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

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright 2017 NXP
 *
 * Dong Aisheng <aisheng.dong@nxp.com>
 */

#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/device.h>
#include <linux/export.h>
#include <linux/of.h>
#include <linux/slab.h>

static int __must_check of_clk_bulk_get(struct device_node *np, int num_clks,
					struct clk_bulk_data *clks)
{
	int ret;
	int i;

	for (i = 0; i < num_clks; i++)
		clks[i].clk = NULL;

	for (i = 0; i < num_clks; i++) {
		clks[i].clk = of_clk_get(np, i);
		if (IS_ERR(clks[i].clk)) {
			ret = PTR_ERR(clks[i].clk);
			pr_err("%pOF: Failed to get clk index: %d ret: %d\n",
			       np, i, ret);
			clks[i].clk = NULL;
			goto err;
		}
	}

	return 0;

err:
	clk_bulk_put(i, clks);

	return ret;
}

static int __must_check of_clk_bulk_get_all(struct device_node *np,
					    struct clk_bulk_data **clks)
{
	struct clk_bulk_data *clk_bulk;
	int num_clks;
	int ret;

	num_clks = of_clk_get_parent_count(np);
	if (!num_clks)
		return 0;

	clk_bulk = kmalloc_array(num_clks, sizeof(*clk_bulk), GFP_KERNEL);
	if (!clk_bulk)
		return -ENOMEM;

	ret = of_clk_bulk_get(np, num_clks, clk_bulk);
	if (ret) {
		kfree(clk_bulk);
		return ret;
	}

	*clks = clk_bulk;

	return num_clks;
}

void clk_bulk_put(int num_clks, struct clk_bulk_data *clks)
{
	while (--num_clks >= 0) {
		clk_put(clks[num_clks].clk);
		clks[num_clks].clk = NULL;
	}
}
EXPORT_SYMBOL_GPL(clk_bulk_put);

static int __clk_bulk_get(struct device *dev, int num_clks,
			  struct clk_bulk_data *clks, bool optional)
{
	int ret;
	int i;

	for (i = 0; i < num_clks; i++)
		clks[i].clk = NULL;

	for (i = 0; i < num_clks; i++) {
		clks[i].clk = clk_get(dev, clks[i].id);
		if (IS_ERR(clks[i].clk)) {
			ret = PTR_ERR(clks[i].clk);
			clks[i].clk = NULL;

			if (ret == -ENOENT && optional)
				continue;

			if (ret != -EPROBE_DEFER)
				dev_err(dev, "Failed to get clk '%s': %d\n",
					clks[i].id, ret);
			goto err;
		}
	}

	return 0;

err:
	clk_bulk_put(i, clks);

	return ret;
}

int __must_check clk_bulk_get(struct device *dev, int num_clks,
			      struct clk_bulk_data *clks)
{
	return __clk_bulk_get(dev, num_clks, clks, false);
}
EXPORT_SYMBOL(clk_bulk_get);

int __must_check clk_bulk_get_optional(struct device *dev, int num_clks,
				       struct clk_bulk_data *clks)
{
	return __clk_bulk_get(dev, num_clks, clks, true);
}
EXPORT_SYMBOL_GPL(clk_bulk_get_optional);

void clk_bulk_put_all(int num_clks, struct clk_bulk_data *clks)
{
	if (IS_ERR_OR_NULL(clks))
		return;

	clk_bulk_put(num_clks, clks);

	kfree(clks);
}
EXPORT_SYMBOL(clk_bulk_put_all);

int __must_check clk_bulk_get_all(struct device *dev,
				  struct clk_bulk_data **clks)
{
	struct device_node *np = dev_of_node(dev);

	if (!np)
		return 0;

	return of_clk_bulk_get_all(np, clks);
}
EXPORT_SYMBOL(clk_bulk_get_all);

#ifdef CONFIG_HAVE_CLK_PREPARE

/**
 * clk_bulk_unprepare - undo preparation of a set of clock sources
 * @num_clks: the number of clk_bulk_data
 * @clks: the clk_bulk_data table being unprepared
 *
 * clk_bulk_unprepare may sleep, which differentiates it from clk_bulk_disable.
 * Returns 0 on success, -EERROR otherwise.
 */
void clk_bulk_unprepare(int num_clks, const struct clk_bulk_data *clks)
{
	while (--num_clks >= 0)
		clk_unprepare(clks[num_clks].clk);
}
EXPORT_SYMBOL_GPL(clk_bulk_unprepare);

/**
 * clk_bulk_prepare - prepare a set of clocks
 * @num_clks: the number of clk_bulk_data
 * @clks: the clk_bulk_data table being prepared
 *
 * clk_bulk_prepare may sleep, which differentiates it from clk_bulk_enable.
 * Returns 0 on success, -EERROR otherwise.
 */
int __must_check clk_bulk_prepare(int num_clks,
				  const struct clk_bulk_data *clks)
{
	int ret;
	int i;

	for (i = 0; i < num_clks; i++) {
		ret = clk_prepare(clks[i].clk);
		if (ret) {
			pr_err("Failed to prepare clk '%s': %d\n",
				clks[i].id, ret);
			goto err;
		}
	}

	return 0;

err:
	clk_bulk_unprepare(i, clks);

	return  ret;
}
EXPORT_SYMBOL_GPL(clk_bulk_prepare);

#endif /* CONFIG_HAVE_CLK_PREPARE */

/**
 * clk_bulk_disable - gate a set of clocks
 * @num_clks: the number of clk_bulk_data
 * @clks: the clk_bulk_data table being gated
 *
 * clk_bulk_disable must not sleep, which differentiates it from
 * clk_bulk_unprepare. clk_bulk_disable must be called before
 * clk_bulk_unprepare.
 */
void clk_bulk_disable(int num_clks, const struct clk_bulk_data *clks)
{

	while (--num_clks >= 0)
		clk_disable(clks[num_clks].clk);
}
EXPORT_SYMBOL_GPL(clk_bulk_disable);

/**
 * clk_bulk_enable - ungate a set of clocks
 * @num_clks: the number of clk_bulk_data
 * @clks: the clk_bulk_data table being ungated
 *
 * clk_bulk_enable must not sleep
 * Returns 0 on success, -EERROR otherwise.
 */
int __must_check clk_bulk_enable(int num_clks, const struct clk_bulk_data *clks)
{
	int ret;
	int i;

	for (i = 0; i < num_clks; i++) {
		ret = clk_enable(clks[i].clk);
		if (ret) {
			pr_err("Failed to enable clk '%s': %d\n",
				clks[i].id, ret);
			goto err;
		}
	}

	return 0;

err:
	clk_bulk_disable(i, clks);

	return  ret;
}
EXPORT_SYMBOL_GPL(clk_bulk_enable);
Commit	Line	Data
ebafb63d	1	// SPDX-License-Identifier: GPL-2.0
266e4e9d DA	2	/*
	3	* Copyright 2017 NXP
	4	*
	5	* Dong Aisheng <aisheng.dong@nxp.com>
266e4e9d DA	6	*/
	7
	8	#include <linux/clk.h>
616e45df	9	#include <linux/clk-provider.h>
266e4e9d DA	10	#include <linux/device.h>
266e4e9d DA	11	#include <linux/export.h>
cfdc0411	12	#include <linux/of.h>
616e45df	13	#include <linux/slab.h>
cfdc0411 DA	14
	15	static int __must_check of_clk_bulk_get(struct device_node *np, int num_clks,
	16	struct clk_bulk_data *clks)
	17	{
	18	int ret;
	19	int i;
	20
	21	for (i = 0; i < num_clks; i++)
	22	clks[i].clk = NULL;
	23
	24	for (i = 0; i < num_clks; i++) {
	25	clks[i].clk = of_clk_get(np, i);
	26	if (IS_ERR(clks[i].clk)) {
	27	ret = PTR_ERR(clks[i].clk);
	28	pr_err("%pOF: Failed to get clk index: %d ret: %d\n",
	29	np, i, ret);
	30	clks[i].clk = NULL;
	31	goto err;
	32	}
	33	}
	34
	35	return 0;
	36
	37	err:
	38	clk_bulk_put(i, clks);
	39
	40	return ret;
	41	}
266e4e9d	42
616e45df DA	43	static int __must_check of_clk_bulk_get_all(struct device_node *np,
	44	struct clk_bulk_data **clks)
	45	{
	46	struct clk_bulk_data *clk_bulk;
	47	int num_clks;
	48	int ret;
	49
	50	num_clks = of_clk_get_parent_count(np);
	51	if (!num_clks)
	52	return 0;
	53
	54	clk_bulk = kmalloc_array(num_clks, sizeof(*clk_bulk), GFP_KERNEL);
	55	if (!clk_bulk)
	56	return -ENOMEM;
	57
	58	ret = of_clk_bulk_get(np, num_clks, clk_bulk);
	59	if (ret) {
	60	kfree(clk_bulk);
	61	return ret;
	62	}
	63
	64	*clks = clk_bulk;
	65
	66	return num_clks;
	67	}
	68
266e4e9d DA	69	void clk_bulk_put(int num_clks, struct clk_bulk_data *clks)
	70	{
	71	while (--num_clks >= 0) {
	72	clk_put(clks[num_clks].clk);
	73	clks[num_clks].clk = NULL;
	74	}
	75	}
	76	EXPORT_SYMBOL_GPL(clk_bulk_put);
	77
2f25528e SN	78	static int __clk_bulk_get(struct device *dev, int num_clks,
2f25528e SN	79	struct clk_bulk_data *clks, bool optional)
266e4e9d DA	80	{
	81	int ret;
	82	int i;
	83
	84	for (i = 0; i < num_clks; i++)
	85	clks[i].clk = NULL;
	86
	87	for (i = 0; i < num_clks; i++) {
	88	clks[i].clk = clk_get(dev, clks[i].id);
	89	if (IS_ERR(clks[i].clk)) {
	90	ret = PTR_ERR(clks[i].clk);
2f25528e SN	91	clks[i].clk = NULL;
	92
	93	if (ret == -ENOENT && optional)
	94	continue;
	95
329470f2 JB	96	if (ret != -EPROBE_DEFER)
	97	dev_err(dev, "Failed to get clk '%s': %d\n",
	98	clks[i].id, ret);
266e4e9d DA	99	goto err;
	100	}
	101	}
	102
	103	return 0;
	104
	105	err:
	106	clk_bulk_put(i, clks);
	107
	108	return ret;
	109	}
2f25528e SN	110
	111	int __must_check clk_bulk_get(struct device *dev, int num_clks,
	112	struct clk_bulk_data *clks)
	113	{
	114	return __clk_bulk_get(dev, num_clks, clks, false);
	115	}
266e4e9d DA	116	EXPORT_SYMBOL(clk_bulk_get);
266e4e9d DA	117
2f25528e SN	118	int __must_check clk_bulk_get_optional(struct device *dev, int num_clks,
	119	struct clk_bulk_data *clks)
	120	{
	121	return __clk_bulk_get(dev, num_clks, clks, true);
	122	}
	123	EXPORT_SYMBOL_GPL(clk_bulk_get_optional);
	124
616e45df DA	125	void clk_bulk_put_all(int num_clks, struct clk_bulk_data *clks)
	126	{
	127	if (IS_ERR_OR_NULL(clks))
	128	return;
	129
	130	clk_bulk_put(num_clks, clks);
	131
	132	kfree(clks);
	133	}
	134	EXPORT_SYMBOL(clk_bulk_put_all);
	135
	136	int __must_check clk_bulk_get_all(struct device *dev,
	137	struct clk_bulk_data **clks)
	138	{
	139	struct device_node *np = dev_of_node(dev);
	140
	141	if (!np)
	142	return 0;
	143
	144	return of_clk_bulk_get_all(np, clks);
	145	}
	146	EXPORT_SYMBOL(clk_bulk_get_all);
	147
266e4e9d DA	148	#ifdef CONFIG_HAVE_CLK_PREPARE
	149
	150	/**
	151	* clk_bulk_unprepare - undo preparation of a set of clock sources
	152	* @num_clks: the number of clk_bulk_data
	153	* @clks: the clk_bulk_data table being unprepared
	154	*
	155	* clk_bulk_unprepare may sleep, which differentiates it from clk_bulk_disable.
	156	* Returns 0 on success, -EERROR otherwise.
	157	*/
	158	void clk_bulk_unprepare(int num_clks, const struct clk_bulk_data *clks)
	159	{
	160	while (--num_clks >= 0)
	161	clk_unprepare(clks[num_clks].clk);
	162	}
	163	EXPORT_SYMBOL_GPL(clk_bulk_unprepare);
	164
	165	/**
	166	* clk_bulk_prepare - prepare a set of clocks
	167	* @num_clks: the number of clk_bulk_data
	168	* @clks: the clk_bulk_data table being prepared
	169	*
	170	* clk_bulk_prepare may sleep, which differentiates it from clk_bulk_enable.
	171	* Returns 0 on success, -EERROR otherwise.
	172	*/
	173	int __must_check clk_bulk_prepare(int num_clks,
	174	const struct clk_bulk_data *clks)
	175	{
	176	int ret;
	177	int i;
	178
	179	for (i = 0; i < num_clks; i++) {
	180	ret = clk_prepare(clks[i].clk);
	181	if (ret) {
	182	pr_err("Failed to prepare clk '%s': %d\n",
	183	clks[i].id, ret);
	184	goto err;
	185	}
	186	}
	187
	188	return 0;
	189
	190	err:
	191	clk_bulk_unprepare(i, clks);
	192
	193	return ret;
	194	}
9792bf5a	195	EXPORT_SYMBOL_GPL(clk_bulk_prepare);
266e4e9d DA	196
	197	#endif /* CONFIG_HAVE_CLK_PREPARE */
	198
	199	/**
	200	* clk_bulk_disable - gate a set of clocks
	201	* @num_clks: the number of clk_bulk_data
	202	* @clks: the clk_bulk_data table being gated
	203	*
	204	* clk_bulk_disable must not sleep, which differentiates it from
	205	* clk_bulk_unprepare. clk_bulk_disable must be called before
	206	* clk_bulk_unprepare.
	207	*/
	208	void clk_bulk_disable(int num_clks, const struct clk_bulk_data *clks)
	209	{
	210
	211	while (--num_clks >= 0)
	212	clk_disable(clks[num_clks].clk);
	213	}
	214	EXPORT_SYMBOL_GPL(clk_bulk_disable);
	215
	216	/**
	217	* clk_bulk_enable - ungate a set of clocks
	218	* @num_clks: the number of clk_bulk_data
	219	* @clks: the clk_bulk_data table being ungated
	220	*
	221	* clk_bulk_enable must not sleep
	222	* Returns 0 on success, -EERROR otherwise.
	223	*/
	224	int __must_check clk_bulk_enable(int num_clks, const struct clk_bulk_data *clks)
	225	{
	226	int ret;
	227	int i;
	228
	229	for (i = 0; i < num_clks; i++) {
	230	ret = clk_enable(clks[i].clk);
	231	if (ret) {
	232	pr_err("Failed to enable clk '%s': %d\n",
	233	clks[i].id, ret);
	234	goto err;
	235	}
	236	}
	237
	238	return 0;
	239
	240	err:
	241	clk_bulk_disable(i, clks);
	242
	243	return ret;
	244	}
	245	EXPORT_SYMBOL_GPL(clk_bulk_enable);