm_clk_get_prepared);
74
75struct clk *devm_clk_get_enabled(struct device *dev, const char *id)
76{
77 return __devm_clk_get(dev, id, clk_get,
78 clk_prepare_enable, clk_disable_unprepare);
79}
80EXPORT_SYMBOL_GPL(devm_clk_get_enabled);
81
82struct clk *devm_clk_get_optional(struct device *dev, const char *id)
83{
84 return __devm_clk_get(dev, id, clk_get_optional, NULL, NULL);
85}
86EXPORT_SYMBOL(devm_clk_get_optional);
87
88struct clk *devm_clk_get_optional_prepared(struct device *dev, const char *id)
89{
90 return __devm_clk_get(dev, id, clk_get_optional,
91 clk_prepare, clk_unprepare);
92}
93EXPORT_SYMBOL_GPL(devm_clk_get_optional_prepared);
94
95struct clk *devm_clk_get_optional_enabled(struct device *dev, const char *id)
96{
97 return __devm_clk_get(dev, id, clk_get_optional,
98 clk_prepare_enable, clk_disable_unprepare);
99}
100EXPORT_SYMBOL_GPL(devm_clk_get_optional_enabled);
101
102struct clk_bulk_devres {
103 struct clk_bulk_data *clks;
104 int num_clks;
105};
106
107static void devm_clk_bulk_release(struct device *dev, void *res)
108{
109 struct clk_bulk_devres *devres = res;
110
111 clk_bulk_put(devres->num_clks, devres->clks);
112}
113
114static int __devm_clk_bulk_get(struct device *dev, int num_clks,
115 struct clk_bulk_data *clks, bool optional)
116{
117 struct clk_bulk_devres *devres;
118 int ret;
119
120 devres = devres_alloc(devm_clk_bulk_release,
121 sizeof(*devres), GFP_KERNEL);
122 if (!devres)
123 return -ENOMEM;
124
125 if (optional)
126 ret = clk_bulk_get_optional(dev, num_clks, clks);
127 else
128 ret = clk_bulk_get(dev, num_clks, clks);
129 if (!ret) {
130 devres->clks = clks;
131 devres->num_clks = num_clks;
132 devres_add(dev, devres);
133 } else {
134 devres_free(devres);
135 }
136
137 return ret;
138}
139
140int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
141 struct clk_bulk_data *clks)
142{
143 return __devm_clk_bulk_get(dev, num_clks, clks, false);
144}
145EXPORT_SYMBOL_GPL(devm_clk_bulk_get);
146
147int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks,
148 struct clk_bulk_data *clks)
149{
150 return __devm_clk_bulk_get(dev, num_clks, clks, true);
151}
152EXPORT_SYMBOL_GPL(devm_clk_bulk_get_optional);
153
154static void devm_clk_bulk_release_all(struct device *dev, void *res)
155{
156 struct clk_bulk_devres *devres = res;
157
158 clk_bulk_put_all(devres->num_clks, devres->clks);
159}
160
161int __must_check devm_clk_bulk_get_all(struct device *dev,
162 struct clk_bulk_data **clks)
163{
164 struct clk_bulk_devres *devres;
165 int ret;
166
167 devres = devres_alloc(devm_clk_bulk_release_all,
168 sizeof(*devres), GFP_KERNEL);
169 if (!devres)
170 return -ENOMEM;
171
172 ret = clk_bulk_get_all(dev, &devres->clks);
173 if (ret > 0) {
174 *clks = devres->clks;
175 devres->num_clks = ret;
176 devres_add(dev, devres);
177 } else {
178 devres_free(devres);
179 }
180
181 return ret;
182}
183EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all);
184
185static int devm_clk_match(struct device *dev, void *res, void *data)
186{
187 struct clk **c = res;
188 if (!c || !*c) {
189 WARN_ON(!c || !*c);
190 return 0;
191 }
192 return *c == data;
193}
194
195void devm_clk_put(struct device *dev, struct clk *clk)
196{
197 int ret;
198
199 ret = devres_release(dev, devm_clk_release, devm_clk_match, clk);
200
201 WARN_ON(ret);
202}
203EXPORT_SYMBOL(devm_clk_put);
204
205struct clk *devm_get_clk_from_child(struct device *dev,
206 struct device_node *np, const char *con_id)
207{
208 struct clk **ptr, *clk;
209
210 ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
211 if (!ptr)
212 return ERR_PTR(-ENOMEM);
213
214 clk = of_clk_get_by_name(np, con_id);
215 if (!IS_ERR(clk)) {
216 *ptr = clk;
217 devres_add(dev, ptr);
218 } else {
219 devres_free(ptr);
220 }
221
222 return clk;
223}
224EXPORT_SYMBOL(devm_get_clk_from_child);