[mirror_ubuntu-bionic-kernel.git] / drivers / clk / clk-devres.c

/*
 * 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 {
		devres_free(ptr);
	}

	return clk;
}
EXPORT_SYMBOL(devm_clk_get);

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);

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
8ef997b6 LPC	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
	12	static void devm_clk_release(struct device dev, void res)
	13	{
	14	clk_put((struct clk *)res);
	15	}
	16
	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
618aee02 DA	37	struct clk_bulk_devres {
	38	struct clk_bulk_data *clks;
	39	int num_clks;
	40	};
	41
	42	static void devm_clk_bulk_release(struct device dev, void res)
	43	{
	44	struct clk_bulk_devres *devres = res;
	45
	46	clk_bulk_put(devres->num_clks, devres->clks);
	47	}
	48
	49	int __must_check devm_clk_bulk_get(struct device *dev, int num_clks,
	50	struct clk_bulk_data *clks)
	51	{
	52	struct clk_bulk_devres *devres;
	53	int ret;
	54
	55	devres = devres_alloc(devm_clk_bulk_release,
	56	sizeof(*devres), GFP_KERNEL);
	57	if (!devres)
	58	return -ENOMEM;
	59
	60	ret = clk_bulk_get(dev, num_clks, clks);
	61	if (!ret) {
	62	devres->clks = clks;
	63	devres->num_clks = num_clks;
	64	devres_add(dev, devres);
	65	} else {
	66	devres_free(devres);
	67	}
	68
	69	return ret;
	70	}
	71	EXPORT_SYMBOL_GPL(devm_clk_bulk_get);
	72
8ef997b6 LPC	73	static int devm_clk_match(struct device dev, void res, void *data)
	74	{
	75	struct clk **c = res;
	76	if (!c \|\| !*c) {
	77	WARN_ON(!c \|\| !*c);
	78	return 0;
	79	}
	80	return *c == data;
	81	}
	82
	83	void devm_clk_put(struct device dev, struct clk clk)
	84	{
	85	int ret;
	86
20332ff3	87	ret = devres_release(dev, devm_clk_release, devm_clk_match, clk);
8ef997b6 LPC	88
	89	WARN_ON(ret);
	90	}
	91	EXPORT_SYMBOL(devm_clk_put);
71a2f115 KM	92
	93	struct clk devm_get_clk_from_child(struct device dev,
	94	struct device_node np, const char con_id)
	95	{
	96	struct clk *ptr, clk;
	97
	98	ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL);
	99	if (!ptr)
	100	return ERR_PTR(-ENOMEM);
	101
	102	clk = of_clk_get_by_name(np, con_id);
	103	if (!IS_ERR(clk)) {
	104	*ptr = clk;
	105	devres_add(dev, ptr);
	106	} else {
	107	devres_free(ptr);
	108	}
	109
	110	return clk;
	111	}
	112	EXPORT_SYMBOL(devm_get_clk_from_child);