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
devm_clk_release(struct device * dev,void * res)12 static void devm_clk_release(struct device *dev, void *res)
13 {
14 clk_put(*(struct clk **)res);
15 }
16
devm_clk_get(struct device * dev,const char * id)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
devm_clk_match(struct device * dev,void * res,void * data)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
devm_clk_put(struct device * dev,struct clk * clk)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