Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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
55int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
56 struct clk_bulk_data *clks)
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 ret = clk_bulk_get(dev, num_clks, clks);
67 if (!ret) {
68 devres->clks = clks;
69 devres->num_clks = num_clks;
70 devres_add(dev, devres);
71 } else {
72 devres_free(devres);
73 }
74
75 return ret;
76}
77EXPORT_SYMBOL_GPL(devm_clk_bulk_get);
78
79int __must_check devm_clk_bulk_get_all(struct device *dev,
80 struct clk_bulk_data **clks)
81{
82 struct clk_bulk_devres *devres;
83 int ret;
84
85 devres = devres_alloc(devm_clk_bulk_release,
86 sizeof(*devres), GFP_KERNEL);
87 if (!devres)
88 return -ENOMEM;
89
90 ret = clk_bulk_get_all(dev, &devres->clks);
91 if (ret > 0) {
92 *clks = devres->clks;
93 devres->num_clks = ret;
94 devres_add(dev, devres);
95 } else {
96 devres_free(devres);
97 }
98
99 return ret;
100}
101EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all);
102
103static int devm_clk_match(struct device *dev, void *res, void *data)
104{
105 struct clk **c = res;
106 if (!c || !*c) {
107 WARN_ON(!c || !*c);
108 return 0;
109 }
110 return *c == data;
111}
112
113void devm_clk_put(struct device *dev, struct clk *clk)
114{
115 int ret;
116
117 ret = devres_release(dev, devm_clk_release, devm_clk_match, clk);
118
119 WARN_ON(ret);
120}
121EXPORT_SYMBOL(devm_clk_put);
122
123struct clk *devm_get_clk_from_child(struct device *dev,
124 struct device_node *np, const char *con_id)
125{
126 struct clk **ptr, *clk;
127
128 ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
129 if (!ptr)
130 return ERR_PTR(-ENOMEM);
131
132 clk = of_clk_get_by_name(np, con_id);
133 if (!IS_ERR(clk)) {
134 *ptr = clk;
135 devres_add(dev, ptr);
136 } else {
137 devres_free(ptr);
138 }
139
140 return clk;
141}
142EXPORT_SYMBOL(devm_get_clk_from_child);