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
12static void devm_clk_release(struct device *dev, void *res)
13{
14	clk_put(*(struct clk **)res);
15}
16
17struct 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}
35EXPORT_SYMBOL(devm_clk_get);
36
37static 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
47void 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}
55EXPORT_SYMBOL(devm_clk_put);
56