[linux-2.6-block.git] / drivers / clk / clk-devres.c

// SPDX-License-Identifier: GPL-2.0
#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 {
		devres_free(ptr);
	}

	return clk;
}
EXPORT_SYMBOL(devm_clk_get);

struct clk *devm_clk_get_optional(struct device *dev, const char *id)
{
	struct clk *clk = devm_clk_get(dev, id);

	if (clk == ERR_PTR(-ENOENT))
		return NULL;

	return clk;
}
EXPORT_SYMBOL(devm_clk_get_optional);

struct clk_bulk_devres {
	struct clk_bulk_data *clks;
	int num_clks;
};

static void devm_clk_bulk_release(struct device *dev, void *res)
{
	struct clk_bulk_devres *devres = res;

	clk_bulk_put(devres->num_clks, devres->clks);
}

int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
		      struct clk_bulk_data *clks)
{
	struct clk_bulk_devres *devres;
	int ret;

	devres = devres_alloc(devm_clk_bulk_release,
			      sizeof(*devres), GFP_KERNEL);
	if (!devres)
		return -ENOMEM;

	ret = clk_bulk_get(dev, num_clks, clks);
	if (!ret) {
		devres->clks = clks;
		devres->num_clks = num_clks;
		devres_add(dev, devres);
	} else {
		devres_free(devres);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get);

int __must_check devm_clk_bulk_get_all(struct device *dev,
				       struct clk_bulk_data **clks)
{
	struct clk_bulk_devres *devres;
	int ret;

	devres = devres_alloc(devm_clk_bulk_release,
			      sizeof(*devres), GFP_KERNEL);
	if (!devres)
		return -ENOMEM;

	ret = clk_bulk_get_all(dev, &devres->clks);
	if (ret > 0) {
		*clks = devres->clks;
		devres->num_clks = ret;
		devres_add(dev, devres);
	} else {
		devres_free(devres);
	}

	return ret;
}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all);

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);

	WARN_ON(ret);
}
EXPORT_SYMBOL(devm_clk_put);

struct clk *devm_get_clk_from_child(struct device *dev,
				    struct device_node *np, const char *con_id)
{
	struct clk **ptr, *clk;

	ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
	if (!ptr)
		return ERR_PTR(-ENOMEM);

	clk = of_clk_get_by_name(np, con_id);
	if (!IS_ERR(clk)) {
		*ptr = clk;
		devres_add(dev, ptr);
	} else {
		devres_free(ptr);
	}

	return clk;
}
EXPORT_SYMBOL(devm_get_clk_from_child);
Commit	Line	Data
ebafb63d	1	// SPDX-License-Identifier: GPL-2.0
8ef997b6 LPC	2	#include <linux/clk.h>
	3	#include <linux/device.h>
	4	#include <linux/export.h>
	5	#include <linux/gfp.h>
	6
	7	static void devm_clk_release(struct device dev, void res)
	8	{
	9	clk_put((struct clk *)res);
	10	}
	11
	12	struct clk devm_clk_get(struct device dev, const char *id)
	13	{
	14	struct clk *ptr, clk;
	15
	16	ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
	17	if (!ptr)
	18	return ERR_PTR(-ENOMEM);
	19
	20	clk = clk_get(dev, id);
	21	if (!IS_ERR(clk)) {
	22	*ptr = clk;
	23	devres_add(dev, ptr);
	24	} else {
	25	devres_free(ptr);
	26	}
	27
	28	return clk;
	29	}
	30	EXPORT_SYMBOL(devm_clk_get);
	31
60b8f0dd PE	32	struct clk devm_clk_get_optional(struct device dev, const char *id)
	33	{
	34	struct clk *clk = devm_clk_get(dev, id);
	35
	36	if (clk == ERR_PTR(-ENOENT))
	37	return NULL;
	38
	39	return clk;
	40	}
	41	EXPORT_SYMBOL(devm_clk_get_optional);
	42
618aee02 DA	43	struct clk_bulk_devres {
	44	struct clk_bulk_data *clks;
	45	int num_clks;
	46	};
	47
	48	static void devm_clk_bulk_release(struct device dev, void res)
	49	{
	50	struct clk_bulk_devres *devres = res;
	51
	52	clk_bulk_put(devres->num_clks, devres->clks);
	53	}
	54
	55	int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
	56	struct clk_bulk_data *clks)
	57	{
	58	struct clk_bulk_devres *devres;
	59	int ret;
	60
	61	devres = devres_alloc(devm_clk_bulk_release,
	62	sizeof(*devres), GFP_KERNEL);
	63	if (!devres)
	64	return -ENOMEM;
	65
	66	ret = clk_bulk_get(dev, num_clks, clks);
	67	if (!ret) {
	68	devres->clks = clks;
	69	devres->num_clks = num_clks;
	70	devres_add(dev, devres);
	71	} else {
	72	devres_free(devres);
	73	}
	74
	75	return ret;
	76	}
	77	EXPORT_SYMBOL_GPL(devm_clk_bulk_get);
	78
f08c2e28 DA	79	int __must_check devm_clk_bulk_get_all(struct device *dev,
	80	struct clk_bulk_data **clks)
	81	{
	82	struct clk_bulk_devres *devres;
	83	int ret;
	84
	85	devres = devres_alloc(devm_clk_bulk_release,
	86	sizeof(*devres), GFP_KERNEL);
	87	if (!devres)
	88	return -ENOMEM;
	89
	90	ret = clk_bulk_get_all(dev, &devres->clks);
	91	if (ret > 0) {
	92	*clks = devres->clks;
	93	devres->num_clks = ret;
	94	devres_add(dev, devres);
	95	} else {
	96	devres_free(devres);
	97	}
	98
	99	return ret;
	100	}
	101	EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all);
	102
8ef997b6 LPC	103	static int devm_clk_match(struct device dev, void res, void *data)
	104	{
	105	struct clk **c = res;
	106	if (!c \|\| !*c) {
	107	WARN_ON(!c \|\| !*c);
	108	return 0;
	109	}
	110	return *c == data;
	111	}
	112
	113	void devm_clk_put(struct device dev, struct clk clk)
	114	{
	115	int ret;
	116
20332ff3	117	ret = devres_release(dev, devm_clk_release, devm_clk_match, clk);
8ef997b6 LPC	118
	119	WARN_ON(ret);
	120	}
	121	EXPORT_SYMBOL(devm_clk_put);
71a2f115 KM	122
	123	struct clk devm_get_clk_from_child(struct device dev,
	124	struct device_node np, const char con_id)
	125	{
	126	struct clk *ptr, clk;
	127
	128	ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
	129	if (!ptr)
	130	return ERR_PTR(-ENOMEM);
	131
	132	clk = of_clk_get_by_name(np, con_id);
	133	if (!IS_ERR(clk)) {
	134	*ptr = clk;
	135	devres_add(dev, ptr);
	136	} else {
	137	devres_free(ptr);
	138	}
	139
	140	return clk;
	141	}
	142	EXPORT_SYMBOL(devm_get_clk_from_child);