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1 | /* |
2 | * This program is free software; you can redistribute it and/or modify |
3 | * it under the terms of the GNU General Public License version 2 as |
4 | * published by the Free Software Foundation. |
5 | */ |
6 | |
7 | #include <linux/clk.h> |
8 | #include <linux/device.h> |
9 | #include <linux/export.h> |
10 | #include <linux/gfp.h> |
11 | |
12 | static void devm_clk_release(struct device *dev, void *res) |
13 | { |
14 | clk_put(*(struct clk **)res); |
15 | } |
16 | |
17 | struct clk *devm_clk_get(struct device *dev, const char *id) |
18 | { |
19 | struct clk **ptr, *clk; |
20 | |
21 | ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL); |
22 | if (!ptr) |
23 | return ERR_PTR(-ENOMEM); |
24 | |
25 | clk = clk_get(dev, id); |
26 | if (!IS_ERR(clk)) { |
27 | *ptr = clk; |
28 | devres_add(dev, ptr); |
29 | } else { |
30 | devres_free(ptr); |
31 | } |
32 | |
33 | return clk; |
34 | } |
35 | EXPORT_SYMBOL(devm_clk_get); |
36 | |
37 | static int devm_clk_match(struct device *dev, void *res, void *data) |
38 | { |
39 | struct clk **c = res; |
40 | if (!c || !*c) { |
41 | WARN_ON(!c || !*c); |
42 | return 0; |
43 | } |
44 | return *c == data; |
45 | } |
46 | |
47 | void devm_clk_put(struct device *dev, struct clk *clk) |
48 | { |
49 | int ret; |
50 | |
51 | ret = devres_release(dev, devm_clk_release, devm_clk_match, clk); |
52 | |
53 | WARN_ON(ret); |
54 | } |
55 | EXPORT_SYMBOL(devm_clk_put); |
56 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9