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authorDavid S. Miller <davem@davemloft.net>2012-09-28 14:40:49 -0400
committerDavid S. Miller <davem@davemloft.net>2012-09-28 14:40:49 -0400
commit6a06e5e1bb217be077e1f8ee2745b4c5b1aa02db (patch)
tree8faea23112a11f52524eb413f71b7b02712d8b53 /drivers/clk/clk-devres.c
parentd9f72f359e00a45a6cd7cc2d5121b04b9dc927e1 (diff)
parent6672d90fe779dc0dfffe027c3ede12609df091c2 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: drivers/net/team/team.c drivers/net/usb/qmi_wwan.c net/batman-adv/bat_iv_ogm.c net/ipv4/fib_frontend.c net/ipv4/route.c net/l2tp/l2tp_netlink.c The team, fib_frontend, route, and l2tp_netlink conflicts were simply overlapping changes. qmi_wwan and bat_iv_ogm were of the "use HEAD" variety. With help from Antonio Quartulli. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/clk/clk-devres.c')
-rw-r--r--drivers/clk/clk-devres.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c
new file mode 100644
index 000000000000..8f571548870f
--- /dev/null
+++ b/drivers/clk/clk-devres.c
@@ -0,0 +1,55 @@
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);