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* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
#include <linux/clk.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/gfp.h>
static void devm_clk_release(struct device *dev, void *res)
clk_put(*(struct clk **)res);
struct clk *devm_clk_get(struct device *dev, const char *id)
struct clk **ptr, *clk;
ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
if (!ptr)
return ERR_PTR(-ENOMEM);
clk = clk_get(dev, id);
if (!IS_ERR(clk)) {
*ptr = clk;
devres_add(dev, ptr);
} else {
return clk;
static int devm_clk_match(struct device *dev, void *res, void *data)
struct clk **c = res;
if (!c || !*c) {
WARN_ON(!c || !*c);
return 0;
return *c == data;
void devm_clk_put(struct device *dev, struct clk *clk)
int ret;
ret = devres_release(dev, devm_clk_release, devm_clk_match, clk);