[linux-block.git] / drivers / clk / clk-fixed-factor.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2011 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
 */
#include <linux/module.h>
#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>

/*
 * DOC: basic fixed multiplier and divider clock that cannot gate
 *
 * Traits of this clock:
 * prepare - clk_prepare only ensures that parents are prepared
 * enable - clk_enable only ensures that parents are enabled
 * rate - rate is fixed.  clk->rate = parent->rate / div * mult
 * parent - fixed parent.  No clk_set_parent support
 */

static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
		unsigned long parent_rate)
{
	struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
	unsigned long long int rate;

	rate = (unsigned long long int)parent_rate * fix->mult;
	do_div(rate, fix->div);
	return (unsigned long)rate;
}

static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
				unsigned long *prate)
{
	struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);

	if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) {
		unsigned long best_parent;

		best_parent = (rate / fix->mult) * fix->div;
		*prate = clk_hw_round_rate(clk_hw_get_parent(hw), best_parent);
	}

	return (*prate / fix->div) * fix->mult;
}

static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
				unsigned long parent_rate)
{
	/*
	 * We must report success but we can do so unconditionally because
	 * clk_factor_round_rate returns values that ensure this call is a
	 * nop.
	 */

	return 0;
}

const struct clk_ops clk_fixed_factor_ops = {
	.round_rate = clk_factor_round_rate,
	.set_rate = clk_factor_set_rate,
	.recalc_rate = clk_factor_recalc_rate,
};
EXPORT_SYMBOL_GPL(clk_fixed_factor_ops);

static void devm_clk_hw_register_fixed_factor_release(struct device *dev, void *res)
{
	struct clk_fixed_factor *fix = res;

	/*
	 * We can not use clk_hw_unregister_fixed_factor, since it will kfree()
	 * the hw, resulting in double free. Just unregister the hw and let
	 * devres code kfree() it.
	 */
	clk_hw_unregister(&fix->hw);
}

static struct clk_hw *
__clk_hw_register_fixed_factor(struct device *dev, struct device_node *np,
		const char *name, const char *parent_name,
		const struct clk_hw *parent_hw, int index,
		unsigned long flags, unsigned int mult, unsigned int div,
		bool devm)
{
	struct clk_fixed_factor *fix;
	struct clk_init_data init = { };
	struct clk_parent_data pdata = { .index = index };
	struct clk_hw *hw;
	int ret;

	/* You can't use devm without a dev */
	if (devm && !dev)
		return ERR_PTR(-EINVAL);

	if (devm)
		fix = devres_alloc(devm_clk_hw_register_fixed_factor_release,
				sizeof(*fix), GFP_KERNEL);
	else
		fix = kmalloc(sizeof(*fix), GFP_KERNEL);
	if (!fix)
		return ERR_PTR(-ENOMEM);

	/* struct clk_fixed_factor assignments */
	fix->mult = mult;
	fix->div = div;
	fix->hw.init = &init;

	init.name = name;
	init.ops = &clk_fixed_factor_ops;
	init.flags = flags;
	if (parent_name)
		init.parent_names = &parent_name;
	else if (parent_hw)
		init.parent_hws = &parent_hw;
	else
		init.parent_data = &pdata;
	init.num_parents = 1;

	hw = &fix->hw;
	if (dev)
		ret = clk_hw_register(dev, hw);
	else
		ret = of_clk_hw_register(np, hw);
	if (ret) {
		if (devm)
			devres_free(fix);
		else
			kfree(fix);
		hw = ERR_PTR(ret);
	} else if (devm)
		devres_add(dev, fix);

	return hw;
}

/**
 * devm_clk_hw_register_fixed_factor_index - Register a fixed factor clock with
 * parent from DT index
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @index: index of phandle in @dev 'clocks' property
 * @flags: fixed factor flags
 * @mult: multiplier
 * @div: divider
 *
 * Return: Pointer to fixed factor clk_hw structure that was registered or
 * an error pointer.
 */
struct clk_hw *devm_clk_hw_register_fixed_factor_index(struct device *dev,
		const char *name, unsigned int index, unsigned long flags,
		unsigned int mult, unsigned int div)
{
	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, NULL, index,
					      flags, mult, div, true);
}
EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_index);

/**
 * devm_clk_hw_register_fixed_factor_parent_hw - Register a fixed factor clock with
 * pointer to parent clock
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_hw: pointer to parent clk
 * @flags: fixed factor flags
 * @mult: multiplier
 * @div: divider
 *
 * Return: Pointer to fixed factor clk_hw structure that was registered or
 * an error pointer.
 */
struct clk_hw *devm_clk_hw_register_fixed_factor_parent_hw(struct device *dev,
		const char *name, const struct clk_hw *parent_hw,
		unsigned long flags, unsigned int mult, unsigned int div)
{
	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, parent_hw,
					      -1, flags, mult, div, true);
}
EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_parent_hw);

struct clk_hw *clk_hw_register_fixed_factor_parent_hw(struct device *dev,
		const char *name, const struct clk_hw *parent_hw,
		unsigned long flags, unsigned int mult, unsigned int div)
{
	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL,
					      parent_hw, -1, flags, mult, div,
					      false);
}
EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor_parent_hw);

struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
		const char *name, const char *parent_name, unsigned long flags,
		unsigned int mult, unsigned int div)
{
	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1,
					      flags, mult, div, false);
}
EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor);

struct clk *clk_register_fixed_factor(struct device *dev, const char *name,
		const char *parent_name, unsigned long flags,
		unsigned int mult, unsigned int div)
{
	struct clk_hw *hw;

	hw = clk_hw_register_fixed_factor(dev, name, parent_name, flags, mult,
					  div);
	if (IS_ERR(hw))
		return ERR_CAST(hw);
	return hw->clk;
}
EXPORT_SYMBOL_GPL(clk_register_fixed_factor);

void clk_unregister_fixed_factor(struct clk *clk)
{
	struct clk_hw *hw;

	hw = __clk_get_hw(clk);
	if (!hw)
		return;

	clk_unregister(clk);
	kfree(to_clk_fixed_factor(hw));
}
EXPORT_SYMBOL_GPL(clk_unregister_fixed_factor);

void clk_hw_unregister_fixed_factor(struct clk_hw *hw)
{
	struct clk_fixed_factor *fix;

	fix = to_clk_fixed_factor(hw);

	clk_hw_unregister(hw);
	kfree(fix);
}
EXPORT_SYMBOL_GPL(clk_hw_unregister_fixed_factor);

struct clk_hw *devm_clk_hw_register_fixed_factor(struct device *dev,
		const char *name, const char *parent_name, unsigned long flags,
		unsigned int mult, unsigned int div)
{
	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1,
			flags, mult, div, true);
}
EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor);

#ifdef CONFIG_OF
static struct clk_hw *_of_fixed_factor_clk_setup(struct device_node *node)
{
	struct clk_hw *hw;
	const char *clk_name = node->name;
	u32 div, mult;
	int ret;

	if (of_property_read_u32(node, "clock-div", &div)) {
		pr_err("%s Fixed factor clock <%pOFn> must have a clock-div property\n",
			__func__, node);
		return ERR_PTR(-EIO);
	}

	if (of_property_read_u32(node, "clock-mult", &mult)) {
		pr_err("%s Fixed factor clock <%pOFn> must have a clock-mult property\n",
			__func__, node);
		return ERR_PTR(-EIO);
	}

	of_property_read_string(node, "clock-output-names", &clk_name);

	hw = __clk_hw_register_fixed_factor(NULL, node, clk_name, NULL, NULL, 0,
					    0, mult, div, false);
	if (IS_ERR(hw)) {
		/*
		 * Clear OF_POPULATED flag so that clock registration can be
		 * attempted again from probe function.
		 */
		of_node_clear_flag(node, OF_POPULATED);
		return ERR_CAST(hw);
	}

	ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, hw);
	if (ret) {
		clk_hw_unregister_fixed_factor(hw);
		return ERR_PTR(ret);
	}

	return hw;
}

/**
 * of_fixed_factor_clk_setup() - Setup function for simple fixed factor clock
 * @node:	device node for the clock
 */
void __init of_fixed_factor_clk_setup(struct device_node *node)
{
	_of_fixed_factor_clk_setup(node);
}
CLK_OF_DECLARE(fixed_factor_clk, "fixed-factor-clock",
		of_fixed_factor_clk_setup);

static void of_fixed_factor_clk_remove(struct platform_device *pdev)
{
	struct clk_hw *clk = platform_get_drvdata(pdev);

	of_clk_del_provider(pdev->dev.of_node);
	clk_hw_unregister_fixed_factor(clk);
}

static int of_fixed_factor_clk_probe(struct platform_device *pdev)
{
	struct clk_hw *clk;

	/*
	 * This function is not executed when of_fixed_factor_clk_setup
	 * succeeded.
	 */
	clk = _of_fixed_factor_clk_setup(pdev->dev.of_node);
	if (IS_ERR(clk))
		return PTR_ERR(clk);

	platform_set_drvdata(pdev, clk);

	return 0;
}

static const struct of_device_id of_fixed_factor_clk_ids[] = {
	{ .compatible = "fixed-factor-clock" },
	{ }
};
MODULE_DEVICE_TABLE(of, of_fixed_factor_clk_ids);

static struct platform_driver of_fixed_factor_clk_driver = {
	.driver = {
		.name = "of_fixed_factor_clk",
		.of_match_table = of_fixed_factor_clk_ids,
	},
	.probe = of_fixed_factor_clk_probe,
	.remove_new = of_fixed_factor_clk_remove,
};
builtin_platform_driver(of_fixed_factor_clk_driver);
#endif
Commit	Line	Data
e1bd55e5	1	// SPDX-License-Identifier: GPL-2.0
f0948f59 SH	2	/*
f0948f59 SH	3	* Copyright (C) 2011 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
f0948f59 SH	4	*/
	5	#include <linux/module.h>
	6	#include <linux/clk-provider.h>
	7	#include <linux/slab.h>
	8	#include <linux/err.h>
79b16641	9	#include <linux/of.h>
971451b3	10	#include <linux/platform_device.h>
f0948f59 SH	11
	12	/*
	13	* DOC: basic fixed multiplier and divider clock that cannot gate
	14	*
	15	* Traits of this clock:
	16	* prepare - clk_prepare only ensures that parents are prepared
	17	* enable - clk_enable only ensures that parents are enabled
	18	* rate - rate is fixed. clk->rate = parent->rate / div * mult
	19	* parent - fixed parent. No clk_set_parent support
	20	*/
	21
f0948f59 SH	22	static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
	23	unsigned long parent_rate)
	24	{
	25	struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
bab53301	26	unsigned long long int rate;
f0948f59	27
bab53301 HZ	28	rate = (unsigned long long int)parent_rate * fix->mult;
	29	do_div(rate, fix->div);
	30	return (unsigned long)rate;
f0948f59 SH	31	}
	32
	33	static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
	34	unsigned long *prate)
	35	{
	36	struct clk_fixed_factor *fix = to_clk_fixed_factor(hw);
	37
98d8a60e	38	if (clk_hw_get_flags(hw) & CLK_SET_RATE_PARENT) {
f0948f59 SH	39	unsigned long best_parent;
	40
	41	best_parent = (rate / fix->mult) * fix->div;
2f508a95	42	*prate = clk_hw_round_rate(clk_hw_get_parent(hw), best_parent);
f0948f59 SH	43	}
	44
	45	return (prate / fix->div) fix->mult;
	46	}
	47
	48	static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
	49	unsigned long parent_rate)
	50	{
3037e9ea DT	51	/*
	52	* We must report success but we can do so unconditionally because
	53	* clk_factor_round_rate returns values that ensure this call is a
	54	* nop.
	55	*/
	56
f0948f59 SH	57	return 0;
	58	}
	59
3037e9ea	60	const struct clk_ops clk_fixed_factor_ops = {
f0948f59 SH	61	.round_rate = clk_factor_round_rate,
	62	.set_rate = clk_factor_set_rate,
	63	.recalc_rate = clk_factor_recalc_rate,
	64	};
	65	EXPORT_SYMBOL_GPL(clk_fixed_factor_ops);
	66
0b9266d2 DP	67	static void devm_clk_hw_register_fixed_factor_release(struct device dev, void res)
0b9266d2 DP	68	{
50ce6826 DB	69	struct clk_fixed_factor *fix = res;
	70
	71	/*
	72	* We can not use clk_hw_unregister_fixed_factor, since it will kfree()
	73	* the hw, resulting in double free. Just unregister the hw and let
	74	* devres code kfree() it.
	75	*/
	76	clk_hw_unregister(&fix->hw);
0b9266d2 DP	77	}
0b9266d2 DP	78
ecbf3f17 SB	79	static struct clk_hw *
ecbf3f17 SB	80	__clk_hw_register_fixed_factor(struct device dev, struct device_node np,
6ebd5247 MS	81	const char name, const char parent_name,
6ebd5247 MS	82	const struct clk_hw *parent_hw, int index,
0b9266d2 DP	83	unsigned long flags, unsigned int mult, unsigned int div,
0b9266d2 DP	84	bool devm)
f0948f59 SH	85	{
f0948f59 SH	86	struct clk_fixed_factor *fix;
e4818d61	87	struct clk_init_data init = { };
ecbf3f17	88	struct clk_parent_data pdata = { .index = index };
0759ac8a SB	89	struct clk_hw *hw;
0759ac8a SB	90	int ret;
f0948f59	91
0b9266d2 DP	92	/* You can't use devm without a dev */
	93	if (devm && !dev)
	94	return ERR_PTR(-EINVAL);
	95
	96	if (devm)
	97	fix = devres_alloc(devm_clk_hw_register_fixed_factor_release,
	98	sizeof(*fix), GFP_KERNEL);
	99	else
	100	fix = kmalloc(sizeof(*fix), GFP_KERNEL);
d122db7e	101	if (!fix)
f0948f59	102	return ERR_PTR(-ENOMEM);
f0948f59 SH	103
	104	/* struct clk_fixed_factor assignments */
	105	fix->mult = mult;
	106	fix->div = div;
	107	fix->hw.init = &init;
	108
	109	init.name = name;
	110	init.ops = &clk_fixed_factor_ops;
90b6c5c7	111	init.flags = flags;
ecbf3f17 SB	112	if (parent_name)
ecbf3f17 SB	113	init.parent_names = &parent_name;
6ebd5247 MS	114	else if (parent_hw)
6ebd5247 MS	115	init.parent_hws = &parent_hw;
ecbf3f17 SB	116	else
ecbf3f17 SB	117	init.parent_data = &pdata;
f0948f59 SH	118	init.num_parents = 1;
f0948f59 SH	119
0759ac8a	120	hw = &fix->hw;
ecbf3f17 SB	121	if (dev)
	122	ret = clk_hw_register(dev, hw);
	123	else
	124	ret = of_clk_hw_register(np, hw);
0759ac8a	125	if (ret) {
0b9266d2 DP	126	if (devm)
	127	devres_free(fix);
	128	else
	129	kfree(fix);
0759ac8a	130	hw = ERR_PTR(ret);
0b9266d2 DP	131	} else if (devm)
0b9266d2 DP	132	devres_add(dev, fix);
f0948f59	133
0759ac8a SB	134	return hw;
0759ac8a SB	135	}
ecbf3f17	136
0c125f87 MV	137	/**
	138	* devm_clk_hw_register_fixed_factor_index - Register a fixed factor clock with
	139	* parent from DT index
	140	* @dev: device that is registering this clock
	141	* @name: name of this clock
	142	* @index: index of phandle in @dev 'clocks' property
	143	* @flags: fixed factor flags
	144	* @mult: multiplier
	145	* @div: divider
	146	*
	147	* Return: Pointer to fixed factor clk_hw structure that was registered or
	148	* an error pointer.
	149	*/
	150	struct clk_hw devm_clk_hw_register_fixed_factor_index(struct device dev,
	151	const char *name, unsigned int index, unsigned long flags,
	152	unsigned int mult, unsigned int div)
	153	{
6ebd5247	154	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, NULL, index,
0c125f87 MV	155	flags, mult, div, true);
	156	}
	157	EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_index);
	158
6ebd5247 MS	159	/**
	160	* devm_clk_hw_register_fixed_factor_parent_hw - Register a fixed factor clock with
	161	* pointer to parent clock
	162	* @dev: device that is registering this clock
	163	* @name: name of this clock
	164	* @parent_hw: pointer to parent clk
	165	* @flags: fixed factor flags
	166	* @mult: multiplier
	167	* @div: divider
	168	*
	169	* Return: Pointer to fixed factor clk_hw structure that was registered or
	170	* an error pointer.
	171	*/
	172	struct clk_hw devm_clk_hw_register_fixed_factor_parent_hw(struct device dev,
	173	const char name, const struct clk_hw parent_hw,
	174	unsigned long flags, unsigned int mult, unsigned int div)
	175	{
	176	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL, parent_hw,
	177	-1, flags, mult, div, true);
	178	}
	179	EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor_parent_hw);
	180
	181	struct clk_hw clk_hw_register_fixed_factor_parent_hw(struct device dev,
	182	const char name, const struct clk_hw parent_hw,
	183	unsigned long flags, unsigned int mult, unsigned int div)
	184	{
	185	return __clk_hw_register_fixed_factor(dev, NULL, name, NULL,
	186	parent_hw, -1, flags, mult, div,
	187	false);
	188	}
	189	EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor_parent_hw);
	190
ecbf3f17 SB	191	struct clk_hw clk_hw_register_fixed_factor(struct device dev,
	192	const char name, const char parent_name, unsigned long flags,
	193	unsigned int mult, unsigned int div)
	194	{
6ebd5247	195	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1,
0b9266d2	196	flags, mult, div, false);
ecbf3f17	197	}
0759ac8a SB	198	EXPORT_SYMBOL_GPL(clk_hw_register_fixed_factor);
	199
	200	struct clk clk_register_fixed_factor(struct device dev, const char *name,
	201	const char *parent_name, unsigned long flags,
	202	unsigned int mult, unsigned int div)
	203	{
	204	struct clk_hw *hw;
	205
	206	hw = clk_hw_register_fixed_factor(dev, name, parent_name, flags, mult,
	207	div);
	208	if (IS_ERR(hw))
	209	return ERR_CAST(hw);
	210	return hw->clk;
f0948f59	211	}
5cfe10bb	212	EXPORT_SYMBOL_GPL(clk_register_fixed_factor);
cbf9591f MY	213
	214	void clk_unregister_fixed_factor(struct clk *clk)
	215	{
	216	struct clk_hw *hw;
	217
	218	hw = __clk_get_hw(clk);
	219	if (!hw)
	220	return;
	221
	222	clk_unregister(clk);
	223	kfree(to_clk_fixed_factor(hw));
	224	}
	225	EXPORT_SYMBOL_GPL(clk_unregister_fixed_factor);
0759ac8a SB	226
	227	void clk_hw_unregister_fixed_factor(struct clk_hw *hw)
	228	{
	229	struct clk_fixed_factor *fix;
	230
	231	fix = to_clk_fixed_factor(hw);
	232
	233	clk_hw_unregister(hw);
	234	kfree(fix);
	235	}
	236	EXPORT_SYMBOL_GPL(clk_hw_unregister_fixed_factor);
5cfe10bb	237
0b9266d2 DP	238	struct clk_hw devm_clk_hw_register_fixed_factor(struct device dev,
	239	const char name, const char parent_name, unsigned long flags,
	240	unsigned int mult, unsigned int div)
	241	{
6ebd5247	242	return __clk_hw_register_fixed_factor(dev, NULL, name, parent_name, NULL, -1,
0b9266d2 DP	243	flags, mult, div, true);
	244	}
	245	EXPORT_SYMBOL_GPL(devm_clk_hw_register_fixed_factor);
	246
79b16641	247	#ifdef CONFIG_OF
ecbf3f17	248	static struct clk_hw _of_fixed_factor_clk_setup(struct device_node node)
79b16641	249	{
ecbf3f17	250	struct clk_hw *hw;
79b16641	251	const char *clk_name = node->name;
79b16641	252	u32 div, mult;
971451b3	253	int ret;
79b16641 GC	254
79b16641 GC	255	if (of_property_read_u32(node, "clock-div", &div)) {
e665f029 RH	256	pr_err("%s Fixed factor clock <%pOFn> must have a clock-div property\n",
e665f029 RH	257	__func__, node);
971451b3	258	return ERR_PTR(-EIO);
79b16641 GC	259	}
	260
	261	if (of_property_read_u32(node, "clock-mult", &mult)) {
e665f029 RH	262	pr_err("%s Fixed factor clock <%pOFn> must have a clock-mult property\n",
e665f029 RH	263	__func__, node);
971451b3	264	return ERR_PTR(-EIO);
79b16641 GC	265	}
	266
	267	of_property_read_string(node, "clock-output-names", &clk_name);
79b16641	268
6ebd5247	269	hw = __clk_hw_register_fixed_factor(NULL, node, clk_name, NULL, NULL, 0,
c33ed612	270	0, mult, div, false);
ecbf3f17	271	if (IS_ERR(hw)) {
f6dab423	272	/*
f6dab423 RV	273	* Clear OF_POPULATED flag so that clock registration can be
	274	* attempted again from probe function.
	275	*/
	276	of_node_clear_flag(node, OF_POPULATED);
ecbf3f17	277	return ERR_CAST(hw);
f6dab423	278	}
971451b3	279
ecbf3f17	280	ret = of_clk_add_hw_provider(node, of_clk_hw_simple_get, hw);
971451b3	281	if (ret) {
ecbf3f17	282	clk_hw_unregister_fixed_factor(hw);
971451b3 RRD	283	return ERR_PTR(ret);
	284	}
	285
ecbf3f17	286	return hw;
971451b3 RRD	287	}
	288
	289	/**
	290	* of_fixed_factor_clk_setup() - Setup function for simple fixed factor clock
52ba4fa4	291	* @node: device node for the clock
971451b3 RRD	292	*/
	293	void __init of_fixed_factor_clk_setup(struct device_node *node)
	294	{
	295	_of_fixed_factor_clk_setup(node);
79b16641	296	}
79b16641 GC	297	CLK_OF_DECLARE(fixed_factor_clk, "fixed-factor-clock",
79b16641 GC	298	of_fixed_factor_clk_setup);
971451b3	299
27237f4b	300	static void of_fixed_factor_clk_remove(struct platform_device *pdev)
971451b3	301	{
ecbf3f17	302	struct clk_hw *clk = platform_get_drvdata(pdev);
971451b3	303
f98e8a57	304	of_clk_del_provider(pdev->dev.of_node);
ecbf3f17	305	clk_hw_unregister_fixed_factor(clk);
971451b3 RRD	306	}
	307
	308	static int of_fixed_factor_clk_probe(struct platform_device *pdev)
	309	{
ecbf3f17	310	struct clk_hw *clk;
971451b3 RRD	311
	312	/*
	313	* This function is not executed when of_fixed_factor_clk_setup
	314	* succeeded.
	315	*/
	316	clk = _of_fixed_factor_clk_setup(pdev->dev.of_node);
	317	if (IS_ERR(clk))
	318	return PTR_ERR(clk);
	319
	320	platform_set_drvdata(pdev, clk);
	321
	322	return 0;
	323	}
	324
	325	static const struct of_device_id of_fixed_factor_clk_ids[] = {
	326	{ .compatible = "fixed-factor-clock" },
	327	{ }
	328	};
	329	MODULE_DEVICE_TABLE(of, of_fixed_factor_clk_ids);
	330
	331	static struct platform_driver of_fixed_factor_clk_driver = {
	332	.driver = {
	333	.name = "of_fixed_factor_clk",
	334	.of_match_table = of_fixed_factor_clk_ids,
	335	},
	336	.probe = of_fixed_factor_clk_probe,
27237f4b	337	.remove_new = of_fixed_factor_clk_remove,
971451b3 RRD	338	};
971451b3 RRD	339	builtin_platform_driver(of_fixed_factor_clk_driver);
79b16641	340	#endif