[deliverable/linux.git] / drivers / clk / clk-gpio.c

/*
 * Copyright (C) 2013 - 2014 Texas Instruments Incorporated - http://www.ti.com
 *
 * Authors:
 *    Jyri Sarha <jsarha@ti.com>
 *    Sergej Sawazki <ce3a@gmx.de>
 *
 * 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.
 *
 * Gpio controlled clock implementation
 */

#include <linux/clk-provider.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/gpio/consumer.h>
#include <linux/of_gpio.h>
#include <linux/err.h>
#include <linux/device.h>

/**
 * DOC: basic gpio gated clock which can be enabled and disabled
 *      with gpio output
 * Traits of this clock:
 * prepare - clk_(un)prepare only ensures parent is (un)prepared
 * enable - clk_enable and clk_disable are functional & control gpio
 * rate - inherits rate from parent.  No clk_set_rate support
 * parent - fixed parent.  No clk_set_parent support
 */

#define to_clk_gpio(_hw) container_of(_hw, struct clk_gpio, hw)

static int clk_gpio_gate_enable(struct clk_hw *hw)
{
	struct clk_gpio *clk = to_clk_gpio(hw);

	gpiod_set_value(clk->gpiod, 1);

	return 0;
}

static void clk_gpio_gate_disable(struct clk_hw *hw)
{
	struct clk_gpio *clk = to_clk_gpio(hw);

	gpiod_set_value(clk->gpiod, 0);
}

static int clk_gpio_gate_is_enabled(struct clk_hw *hw)
{
	struct clk_gpio *clk = to_clk_gpio(hw);

	return gpiod_get_value(clk->gpiod);
}

const struct clk_ops clk_gpio_gate_ops = {
	.enable = clk_gpio_gate_enable,
	.disable = clk_gpio_gate_disable,
	.is_enabled = clk_gpio_gate_is_enabled,
};
EXPORT_SYMBOL_GPL(clk_gpio_gate_ops);

/**
 * DOC: basic clock multiplexer which can be controlled with a gpio output
 * Traits of this clock:
 * prepare - clk_prepare only ensures that parents are prepared
 * rate - rate is only affected by parent switching.  No clk_set_rate support
 * parent - parent is adjustable through clk_set_parent
 */

static u8 clk_gpio_mux_get_parent(struct clk_hw *hw)
{
	struct clk_gpio *clk = to_clk_gpio(hw);

	return gpiod_get_value(clk->gpiod);
}

static int clk_gpio_mux_set_parent(struct clk_hw *hw, u8 index)
{
	struct clk_gpio *clk = to_clk_gpio(hw);

	gpiod_set_value(clk->gpiod, index);

	return 0;
}

const struct clk_ops clk_gpio_mux_ops = {
	.get_parent = clk_gpio_mux_get_parent,
	.set_parent = clk_gpio_mux_set_parent,
	.determine_rate = __clk_mux_determine_rate,
};
EXPORT_SYMBOL_GPL(clk_gpio_mux_ops);

static struct clk *clk_register_gpio(struct device *dev, const char *name,
		const char * const *parent_names, u8 num_parents, unsigned gpio,
		bool active_low, unsigned long flags,
		const struct clk_ops *clk_gpio_ops)
{
	struct clk_gpio *clk_gpio;
	struct clk *clk;
	struct clk_init_data init = {};
	unsigned long gpio_flags;
	int err;

	if (dev)
		clk_gpio = devm_kzalloc(dev, sizeof(*clk_gpio),	GFP_KERNEL);
	else
		clk_gpio = kzalloc(sizeof(*clk_gpio), GFP_KERNEL);

	if (!clk_gpio)
		return ERR_PTR(-ENOMEM);

	if (active_low)
		gpio_flags = GPIOF_ACTIVE_LOW | GPIOF_OUT_INIT_HIGH;
	else
		gpio_flags = GPIOF_OUT_INIT_LOW;

	if (dev)
		err = devm_gpio_request_one(dev, gpio, gpio_flags, name);
	else
		err = gpio_request_one(gpio, gpio_flags, name);
	if (err) {
		if (err != -EPROBE_DEFER)
			pr_err("%s: %s: Error requesting clock control gpio %u\n",
					__func__, name, gpio);
		if (!dev)
			kfree(clk_gpio);

		return ERR_PTR(err);
	}

	init.name = name;
	init.ops = clk_gpio_ops;
	init.flags = flags | CLK_IS_BASIC;
	init.parent_names = parent_names;
	init.num_parents = num_parents;

	clk_gpio->gpiod = gpio_to_desc(gpio);
	clk_gpio->hw.init = &init;

	if (dev)
		clk = devm_clk_register(dev, &clk_gpio->hw);
	else
		clk = clk_register(NULL, &clk_gpio->hw);

	if (!IS_ERR(clk))
		return clk;

	if (!dev) {
		gpiod_put(clk_gpio->gpiod);
		kfree(clk_gpio);
	}

	return clk;
}

/**
 * clk_register_gpio_gate - register a gpio clock gate with the clock framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_name: name of this clock's parent
 * @gpio: gpio number to gate this clock
 * @active_low: true if gpio should be set to 0 to enable clock
 * @flags: clock flags
 */
struct clk *clk_register_gpio_gate(struct device *dev, const char *name,
		const char *parent_name, unsigned gpio, bool active_low,
		unsigned long flags)
{
	return clk_register_gpio(dev, name,
			(parent_name ? &parent_name : NULL),
			(parent_name ? 1 : 0), gpio, active_low, flags,
			&clk_gpio_gate_ops);
}
EXPORT_SYMBOL_GPL(clk_register_gpio_gate);

/**
 * clk_register_gpio_mux - register a gpio clock mux with the clock framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_names: names of this clock's parents
 * @num_parents: number of parents listed in @parent_names
 * @gpio: gpio number to gate this clock
 * @active_low: true if gpio should be set to 0 to enable clock
 * @flags: clock flags
 */
struct clk *clk_register_gpio_mux(struct device *dev, const char *name,
		const char * const *parent_names, u8 num_parents, unsigned gpio,
		bool active_low, unsigned long flags)
{
	if (num_parents != 2) {
		pr_err("mux-clock %s must have 2 parents\n", name);
		return ERR_PTR(-EINVAL);
	}

	return clk_register_gpio(dev, name, parent_names, num_parents,
			gpio, active_low, flags, &clk_gpio_mux_ops);
}
EXPORT_SYMBOL_GPL(clk_register_gpio_mux);

#ifdef CONFIG_OF
/**
 * clk_register_get() has to be delayed, because -EPROBE_DEFER
 * can not be handled properly at of_clk_init() call time.
 */

struct clk_gpio_delayed_register_data {
	const char *gpio_name;
	int num_parents;
	const char **parent_names;
	struct device_node *node;
	struct mutex lock;
	struct clk *clk;
	struct clk *(*clk_register_get)(const char *name,
			const char * const *parent_names, u8 num_parents,
			unsigned gpio, bool active_low);
};

static struct clk *of_clk_gpio_delayed_register_get(
		struct of_phandle_args *clkspec, void *_data)
{
	struct clk_gpio_delayed_register_data *data = _data;
	struct clk *clk;
	int gpio;
	enum of_gpio_flags of_flags;

	mutex_lock(&data->lock);

	if (data->clk) {
		mutex_unlock(&data->lock);
		return data->clk;
	}

	gpio = of_get_named_gpio_flags(data->node, data->gpio_name, 0,
			&of_flags);
	if (gpio < 0) {
		mutex_unlock(&data->lock);
		if (gpio == -EPROBE_DEFER)
			pr_debug("%s: %s: GPIOs not yet available, retry later\n",
					data->node->name, __func__);
		else
			pr_err("%s: %s: Can't get '%s' DT property\n",
					data->node->name, __func__,
					data->gpio_name);
		return ERR_PTR(gpio);
	}

	clk = data->clk_register_get(data->node->name, data->parent_names,
			data->num_parents, gpio, of_flags & OF_GPIO_ACTIVE_LOW);
	if (IS_ERR(clk))
		goto out;

	data->clk = clk;
out:
	mutex_unlock(&data->lock);

	return clk;
}

static struct clk *of_clk_gpio_gate_delayed_register_get(const char *name,
		const char * const *parent_names, u8 num_parents,
		unsigned gpio, bool active_low)
{
	return clk_register_gpio_gate(NULL, name, parent_names ?
			parent_names[0] : NULL, gpio, active_low, 0);
}

static struct clk *of_clk_gpio_mux_delayed_register_get(const char *name,
		const char * const *parent_names, u8 num_parents, unsigned gpio,
		bool active_low)
{
	return clk_register_gpio_mux(NULL, name, parent_names, num_parents,
			gpio, active_low, 0);
}

static void __init of_gpio_clk_setup(struct device_node *node,
		const char *gpio_name,
		struct clk *(*clk_register_get)(const char *name,
				const char * const *parent_names,
				u8 num_parents,
				unsigned gpio, bool active_low))
{
	struct clk_gpio_delayed_register_data *data;
	const char **parent_names;
	int i, num_parents;

	num_parents = of_clk_get_parent_count(node);
	if (num_parents < 0)
		return;

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return;

	if (num_parents) {
		parent_names = kcalloc(num_parents, sizeof(char *), GFP_KERNEL);
		if (!parent_names) {
			kfree(data);
			return;
		}

		for (i = 0; i < num_parents; i++)
			parent_names[i] = of_clk_get_parent_name(node, i);
	} else {
		parent_names = NULL;
	}

	data->num_parents = num_parents;
	data->parent_names = parent_names;
	data->node = node;
	data->gpio_name = gpio_name;
	data->clk_register_get = clk_register_get;
	mutex_init(&data->lock);

	of_clk_add_provider(node, of_clk_gpio_delayed_register_get, data);
}

static void __init of_gpio_gate_clk_setup(struct device_node *node)
{
	of_gpio_clk_setup(node, "enable-gpios",
		of_clk_gpio_gate_delayed_register_get);
}
CLK_OF_DECLARE(gpio_gate_clk, "gpio-gate-clock", of_gpio_gate_clk_setup);

void __init of_gpio_mux_clk_setup(struct device_node *node)
{
	of_gpio_clk_setup(node, "select-gpios",
		of_clk_gpio_mux_delayed_register_get);
}
CLK_OF_DECLARE(gpio_mux_clk, "gpio-mux-clock", of_gpio_mux_clk_setup);
#endif
Commit	Line	Data
c873d14d JS	1	/*
c873d14d JS	2	* Copyright (C) 2013 - 2014 Texas Instruments Incorporated - http://www.ti.com
80eeb1f0 SS	3	*
	4	* Authors:
	5	* Jyri Sarha <jsarha@ti.com>
	6	* Sergej Sawazki <ce3a@gmx.de>
c873d14d JS	7	*
	8	* This program is free software; you can redistribute it and/or modify
	9	* it under the terms of the GNU General Public License version 2 as
	10	* published by the Free Software Foundation.
	11	*
80eeb1f0	12	* Gpio controlled clock implementation
c873d14d JS	13	*/
	14
	15	#include <linux/clk-provider.h>
e21b08e2	16	#include <linux/export.h>
c873d14d JS	17	#include <linux/slab.h>
c873d14d JS	18	#include <linux/gpio.h>
44b4aa97	19	#include <linux/gpio/consumer.h>
c873d14d JS	20	#include <linux/of_gpio.h>
	21	#include <linux/err.h>
	22	#include <linux/device.h>
	23
	24	/**
	25	* DOC: basic gpio gated clock which can be enabled and disabled
	26	* with gpio output
	27	* Traits of this clock:
	28	* prepare - clk_(un)prepare only ensures parent is (un)prepared
	29	* enable - clk_enable and clk_disable are functional & control gpio
	30	* rate - inherits rate from parent. No clk_set_rate support
	31	* parent - fixed parent. No clk_set_parent support
	32	*/
	33
	34	#define to_clk_gpio(_hw) container_of(_hw, struct clk_gpio, hw)
	35
	36	static int clk_gpio_gate_enable(struct clk_hw *hw)
	37	{
	38	struct clk_gpio *clk = to_clk_gpio(hw);
	39
	40	gpiod_set_value(clk->gpiod, 1);
	41
	42	return 0;
	43	}
	44
	45	static void clk_gpio_gate_disable(struct clk_hw *hw)
	46	{
	47	struct clk_gpio *clk = to_clk_gpio(hw);
	48
	49	gpiod_set_value(clk->gpiod, 0);
	50	}
	51
	52	static int clk_gpio_gate_is_enabled(struct clk_hw *hw)
	53	{
	54	struct clk_gpio *clk = to_clk_gpio(hw);
	55
	56	return gpiod_get_value(clk->gpiod);
	57	}
	58
	59	const struct clk_ops clk_gpio_gate_ops = {
	60	.enable = clk_gpio_gate_enable,
	61	.disable = clk_gpio_gate_disable,
	62	.is_enabled = clk_gpio_gate_is_enabled,
	63	};
	64	EXPORT_SYMBOL_GPL(clk_gpio_gate_ops);
	65
	66	/**
80eeb1f0 SS	67	* DOC: basic clock multiplexer which can be controlled with a gpio output
	68	* Traits of this clock:
	69	* prepare - clk_prepare only ensures that parents are prepared
	70	* rate - rate is only affected by parent switching. No clk_set_rate support
	71	* parent - parent is adjustable through clk_set_parent
c873d14d	72	*/
80eeb1f0 SS	73
80eeb1f0 SS	74	static u8 clk_gpio_mux_get_parent(struct clk_hw *hw)
c873d14d	75	{
80eeb1f0 SS	76	struct clk_gpio *clk = to_clk_gpio(hw);
	77
	78	return gpiod_get_value(clk->gpiod);
	79	}
	80
	81	static int clk_gpio_mux_set_parent(struct clk_hw *hw, u8 index)
	82	{
	83	struct clk_gpio *clk = to_clk_gpio(hw);
	84
	85	gpiod_set_value(clk->gpiod, index);
	86
	87	return 0;
	88	}
	89
	90	const struct clk_ops clk_gpio_mux_ops = {
	91	.get_parent = clk_gpio_mux_get_parent,
	92	.set_parent = clk_gpio_mux_set_parent,
	93	.determine_rate = __clk_mux_determine_rate,
	94	};
	95	EXPORT_SYMBOL_GPL(clk_gpio_mux_ops);
	96
	97	static struct clk clk_register_gpio(struct device dev, const char *name,
37bff2c1	98	const char * const *parent_names, u8 num_parents, unsigned gpio,
80eeb1f0 SS	99	bool active_low, unsigned long flags,
	100	const struct clk_ops *clk_gpio_ops)
	101	{
	102	struct clk_gpio *clk_gpio;
	103	struct clk *clk;
	104	struct clk_init_data init = {};
c873d14d JS	105	unsigned long gpio_flags;
	106	int err;
	107
80eeb1f0 SS	108	if (dev)
	109	clk_gpio = devm_kzalloc(dev, sizeof(*clk_gpio), GFP_KERNEL);
	110	else
	111	clk_gpio = kzalloc(sizeof(*clk_gpio), GFP_KERNEL);
	112
	113	if (!clk_gpio)
	114	return ERR_PTR(-ENOMEM);
	115
820ad975 MF	116	if (active_low)
820ad975 MF	117	gpio_flags = GPIOF_ACTIVE_LOW \| GPIOF_OUT_INIT_HIGH;
c873d14d JS	118	else
	119	gpio_flags = GPIOF_OUT_INIT_LOW;
	120
	121	if (dev)
820ad975	122	err = devm_gpio_request_one(dev, gpio, gpio_flags, name);
c873d14d	123	else
820ad975	124	err = gpio_request_one(gpio, gpio_flags, name);
c873d14d	125	if (err) {
281cbb00 SS	126	if (err != -EPROBE_DEFER)
	127	pr_err("%s: %s: Error requesting clock control gpio %u\n",
	128	__func__, name, gpio);
80eeb1f0 SS	129	if (!dev)
80eeb1f0 SS	130	kfree(clk_gpio);
c873d14d	131
80eeb1f0	132	return ERR_PTR(err);
c873d14d JS	133	}
	134
	135	init.name = name;
80eeb1f0	136	init.ops = clk_gpio_ops;
c873d14d	137	init.flags = flags \| CLK_IS_BASIC;
80eeb1f0 SS	138	init.parent_names = parent_names;
80eeb1f0 SS	139	init.num_parents = num_parents;
c873d14d	140
820ad975	141	clk_gpio->gpiod = gpio_to_desc(gpio);
c873d14d JS	142	clk_gpio->hw.init = &init;
c873d14d JS	143
80eeb1f0 SS	144	if (dev)
	145	clk = devm_clk_register(dev, &clk_gpio->hw);
	146	else
	147	clk = clk_register(NULL, &clk_gpio->hw);
c873d14d JS	148
	149	if (!IS_ERR(clk))
	150	return clk;
	151
80eeb1f0 SS	152	if (!dev) {
80eeb1f0 SS	153	gpiod_put(clk_gpio->gpiod);
c873d14d	154	kfree(clk_gpio);
80eeb1f0	155	}
c873d14d JS	156
	157	return clk;
	158	}
80eeb1f0 SS	159
	160	/**
	161	* clk_register_gpio_gate - register a gpio clock gate with the clock framework
	162	* @dev: device that is registering this clock
	163	* @name: name of this clock
	164	* @parent_name: name of this clock's parent
	165	* @gpio: gpio number to gate this clock
	166	* @active_low: true if gpio should be set to 0 to enable clock
	167	* @flags: clock flags
	168	*/
	169	struct clk clk_register_gpio_gate(struct device dev, const char *name,
	170	const char *parent_name, unsigned gpio, bool active_low,
	171	unsigned long flags)
	172	{
	173	return clk_register_gpio(dev, name,
	174	(parent_name ? &parent_name : NULL),
	175	(parent_name ? 1 : 0), gpio, active_low, flags,
	176	&clk_gpio_gate_ops);
	177	}
c873d14d JS	178	EXPORT_SYMBOL_GPL(clk_register_gpio_gate);
c873d14d JS	179
80eeb1f0 SS	180	/**
	181	* clk_register_gpio_mux - register a gpio clock mux with the clock framework
	182	* @dev: device that is registering this clock
	183	* @name: name of this clock
	184	* @parent_names: names of this clock's parents
	185	* @num_parents: number of parents listed in @parent_names
	186	* @gpio: gpio number to gate this clock
	187	* @active_low: true if gpio should be set to 0 to enable clock
	188	* @flags: clock flags
	189	*/
	190	struct clk clk_register_gpio_mux(struct device dev, const char *name,
37bff2c1	191	const char * const *parent_names, u8 num_parents, unsigned gpio,
80eeb1f0 SS	192	bool active_low, unsigned long flags)
	193	{
	194	if (num_parents != 2) {
	195	pr_err("mux-clock %s must have 2 parents\n", name);
	196	return ERR_PTR(-EINVAL);
	197	}
	198
	199	return clk_register_gpio(dev, name, parent_names, num_parents,
	200	gpio, active_low, flags, &clk_gpio_mux_ops);
	201	}
	202	EXPORT_SYMBOL_GPL(clk_register_gpio_mux);
	203
c873d14d JS	204	#ifdef CONFIG_OF
c873d14d JS	205	/**
80eeb1f0	206	* clk_register_get() has to be delayed, because -EPROBE_DEFER
c873d14d JS	207	* can not be handled properly at of_clk_init() call time.
	208	*/
	209
80eeb1f0 SS	210	struct clk_gpio_delayed_register_data {
80eeb1f0 SS	211	const char *gpio_name;
f66541ba JS	212	int num_parents;
f66541ba JS	213	const char **parent_names;
c873d14d JS	214	struct device_node *node;
	215	struct mutex lock;
	216	struct clk *clk;
80eeb1f0	217	struct clk (clk_register_get)(const char *name,
37bff2c1	218	const char * const *parent_names, u8 num_parents,
80eeb1f0	219	unsigned gpio, bool active_low);
c873d14d JS	220	};
c873d14d JS	221
80eeb1f0 SS	222	static struct clk *of_clk_gpio_delayed_register_get(
80eeb1f0 SS	223	struct of_phandle_args clkspec, void _data)
c873d14d	224	{
80eeb1f0	225	struct clk_gpio_delayed_register_data *data = _data;
c873d14d	226	struct clk *clk;
c873d14d	227	int gpio;
820ad975	228	enum of_gpio_flags of_flags;
c873d14d JS	229
	230	mutex_lock(&data->lock);
	231
	232	if (data->clk) {
	233	mutex_unlock(&data->lock);
	234	return data->clk;
	235	}
	236
80eeb1f0 SS	237	gpio = of_get_named_gpio_flags(data->node, data->gpio_name, 0,
80eeb1f0 SS	238	&of_flags);
c873d14d JS	239	if (gpio < 0) {
c873d14d JS	240	mutex_unlock(&data->lock);
80eeb1f0 SS	241	if (gpio == -EPROBE_DEFER)
	242	pr_debug("%s: %s: GPIOs not yet available, retry later\n",
	243	data->node->name, __func__);
	244	else
	245	pr_err("%s: %s: Can't get '%s' DT property\n",
	246	data->node->name, __func__,
	247	data->gpio_name);
c873d14d JS	248	return ERR_PTR(gpio);
c873d14d JS	249	}
c873d14d	250
f66541ba JS	251	clk = data->clk_register_get(data->node->name, data->parent_names,
f66541ba JS	252	data->num_parents, gpio, of_flags & OF_GPIO_ACTIVE_LOW);
80eeb1f0 SS	253	if (IS_ERR(clk))
80eeb1f0 SS	254	goto out;
c873d14d JS	255
c873d14d JS	256	data->clk = clk;
80eeb1f0	257	out:
c873d14d JS	258	mutex_unlock(&data->lock);
	259
	260	return clk;
	261	}
	262
80eeb1f0	263	static struct clk of_clk_gpio_gate_delayed_register_get(const char name,
37bff2c1	264	const char * const *parent_names, u8 num_parents,
80eeb1f0 SS	265	unsigned gpio, bool active_low)
80eeb1f0 SS	266	{
7ed88aa2 RK	267	return clk_register_gpio_gate(NULL, name, parent_names ?
7ed88aa2 RK	268	parent_names[0] : NULL, gpio, active_low, 0);
80eeb1f0 SS	269	}
	270
	271	static struct clk of_clk_gpio_mux_delayed_register_get(const char name,
37bff2c1	272	const char * const *parent_names, u8 num_parents, unsigned gpio,
80eeb1f0 SS	273	bool active_low)
	274	{
	275	return clk_register_gpio_mux(NULL, name, parent_names, num_parents,
	276	gpio, active_low, 0);
	277	}
	278
	279	static void __init of_gpio_clk_setup(struct device_node *node,
	280	const char *gpio_name,
	281	struct clk (clk_register_get)(const char *name,
37bff2c1 SB	282	const char * const *parent_names,
37bff2c1 SB	283	u8 num_parents,
80eeb1f0	284	unsigned gpio, bool active_low))
c873d14d	285	{
80eeb1f0	286	struct clk_gpio_delayed_register_data *data;
f66541ba JS	287	const char **parent_names;
f66541ba JS	288	int i, num_parents;
c873d14d	289
0b2e7886 BN	290	num_parents = of_clk_get_parent_count(node);
	291	if (num_parents < 0)
	292	return;
	293
80eeb1f0	294	data = kzalloc(sizeof(*data), GFP_KERNEL);
c873d14d JS	295	if (!data)
	296	return;
	297
7ed88aa2 RK	298	if (num_parents) {
	299	parent_names = kcalloc(num_parents, sizeof(char *), GFP_KERNEL);
	300	if (!parent_names) {
	301	kfree(data);
	302	return;
	303	}
	304
	305	for (i = 0; i < num_parents; i++)
	306	parent_names[i] = of_clk_get_parent_name(node, i);
	307	} else {
	308	parent_names = NULL;
c76eb11c	309	}
f66541ba	310
f66541ba JS	311	data->num_parents = num_parents;
f66541ba JS	312	data->parent_names = parent_names;
c873d14d	313	data->node = node;
80eeb1f0 SS	314	data->gpio_name = gpio_name;
80eeb1f0 SS	315	data->clk_register_get = clk_register_get;
c873d14d JS	316	mutex_init(&data->lock);
c873d14d JS	317
80eeb1f0 SS	318	of_clk_add_provider(node, of_clk_gpio_delayed_register_get, data);
	319	}
	320
	321	static void __init of_gpio_gate_clk_setup(struct device_node *node)
	322	{
	323	of_gpio_clk_setup(node, "enable-gpios",
	324	of_clk_gpio_gate_delayed_register_get);
c873d14d	325	}
c873d14d	326	CLK_OF_DECLARE(gpio_gate_clk, "gpio-gate-clock", of_gpio_gate_clk_setup);
80eeb1f0 SS	327
	328	void __init of_gpio_mux_clk_setup(struct device_node *node)
	329	{
	330	of_gpio_clk_setup(node, "select-gpios",
	331	of_clk_gpio_mux_delayed_register_get);
	332	}
	333	CLK_OF_DECLARE(gpio_mux_clk, "gpio-mux-clock", of_gpio_mux_clk_setup);
c873d14d	334	#endif