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Current File : /lib/modules/5.15.0-1028-aws/build/include/linux/clk-provider.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  Copyright (c) 2010-2011 Jeremy Kerr <jeremy.kerr@canonical.com>
 *  Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org>
 */
#ifndef __LINUX_CLK_PROVIDER_H
#define __LINUX_CLK_PROVIDER_H

#include <linux/of.h>
#include <linux/of_clk.h>

/*
 * flags used across common struct clk.  these flags should only affect the
 * top-level framework.  custom flags for dealing with hardware specifics
 * belong in struct clk_foo
 *
 * Please update clk_flags[] in drivers/clk/clk.c when making changes here!
 */
#define CLK_SET_RATE_GATE	BIT(0) /* must be gated across rate change */
#define CLK_SET_PARENT_GATE	BIT(1) /* must be gated across re-parent */
#define CLK_SET_RATE_PARENT	BIT(2) /* propagate rate change up one level */
#define CLK_IGNORE_UNUSED	BIT(3) /* do not gate even if unused */
				/* unused */
				/* unused */
#define CLK_GET_RATE_NOCACHE	BIT(6) /* do not use the cached clk rate */
#define CLK_SET_RATE_NO_REPARENT BIT(7) /* don't re-parent on rate change */
#define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */
#define CLK_RECALC_NEW_RATES	BIT(9) /* recalc rates after notifications */
#define CLK_SET_RATE_UNGATE	BIT(10) /* clock needs to run to set rate */
#define CLK_IS_CRITICAL		BIT(11) /* do not gate, ever */
/* parents need enable during gate/ungate, set rate and re-parent */
#define CLK_OPS_PARENT_ENABLE	BIT(12)
/* duty cycle call may be forwarded to the parent clock */
#define CLK_DUTY_CYCLE_PARENT	BIT(13)

struct clk;
struct clk_hw;
struct clk_core;
struct dentry;

/**
 * struct clk_rate_request - Structure encoding the clk constraints that
 * a clock user might require.
 *
 * @rate:		Requested clock rate. This field will be adjusted by
 *			clock drivers according to hardware capabilities.
 * @min_rate:		Minimum rate imposed by clk users.
 * @max_rate:		Maximum rate imposed by clk users.
 * @best_parent_rate:	The best parent rate a parent can provide to fulfill the
 *			requested constraints.
 * @best_parent_hw:	The most appropriate parent clock that fulfills the
 *			requested constraints.
 *
 */
struct clk_rate_request {
	unsigned long rate;
	unsigned long min_rate;
	unsigned long max_rate;
	unsigned long best_parent_rate;
	struct clk_hw *best_parent_hw;
};

/**
 * struct clk_duty - Struture encoding the duty cycle ratio of a clock
 *
 * @num:	Numerator of the duty cycle ratio
 * @den:	Denominator of the duty cycle ratio
 */
struct clk_duty {
	unsigned int num;
	unsigned int den;
};

/**
 * struct clk_ops -  Callback operations for hardware clocks; these are to
 * be provided by the clock implementation, and will be called by drivers
 * through the clk_* api.
 *
 * @prepare:	Prepare the clock for enabling. This must not return until
 *		the clock is fully prepared, and it's safe to call clk_enable.
 *		This callback is intended to allow clock implementations to
 *		do any initialisation that may sleep. Called with
 *		prepare_lock held.
 *
 * @unprepare:	Release the clock from its prepared state. This will typically
 *		undo any work done in the @prepare callback. Called with
 *		prepare_lock held.
 *
 * @is_prepared: Queries the hardware to determine if the clock is prepared.
 *		This function is allowed to sleep. Optional, if this op is not
 *		set then the prepare count will be used.
 *
 * @unprepare_unused: Unprepare the clock atomically.  Only called from
 *		clk_disable_unused for prepare clocks with special needs.
 *		Called with prepare mutex held. This function may sleep.
 *
 * @enable:	Enable the clock atomically. This must not return until the
 *		clock is generating a valid clock signal, usable by consumer
 *		devices. Called with enable_lock held. This function must not
 *		sleep.
 *
 * @disable:	Disable the clock atomically. Called with enable_lock held.
 *		This function must not sleep.
 *
 * @is_enabled:	Queries the hardware to determine if the clock is enabled.
 *		This function must not sleep. Optional, if this op is not
 *		set then the enable count will be used.
 *
 * @disable_unused: Disable the clock atomically.  Only called from
 *		clk_disable_unused for gate clocks with special needs.
 *		Called with enable_lock held.  This function must not
 *		sleep.
 *
 * @save_context: Save the context of the clock in prepration for poweroff.
 *
 * @restore_context: Restore the context of the clock after a restoration
 *		of power.
 *
 * @recalc_rate	Recalculate the rate of this clock, by querying hardware. The
 *		parent rate is an input parameter.  It is up to the caller to
 *		ensure that the prepare_mutex is held across this call.
 *		Returns the calculated rate.  Optional, but recommended - if
 *		this op is not set then clock rate will be initialized to 0.
 *
 * @round_rate:	Given a target rate as input, returns the closest rate actually
 *		supported by the clock. The parent rate is an input/output
 *		parameter.
 *
 * @determine_rate: Given a target rate as input, returns the closest rate
 *		actually supported by the clock, and optionally the parent clock
 *		that should be used to provide the clock rate.
 *
 * @set_parent:	Change the input source of this clock; for clocks with multiple
 *		possible parents specify a new parent by passing in the index
 *		as a u8 corresponding to the parent in either the .parent_names
 *		or .parents arrays.  This function in affect translates an
 *		array index into the value programmed into the hardware.
 *		Returns 0 on success, -EERROR otherwise.
 *
 * @get_parent:	Queries the hardware to determine the parent of a clock.  The
 *		return value is a u8 which specifies the index corresponding to
 *		the parent clock.  This index can be applied to either the
 *		.parent_names or .parents arrays.  In short, this function
 *		translates the parent value read from hardware into an array
 *		index.  Currently only called when the clock is initialized by
 *		__clk_init.  This callback is mandatory for clocks with
 *		multiple parents.  It is optional (and unnecessary) for clocks
 *		with 0 or 1 parents.
 *
 * @set_rate:	Change the rate of this clock. The requested rate is specified
 *		by the second argument, which should typically be the return
 *		of .round_rate call.  The third argument gives the parent rate
 *		which is likely helpful for most .set_rate implementation.
 *		Returns 0 on success, -EERROR otherwise.
 *
 * @set_rate_and_parent: Change the rate and the parent of this clock. The
 *		requested rate is specified by the second argument, which
 *		should typically be the return of .round_rate call.  The
 *		third argument gives the parent rate which is likely helpful
 *		for most .set_rate_and_parent implementation. The fourth
 *		argument gives the parent index. This callback is optional (and
 *		unnecessary) for clocks with 0 or 1 parents as well as
 *		for clocks that can tolerate switching the rate and the parent
 *		separately via calls to .set_parent and .set_rate.
 *		Returns 0 on success, -EERROR otherwise.
 *
 * @recalc_accuracy: Recalculate the accuracy of this clock. The clock accuracy
 *		is expressed in ppb (parts per billion). The parent accuracy is
 *		an input parameter.
 *		Returns the calculated accuracy.  Optional - if	this op is not
 *		set then clock accuracy will be initialized to parent accuracy
 *		or 0 (perfect clock) if clock has no parent.
 *
 * @get_phase:	Queries the hardware to get the current phase of a clock.
 *		Returned values are 0-359 degrees on success, negative
 *		error codes on failure.
 *
 * @set_phase:	Shift the phase this clock signal in degrees specified
 *		by the second argument. Valid values for degrees are
 *		0-359. Return 0 on success, otherwise -EERROR.
 *
 * @get_duty_cycle: Queries the hardware to get the current duty cycle ratio
 *              of a clock. Returned values denominator cannot be 0 and must be
 *              superior or equal to the numerator.
 *
 * @set_duty_cycle: Apply the duty cycle ratio to this clock signal specified by
 *              the numerator (2nd argurment) and denominator (3rd  argument).
 *              Argument must be a valid ratio (denominator > 0
 *              and >= numerator) Return 0 on success, otherwise -EERROR.
 *
 * @init:	Perform platform-specific initialization magic.
 *		This is not used by any of the basic clock types.
 *		This callback exist for HW which needs to perform some
 *		initialisation magic for CCF to get an accurate view of the
 *		clock. It may also be used dynamic resource allocation is
 *		required. It shall not used to deal with clock parameters,
 *		such as rate or parents.
 *		Returns 0 on success, -EERROR otherwise.
 *
 * @terminate:  Free any resource allocated by init.
 *
 * @debug_init:	Set up type-specific debugfs entries for this clock.  This
 *		is called once, after the debugfs directory entry for this
 *		clock has been created.  The dentry pointer representing that
 *		directory is provided as an argument.  Called with
 *		prepare_lock held.  Returns 0 on success, -EERROR otherwise.
 *
 *
 * The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow
 * implementations to split any work between atomic (enable) and sleepable
 * (prepare) contexts.  If enabling a clock requires code that might sleep,
 * this must be done in clk_prepare.  Clock enable code that will never be
 * called in a sleepable context may be implemented in clk_enable.
 *
 * Typically, drivers will call clk_prepare when a clock may be needed later
 * (eg. when a device is opened), and clk_enable when the clock is actually
 * required (eg. from an interrupt). Note that clk_prepare MUST have been
 * called before clk_enable.
 */
struct clk_ops {
	int		(*prepare)(struct clk_hw *hw);
	void		(*unprepare)(struct clk_hw *hw);
	int		(*is_prepared)(struct clk_hw *hw);
	void		(*unprepare_unused)(struct clk_hw *hw);
	int		(*enable)(struct clk_hw *hw);
	void		(*disable)(struct clk_hw *hw);
	int		(*is_enabled)(struct clk_hw *hw);
	void		(*disable_unused)(struct clk_hw *hw);
	int		(*save_context)(struct clk_hw *hw);
	void		(*restore_context)(struct clk_hw *hw);
	unsigned long	(*recalc_rate)(struct clk_hw *hw,
					unsigned long parent_rate);
	long		(*round_rate)(struct clk_hw *hw, unsigned long rate,
					unsigned long *parent_rate);
	int		(*determine_rate)(struct clk_hw *hw,
					  struct clk_rate_request *req);
	int		(*set_parent)(struct clk_hw *hw, u8 index);
	u8		(*get_parent)(struct clk_hw *hw);
	int		(*set_rate)(struct clk_hw *hw, unsigned long rate,
				    unsigned long parent_rate);
	int		(*set_rate_and_parent)(struct clk_hw *hw,
				    unsigned long rate,
				    unsigned long parent_rate, u8 index);
	unsigned long	(*recalc_accuracy)(struct clk_hw *hw,
					   unsigned long parent_accuracy);
	int		(*get_phase)(struct clk_hw *hw);
	int		(*set_phase)(struct clk_hw *hw, int degrees);
	int		(*get_duty_cycle)(struct clk_hw *hw,
					  struct clk_duty *duty);
	int		(*set_duty_cycle)(struct clk_hw *hw,
					  struct clk_duty *duty);
	int		(*init)(struct clk_hw *hw);
	void		(*terminate)(struct clk_hw *hw);
	void		(*debug_init)(struct clk_hw *hw, struct dentry *dentry);
};

/**
 * struct clk_parent_data - clk parent information
 * @hw: parent clk_hw pointer (used for clk providers with internal clks)
 * @fw_name: parent name local to provider registering clk
 * @name: globally unique parent name (used as a fallback)
 * @index: parent index local to provider registering clk (if @fw_name absent)
 */
struct clk_parent_data {
	const struct clk_hw	*hw;
	const char		*fw_name;
	const char		*name;
	int			index;
};

/**
 * struct clk_init_data - holds init data that's common to all clocks and is
 * shared between the clock provider and the common clock framework.
 *
 * @name: clock name
 * @ops: operations this clock supports
 * @parent_names: array of string names for all possible parents
 * @parent_data: array of parent data for all possible parents (when some
 *               parents are external to the clk controller)
 * @parent_hws: array of pointers to all possible parents (when all parents
 *              are internal to the clk controller)
 * @num_parents: number of possible parents
 * @flags: framework-level hints and quirks
 */
struct clk_init_data {
	const char		*name;
	const struct clk_ops	*ops;
	/* Only one of the following three should be assigned */
	const char		* const *parent_names;
	const struct clk_parent_data	*parent_data;
	const struct clk_hw		**parent_hws;
	u8			num_parents;
	unsigned long		flags;
};

/**
 * struct clk_hw - handle for traversing from a struct clk to its corresponding
 * hardware-specific structure.  struct clk_hw should be declared within struct
 * clk_foo and then referenced by the struct clk instance that uses struct
 * clk_foo's clk_ops
 *
 * @core: pointer to the struct clk_core instance that points back to this
 * struct clk_hw instance
 *
 * @clk: pointer to the per-user struct clk instance that can be used to call
 * into the clk API
 *
 * @init: pointer to struct clk_init_data that contains the init data shared
 * with the common clock framework. This pointer will be set to NULL once
 * a clk_register() variant is called on this clk_hw pointer.
 */
struct clk_hw {
	struct clk_core *core;
	struct clk *clk;
	const struct clk_init_data *init;
};

/*
 * DOC: Basic clock implementations common to many platforms
 *
 * Each basic clock hardware type is comprised of a structure describing the
 * clock hardware, implementations of the relevant callbacks in struct clk_ops,
 * unique flags for that hardware type, a registration function and an
 * alternative macro for static initialization
 */

/**
 * struct clk_fixed_rate - fixed-rate clock
 * @hw:		handle between common and hardware-specific interfaces
 * @fixed_rate:	constant frequency of clock
 * @fixed_accuracy: constant accuracy of clock in ppb (parts per billion)
 * @flags:	hardware specific flags
 *
 * Flags:
 * * CLK_FIXED_RATE_PARENT_ACCURACY - Use the accuracy of the parent clk
 *                                    instead of what's set in @fixed_accuracy.
 */
struct clk_fixed_rate {
	struct		clk_hw hw;
	unsigned long	fixed_rate;
	unsigned long	fixed_accuracy;
	unsigned long	flags;
};

#define CLK_FIXED_RATE_PARENT_ACCURACY	BIT(0)

extern const struct clk_ops clk_fixed_rate_ops;
struct clk_hw *__clk_hw_register_fixed_rate(struct device *dev,
		struct device_node *np, const char *name,
		const char *parent_name, const struct clk_hw *parent_hw,
		const struct clk_parent_data *parent_data, unsigned long flags,
		unsigned long fixed_rate, unsigned long fixed_accuracy,
		unsigned long clk_fixed_flags);
struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
		const char *parent_name, unsigned long flags,
		unsigned long fixed_rate);
/**
 * clk_hw_register_fixed_rate - register fixed-rate clock with the clock
 * framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_name: name of clock's parent
 * @flags: framework-specific flags
 * @fixed_rate: non-adjustable clock rate
 */
#define clk_hw_register_fixed_rate(dev, name, parent_name, flags, fixed_rate)  \
	__clk_hw_register_fixed_rate((dev), NULL, (name), (parent_name), NULL, \
				     NULL, (flags), (fixed_rate), 0, 0)
/**
 * clk_hw_register_fixed_rate_parent_hw - register fixed-rate clock with
 * the clock framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_hw: pointer to parent clk
 * @flags: framework-specific flags
 * @fixed_rate: non-adjustable clock rate
 */
#define clk_hw_register_fixed_rate_parent_hw(dev, name, parent_hw, flags,     \
					     fixed_rate)		      \
	__clk_hw_register_fixed_rate((dev), NULL, (name), NULL, (parent_hw),  \
				     NULL, (flags), (fixed_rate), 0, 0)
/**
 * clk_hw_register_fixed_rate_parent_data - register fixed-rate clock with
 * the clock framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_data: parent clk data
 * @flags: framework-specific flags
 * @fixed_rate: non-adjustable clock rate
 */
#define clk_hw_register_fixed_rate_parent_data(dev, name, parent_hw, flags,   \
					     fixed_rate)		      \
	__clk_hw_register_fixed_rate((dev), NULL, (name), NULL, NULL,	      \
				     (parent_data), (flags), (fixed_rate), 0, \
				     0)
/**
 * clk_hw_register_fixed_rate_with_accuracy - register fixed-rate clock with
 * the clock framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_name: name of clock's parent
 * @flags: framework-specific flags
 * @fixed_rate: non-adjustable clock rate
 * @fixed_accuracy: non-adjustable clock accuracy
 */
#define clk_hw_register_fixed_rate_with_accuracy(dev, name, parent_name,      \
						 flags, fixed_rate,	      \
						 fixed_accuracy)	      \
	__clk_hw_register_fixed_rate((dev), NULL, (name), (parent_name),      \
				     NULL, NULL, (flags), (fixed_rate),       \
				     (fixed_accuracy), 0)
/**
 * clk_hw_register_fixed_rate_with_accuracy_parent_hw - register fixed-rate
 * clock with the clock framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_hw: pointer to parent clk
 * @flags: framework-specific flags
 * @fixed_rate: non-adjustable clock rate
 * @fixed_accuracy: non-adjustable clock accuracy
 */
#define clk_hw_register_fixed_rate_with_accuracy_parent_hw(dev, name,	      \
		parent_hw, flags, fixed_rate, fixed_accuracy)		      \
	__clk_hw_register_fixed_rate((dev), NULL, (name), NULL, (parent_hw)   \
				     NULL, NULL, (flags), (fixed_rate),	      \
				     (fixed_accuracy), 0)
/**
 * clk_hw_register_fixed_rate_with_accuracy_parent_data - register fixed-rate
 * clock with the clock framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_name: name of clock's parent
 * @flags: framework-specific flags
 * @fixed_rate: non-adjustable clock rate
 * @fixed_accuracy: non-adjustable clock accuracy
 */
#define clk_hw_register_fixed_rate_with_accuracy_parent_data(dev, name,	      \
		parent_data, flags, fixed_rate, fixed_accuracy)		      \
	__clk_hw_register_fixed_rate((dev), NULL, (name), NULL, NULL,	      \
				     (parent_data), NULL, (flags),	      \
				     (fixed_rate), (fixed_accuracy), 0)

void clk_unregister_fixed_rate(struct clk *clk);
void clk_hw_unregister_fixed_rate(struct clk_hw *hw);

void of_fixed_clk_setup(struct device_node *np);

/**
 * struct clk_gate - gating clock
 *
 * @hw:		handle between common and hardware-specific interfaces
 * @reg:	register controlling gate
 * @bit_idx:	single bit controlling gate
 * @flags:	hardware-specific flags
 * @lock:	register lock
 *
 * Clock which can gate its output.  Implements .enable & .disable
 *
 * Flags:
 * CLK_GATE_SET_TO_DISABLE - by default this clock sets the bit at bit_idx to
 *	enable the clock.  Setting this flag does the opposite: setting the bit
 *	disable the clock and clearing it enables the clock
 * CLK_GATE_HIWORD_MASK - The gate settings are only in lower 16-bit
 *	of this register, and mask of gate bits are in higher 16-bit of this
 *	register.  While setting the gate bits, higher 16-bit should also be
 *	updated to indicate changing gate bits.
 * CLK_GATE_BIG_ENDIAN - by default little endian register accesses are used for
 *	the gate register.  Setting this flag makes the register accesses big
 *	endian.
 */
struct clk_gate {
	struct clk_hw hw;
	void __iomem	*reg;
	u8		bit_idx;
	u8		flags;
	spinlock_t	*lock;
};

#define to_clk_gate(_hw) container_of(_hw, struct clk_gate, hw)

#define CLK_GATE_SET_TO_DISABLE		BIT(0)
#define CLK_GATE_HIWORD_MASK		BIT(1)
#define CLK_GATE_BIG_ENDIAN		BIT(2)

extern const struct clk_ops clk_gate_ops;
struct clk_hw *__clk_hw_register_gate(struct device *dev,
		struct device_node *np, const char *name,
		const char *parent_name, const struct clk_hw *parent_hw,
		const struct clk_parent_data *parent_data,
		unsigned long flags,
		void __iomem *reg, u8 bit_idx,
		u8 clk_gate_flags, spinlock_t *lock);
struct clk *clk_register_gate(struct device *dev, const char *name,
		const char *parent_name, unsigned long flags,
		void __iomem *reg, u8 bit_idx,
		u8 clk_gate_flags, spinlock_t *lock);
/**
 * clk_hw_register_gate - register a gate clock with the clock framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_name: name of this clock's parent
 * @flags: framework-specific flags for this clock
 * @reg: register address to control gating of this clock
 * @bit_idx: which bit in the register controls gating of this clock
 * @clk_gate_flags: gate-specific flags for this clock
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_gate(dev, name, parent_name, flags, reg, bit_idx,     \
			     clk_gate_flags, lock)			      \
	__clk_hw_register_gate((dev), NULL, (name), (parent_name), NULL,      \
			       NULL, (flags), (reg), (bit_idx),		      \
			       (clk_gate_flags), (lock))
/**
 * clk_hw_register_gate_parent_hw - register a gate clock with the clock
 * framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_hw: pointer to parent clk
 * @flags: framework-specific flags for this clock
 * @reg: register address to control gating of this clock
 * @bit_idx: which bit in the register controls gating of this clock
 * @clk_gate_flags: gate-specific flags for this clock
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_gate_parent_hw(dev, name, parent_hw, flags, reg,      \
				       bit_idx, clk_gate_flags, lock)	      \
	__clk_hw_register_gate((dev), NULL, (name), NULL, (parent_hw),        \
			       NULL, (flags), (reg), (bit_idx),		      \
			       (clk_gate_flags), (lock))
/**
 * clk_hw_register_gate_parent_data - register a gate clock with the clock
 * framework
 * @dev: device that is registering this clock
 * @name: name of this clock
 * @parent_data: parent clk data
 * @flags: framework-specific flags for this clock
 * @reg: register address to control gating of this clock
 * @bit_idx: which bit in the register controls gating of this clock
 * @clk_gate_flags: gate-specific flags for this clock
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_gate_parent_data(dev, name, parent_data, flags, reg,  \
				       bit_idx, clk_gate_flags, lock)	      \
	__clk_hw_register_gate((dev), NULL, (name), NULL, NULL, (parent_data), \
			       (flags), (reg), (bit_idx),		      \
			       (clk_gate_flags), (lock))
void clk_unregister_gate(struct clk *clk);
void clk_hw_unregister_gate(struct clk_hw *hw);
int clk_gate_is_enabled(struct clk_hw *hw);

struct clk_div_table {
	unsigned int	val;
	unsigned int	div;
};

/**
 * struct clk_divider - adjustable divider clock
 *
 * @hw:		handle between common and hardware-specific interfaces
 * @reg:	register containing the divider
 * @shift:	shift to the divider bit field
 * @width:	width of the divider bit field
 * @table:	array of value/divider pairs, last entry should have div = 0
 * @lock:	register lock
 *
 * Clock with an adjustable divider affecting its output frequency.  Implements
 * .recalc_rate, .set_rate and .round_rate
 *
 * Flags:
 * CLK_DIVIDER_ONE_BASED - by default the divisor is the value read from the
 *	register plus one.  If CLK_DIVIDER_ONE_BASED is set then the divider is
 *	the raw value read from the register, with the value of zero considered
 *	invalid, unless CLK_DIVIDER_ALLOW_ZERO is set.
 * CLK_DIVIDER_POWER_OF_TWO - clock divisor is 2 raised to the value read from
 *	the hardware register
 * CLK_DIVIDER_ALLOW_ZERO - Allow zero divisors.  For dividers which have
 *	CLK_DIVIDER_ONE_BASED set, it is possible to end up with a zero divisor.
 *	Some hardware implementations gracefully handle this case and allow a
 *	zero divisor by not modifying their input clock
 *	(divide by one / bypass).
 * CLK_DIVIDER_HIWORD_MASK - The divider settings are only in lower 16-bit
 *	of this register, and mask of divider bits are in higher 16-bit of this
 *	register.  While setting the divider bits, higher 16-bit should also be
 *	updated to indicate changing divider bits.
 * CLK_DIVIDER_ROUND_CLOSEST - Makes the best calculated divider to be rounded
 *	to the closest integer instead of the up one.
 * CLK_DIVIDER_READ_ONLY - The divider settings are preconfigured and should
 *	not be changed by the clock framework.
 * CLK_DIVIDER_MAX_AT_ZERO - For dividers which are like CLK_DIVIDER_ONE_BASED
 *	except when the value read from the register is zero, the divisor is
 *	2^width of the field.
 * CLK_DIVIDER_BIG_ENDIAN - By default little endian register accesses are used
 *	for the divider register.  Setting this flag makes the register accesses
 *	big endian.
 */
struct clk_divider {
	struct clk_hw	hw;
	void __iomem	*reg;
	u8		shift;
	u8		width;
	u8		flags;
	const struct clk_div_table	*table;
	spinlock_t	*lock;
};

#define clk_div_mask(width)	((1 << (width)) - 1)
#define to_clk_divider(_hw) container_of(_hw, struct clk_divider, hw)

#define CLK_DIVIDER_ONE_BASED		BIT(0)
#define CLK_DIVIDER_POWER_OF_TWO	BIT(1)
#define CLK_DIVIDER_ALLOW_ZERO		BIT(2)
#define CLK_DIVIDER_HIWORD_MASK		BIT(3)
#define CLK_DIVIDER_ROUND_CLOSEST	BIT(4)
#define CLK_DIVIDER_READ_ONLY		BIT(5)
#define CLK_DIVIDER_MAX_AT_ZERO		BIT(6)
#define CLK_DIVIDER_BIG_ENDIAN		BIT(7)

extern const struct clk_ops clk_divider_ops;
extern const struct clk_ops clk_divider_ro_ops;

unsigned long divider_recalc_rate(struct clk_hw *hw, unsigned long parent_rate,
		unsigned int val, const struct clk_div_table *table,
		unsigned long flags, unsigned long width);
long divider_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent,
			       unsigned long rate, unsigned long *prate,
			       const struct clk_div_table *table,
			       u8 width, unsigned long flags);
long divider_ro_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent,
				  unsigned long rate, unsigned long *prate,
				  const struct clk_div_table *table, u8 width,
				  unsigned long flags, unsigned int val);
int divider_determine_rate(struct clk_hw *hw, struct clk_rate_request *req,
			   const struct clk_div_table *table, u8 width,
			   unsigned long flags);
int divider_ro_determine_rate(struct clk_hw *hw, struct clk_rate_request *req,
			      const struct clk_div_table *table, u8 width,
			      unsigned long flags, unsigned int val);
int divider_get_val(unsigned long rate, unsigned long parent_rate,
		const struct clk_div_table *table, u8 width,
		unsigned long flags);

struct clk_hw *__clk_hw_register_divider(struct device *dev,
		struct device_node *np, const char *name,
		const char *parent_name, const struct clk_hw *parent_hw,
		const struct clk_parent_data *parent_data, unsigned long flags,
		void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
		const struct clk_div_table *table, spinlock_t *lock);
struct clk_hw *__devm_clk_hw_register_divider(struct device *dev,
		struct device_node *np, const char *name,
		const char *parent_name, const struct clk_hw *parent_hw,
		const struct clk_parent_data *parent_data, unsigned long flags,
		void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
		const struct clk_div_table *table, spinlock_t *lock);
struct clk *clk_register_divider_table(struct device *dev, const char *name,
		const char *parent_name, unsigned long flags,
		void __iomem *reg, u8 shift, u8 width,
		u8 clk_divider_flags, const struct clk_div_table *table,
		spinlock_t *lock);
/**
 * clk_register_divider - register a divider clock with the clock framework
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_name: name of clock's parent
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @lock: shared register lock for this clock
 */
#define clk_register_divider(dev, name, parent_name, flags, reg, shift, width, \
			     clk_divider_flags, lock)			       \
	clk_register_divider_table((dev), (name), (parent_name), (flags),      \
				   (reg), (shift), (width),		       \
				   (clk_divider_flags), NULL, (lock))
/**
 * clk_hw_register_divider - register a divider clock with the clock framework
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_name: name of clock's parent
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_divider(dev, name, parent_name, flags, reg, shift,    \
				width, clk_divider_flags, lock)		      \
	__clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL,   \
				  NULL, (flags), (reg), (shift), (width),     \
				  (clk_divider_flags), NULL, (lock))
/**
 * clk_hw_register_divider_parent_hw - register a divider clock with the clock
 * framework
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_hw: pointer to parent clk
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_divider_parent_hw(dev, name, parent_hw, flags, reg,   \
					  shift, width, clk_divider_flags,    \
					  lock)				      \
	__clk_hw_register_divider((dev), NULL, (name), NULL, (parent_hw),     \
				  NULL, (flags), (reg), (shift), (width),     \
				  (clk_divider_flags), NULL, (lock))
/**
 * clk_hw_register_divider_parent_data - register a divider clock with the clock
 * framework
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_data: parent clk data
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_divider_parent_data(dev, name, parent_data, flags,    \
					    reg, shift, width,		      \
					    clk_divider_flags, lock)	      \
	__clk_hw_register_divider((dev), NULL, (name), NULL, NULL,	      \
				  (parent_data), (flags), (reg), (shift),     \
				  (width), (clk_divider_flags), NULL, (lock))
/**
 * clk_hw_register_divider_table - register a table based divider clock with
 * the clock framework
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_name: name of clock's parent
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @table: array of divider/value pairs ending with a div set to 0
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_divider_table(dev, name, parent_name, flags, reg,     \
				      shift, width, clk_divider_flags, table, \
				      lock)				      \
	__clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL,   \
				  NULL, (flags), (reg), (shift), (width),     \
				  (clk_divider_flags), (table), (lock))
/**
 * clk_hw_register_divider_table_parent_hw - register a table based divider
 * clock with the clock framework
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_hw: pointer to parent clk
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @table: array of divider/value pairs ending with a div set to 0
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_divider_table_parent_hw(dev, name, parent_hw, flags,  \
						reg, shift, width,	      \
						clk_divider_flags, table,     \
						lock)			      \
	__clk_hw_register_divider((dev), NULL, (name), NULL, (parent_hw),     \
				  NULL, (flags), (reg), (shift), (width),     \
				  (clk_divider_flags), (table), (lock))
/**
 * clk_hw_register_divider_table_parent_data - register a table based divider
 * clock with the clock framework
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_data: parent clk data
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @table: array of divider/value pairs ending with a div set to 0
 * @lock: shared register lock for this clock
 */
#define clk_hw_register_divider_table_parent_data(dev, name, parent_data,     \
						  flags, reg, shift, width,   \
						  clk_divider_flags, table,   \
						  lock)			      \
	__clk_hw_register_divider((dev), NULL, (name), NULL, NULL,	      \
				  (parent_data), (flags), (reg), (shift),     \
				  (width), (clk_divider_flags), (table),      \
				  (lock))
/**
 * devm_clk_hw_register_divider - register a divider clock with the clock framework
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_name: name of clock's parent
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @lock: shared register lock for this clock
 */
#define devm_clk_hw_register_divider(dev, name, parent_name, flags, reg, shift,    \
				width, clk_divider_flags, lock)		      \
	__devm_clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL,   \
				  NULL, (flags), (reg), (shift), (width),     \
				  (clk_divider_flags), NULL, (lock))
/**
 * devm_clk_hw_register_divider_table - register a table based divider clock
 * with the clock framework (devres variant)
 * @dev: device registering this clock
 * @name: name of this clock
 * @parent_name: name of clock's parent
 * @flags: framework-specific flags
 * @reg: register address to adjust divider
 * @shift: number of bits to shift the bitfield
 * @width: width of the bitfield
 * @clk_divider_flags: divider-specific flags for this clock
 * @table: array of divider/value pairs ending with a div set to 0
 * @lock: shared register lock for this clock
 */
#define devm_clk_hw_register_divider_table(dev, name, parent_name, flags,     \
					   reg, shift, width,		      \
					   clk_divider_flags, table, lock)    \
	__devm_clk_hw_register_divider((dev), NULL, (name), (parent_name),    \
				       NULL, NULL, (flags), (reg), (shift),   \
				       (width), (clk_divider_flags), (table), \
				       (lock))

void clk_unregister_divider(struct clk *clk);
void clk_hw_unregister_divider(struct clk_hw *hw);

/**
 * struct clk_mux - multiplexer clock
 *
 * @hw:		handle between common and hardware-specific interfaces
 * @reg:	register controlling multiplexer
 * @table:	array of register values corresponding to the parent index
 * @shift:	shift to multiplexer bit field
 * @mask:	mask of mutliplexer bit field
 * @flags:	hardware-specific flags
 * @lock:	register lock
 *
 * Clock with multiple selectable parents.  Implements .get_parent, .set_parent
 * and .recalc_rate
 *
 * Flags:
 * CLK_MUX_INDEX_ONE - register index starts at 1, not 0
 * CLK_MUX_INDEX_BIT - register index is a single bit (power of two)
 * CLK_MUX_HIWORD_MASK - The mux settings are only in lower 16-bit of this
 *	register, and mask of mux bits are in higher 16-bit of this register.
 *	While setting the mux bits, higher 16-bit should also be updated to
 *	indicate changing mux bits.
 * CLK_MUX_READ_ONLY - The mux registers can't be written, only read in the
 * 	.get_parent clk_op.
 * CLK_MUX_ROUND_CLOSEST - Use the parent rate that is closest to the desired
 *	frequency.
 * CLK_MUX_BIG_ENDIAN - By default little endian register accesses are used for
 *	the mux register.  Setting this flag makes the register accesses big
 *	endian.
 */
struct clk_mux {
	struct clk_hw	hw;
	void __iomem	*reg;
	u32		*table;
	u32		mask;
	u8		shift;
	u8		flags;
	spinlock_t	*lock;
};

#define to_clk_mux(_hw) container_of(_hw, struct clk_mux, hw)

#define CLK_MUX_INDEX_ONE		BIT(0)
#define CLK_MUX_INDEX_BIT		BIT(1)
#define CLK_MUX_HIWORD_MASK		BIT(2)
#define CLK_MUX_READ_ONLY		BIT(3) /* mux can't be changed */
#define CLK_MUX_ROUND_CLOSEST		BIT(4)
#define CLK_MUX_BIG_ENDIAN		BIT(5)

extern const struct clk_ops clk_mux_ops;
extern const struct clk_ops clk_mux_ro_ops;

struct clk_hw *__clk_hw_register_mux(struct device *dev, struct device_node *np,
		const char *name, u8 num_parents,
		const char * const *parent_names,
		const struct clk_hw **parent_hws,
		const struct clk_parent_data *parent_data,
		unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
		u8 clk_mux_flags, u32 *table, spinlock_t *lock);
struct clk_hw *__devm_clk_hw_register_mux(struct device *dev, struct device_node *np,
		const char *name, u8 num_parents,
		const char * const *parent_names,
		const struct clk_hw **parent_hws,
		const struct clk_parent_data *parent_data,
		unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
		u8 clk_mux_flags, u32 *table, spinlock_t *lock);
struct clk *clk_register_mux_table(struct device *dev, const char *name,
		const char * const *parent_names, u8 num_parents,
		unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
		u8 clk_mux_flags, u32 *table, spinlock_t *lock);

#define clk_register_mux(dev, name, parent_names, num_parents, flags, reg,    \
			 shift, width, clk_mux_flags, lock)		      \
	clk_register_mux_table((dev), (name), (parent_names), (num_parents),  \
			       (flags), (reg), (shift), BIT((width)) - 1,     \
			       (clk_mux_flags), NULL, (lock))
#define clk_hw_register_mux_table(dev, name, parent_names, num_parents,	      \
				  flags, reg, shift, mask, clk_mux_flags,     \
				  table, lock)				      \
	__clk_hw_register_mux((dev), NULL, (name), (num_parents),	      \
			      (parent_names), NULL, NULL, (flags), (reg),     \
			      (shift), (mask), (clk_mux_flags), (table),      \
			      (lock))
#define clk_hw_register_mux(dev, name, parent_names, num_parents, flags, reg, \
			    shift, width, clk_mux_flags, lock)		      \
	__clk_hw_register_mux((dev), NULL, (name), (num_parents),	      \
			      (parent_names), NULL, NULL, (flags), (reg),     \
			      (shift), BIT((width)) - 1, (clk_mux_flags),     \
			      NULL, (lock))
#define clk_hw_register_mux_hws(dev, name, parent_hws, num_parents, flags,    \
				reg, shift, width, clk_mux_flags, lock)	      \
	__clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL,	      \
			      (parent_hws), NULL, (flags), (reg), (shift),    \
			      BIT((width)) - 1, (clk_mux_flags), NULL, (lock))
#define clk_hw_register_mux_parent_data(dev, name, parent_data, num_parents,  \
					flags, reg, shift, width,	      \
					clk_mux_flags, lock)		      \
	__clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, NULL, \
			      (parent_data), (flags), (reg), (shift),	      \
			      BIT((width)) - 1, (clk_mux_flags), NULL, (lock))
#define devm_clk_hw_register_mux(dev, name, parent_names, num_parents, flags, reg, \
			    shift, width, clk_mux_flags, lock)		      \
	__devm_clk_hw_register_mux((dev), NULL, (name), (num_parents),	      \
			      (parent_names), NULL, NULL, (flags), (reg),     \
			      (shift), BIT((width)) - 1, (clk_mux_flags),     \
			      NULL, (lock))

int clk_mux_val_to_index(struct clk_hw *hw, u32 *table, unsigned int flags,
			 unsigned int val);
unsigned int clk_mux_index_to_val(u32 *table, unsigned int flags, u8 index);

void clk_unregister_mux(struct clk *clk);
void clk_hw_unregister_mux(struct clk_hw *hw);

void of_fixed_factor_clk_setup(struct device_node *node);

/**
 * struct clk_fixed_factor - fixed multiplier and divider clock
 *
 * @hw:		handle between common and hardware-specific interfaces
 * @mult:	multiplier
 * @div:	divider
 *
 * Clock with a fixed multiplier and divider. The output frequency is the
 * parent clock rate divided by div and multiplied by mult.
 * Implements .recalc_rate, .set_rate and .round_rate
 */

struct clk_fixed_factor {
	struct clk_hw	hw;
	unsigned int	mult;
	unsigned int	div;
};

#define to_clk_fixed_factor(_hw) container_of(_hw, struct clk_fixed_factor, hw)

extern const struct clk_ops clk_fixed_factor_ops;
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);
void clk_unregister_fixed_factor(struct clk *clk);
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);
void clk_hw_unregister_fixed_factor(struct clk_hw *hw);
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);
/**
 * struct clk_fractional_divider - adjustable fractional divider clock
 *
 * @hw:		handle between common and hardware-specific interfaces
 * @reg:	register containing the divider
 * @mshift:	shift to the numerator bit field
 * @mwidth:	width of the numerator bit field
 * @nshift:	shift to the denominator bit field
 * @nwidth:	width of the denominator bit field
 * @lock:	register lock
 *
 * Clock with adjustable fractional divider affecting its output frequency.
 *
 * Flags:
 * CLK_FRAC_DIVIDER_ZERO_BASED - by default the numerator and denominator
 *	is the value read from the register. If CLK_FRAC_DIVIDER_ZERO_BASED
 *	is set then the numerator and denominator are both the value read
 *	plus one.
 * CLK_FRAC_DIVIDER_BIG_ENDIAN - By default little endian register accesses are
 *	used for the divider register.  Setting this flag makes the register
 *	accesses big endian.
 * CLK_FRAC_DIVIDER_POWER_OF_TWO_PS - By default the resulting fraction might
 *	be saturated and the caller will get quite far from the good enough
 *	approximation. Instead the caller may require, by setting this flag,
 *	to shift left by a few bits in case, when the asked one is quite small
 *	to satisfy the desired range of denominator. It assumes that on the
 *	caller's side the power-of-two capable prescaler exists.
 */
struct clk_fractional_divider {
	struct clk_hw	hw;
	void __iomem	*reg;
	u8		mshift;
	u8		mwidth;
	u32		mmask;
	u8		nshift;
	u8		nwidth;
	u32		nmask;
	u8		flags;
	void		(*approximation)(struct clk_hw *hw,
				unsigned long rate, unsigned long *parent_rate,
				unsigned long *m, unsigned long *n);
	spinlock_t	*lock;
};

#define to_clk_fd(_hw) container_of(_hw, struct clk_fractional_divider, hw)

#define CLK_FRAC_DIVIDER_ZERO_BASED		BIT(0)
#define CLK_FRAC_DIVIDER_BIG_ENDIAN		BIT(1)
#define CLK_FRAC_DIVIDER_POWER_OF_TWO_PS	BIT(2)

struct clk *clk_register_fractional_divider(struct device *dev,
		const char *name, const char *parent_name, unsigned long flags,
		void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
		u8 clk_divider_flags, spinlock_t *lock);
struct clk_hw *clk_hw_register_fractional_divider(struct device *dev,
		const char *name, const char *parent_name, unsigned long flags,
		void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
		u8 clk_divider_flags, spinlock_t *lock);
void clk_hw_unregister_fractional_divider(struct clk_hw *hw);

/**
 * struct clk_multiplier - adjustable multiplier clock
 *
 * @hw:		handle between common and hardware-specific interfaces
 * @reg:	register containing the multiplier
 * @shift:	shift to the multiplier bit field
 * @width:	width of the multiplier bit field
 * @lock:	register lock
 *
 * Clock with an adjustable multiplier affecting its output frequency.
 * Implements .recalc_rate, .set_rate and .round_rate
 *
 * Flags:
 * CLK_MULTIPLIER_ZERO_BYPASS - By default, the multiplier is the value read
 *	from the register, with 0 being a valid value effectively
 *	zeroing the output clock rate. If CLK_MULTIPLIER_ZERO_BYPASS is
 *	set, then a null multiplier will be considered as a bypass,
 *	leaving the parent rate unmodified.
 * CLK_MULTIPLIER_ROUND_CLOSEST - Makes the best calculated divider to be
 *	rounded to the closest integer instead of the down one.
 * CLK_MULTIPLIER_BIG_ENDIAN - By default little endian register accesses are
 *	used for the multiplier register.  Setting this flag makes the register
 *	accesses big endian.
 */
struct clk_multiplier {
	struct clk_hw	hw;
	void __iomem	*reg;
	u8		shift;
	u8		width;
	u8		flags;
	spinlock_t	*lock;
};

#define to_clk_multiplier(_hw) container_of(_hw, struct clk_multiplier, hw)

#define CLK_MULTIPLIER_ZERO_BYPASS	BIT(0)
#define CLK_MULTIPLIER_ROUND_CLOSEST	BIT(1)
#define CLK_MULTIPLIER_BIG_ENDIAN	BIT(2)

extern const struct clk_ops clk_multiplier_ops;

/***
 * struct clk_composite - aggregate clock of mux, divider and gate clocks
 *
 * @hw:		handle between common and hardware-specific interfaces
 * @mux_hw:	handle between composite and hardware-specific mux clock
 * @rate_hw:	handle between composite and hardware-specific rate clock
 * @gate_hw:	handle between composite and hardware-specific gate clock
 * @mux_ops:	clock ops for mux
 * @rate_ops:	clock ops for rate
 * @gate_ops:	clock ops for gate
 */
struct clk_composite {
	struct clk_hw	hw;
	struct clk_ops	ops;

	struct clk_hw	*mux_hw;
	struct clk_hw	*rate_hw;
	struct clk_hw	*gate_hw;

	const struct clk_ops	*mux_ops;
	const struct clk_ops	*rate_ops;
	const struct clk_ops	*gate_ops;
};

#define to_clk_composite(_hw) container_of(_hw, struct clk_composite, hw)

struct clk *clk_register_composite(struct device *dev, const char *name,
		const char * const *parent_names, int num_parents,
		struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
		struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
		struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
		unsigned long flags);
struct clk *clk_register_composite_pdata(struct device *dev, const char *name,
		const struct clk_parent_data *parent_data, int num_parents,
		struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
		struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
		struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
		unsigned long flags);
void clk_unregister_composite(struct clk *clk);
struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
		const char * const *parent_names, int num_parents,
		struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
		struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
		struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
		unsigned long flags);
struct clk_hw *clk_hw_register_composite_pdata(struct device *dev,
		const char *name,
		const struct clk_parent_data *parent_data, int num_parents,
		struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
		struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
		struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
		unsigned long flags);
struct clk_hw *devm_clk_hw_register_composite_pdata(struct device *dev,
		const char *name, const struct clk_parent_data *parent_data,
		int num_parents,
		struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
		struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
		struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
		unsigned long flags);
void clk_hw_unregister_composite(struct clk_hw *hw);

struct clk *clk_register(struct device *dev, struct clk_hw *hw);
struct clk *devm_clk_register(struct device *dev, struct clk_hw *hw);

int __must_check clk_hw_register(struct device *dev, struct clk_hw *hw);
int __must_check devm_clk_hw_register(struct device *dev, struct clk_hw *hw);
int __must_check of_clk_hw_register(struct device_node *node, struct clk_hw *hw);

void clk_unregister(struct clk *clk);
void devm_clk_unregister(struct device *dev, struct clk *clk);

void clk_hw_unregister(struct clk_hw *hw);
void devm_clk_hw_unregister(struct device *dev, struct clk_hw *hw);

/* helper functions */
const char *__clk_get_name(const struct clk *clk);
const char *clk_hw_get_name(const struct clk_hw *hw);
#ifdef CONFIG_COMMON_CLK
struct clk_hw *__clk_get_hw(struct clk *clk);
#else
static inline struct clk_hw *__clk_get_hw(struct clk *clk)
{
	return (struct clk_hw *)clk;
}
#endif

struct clk *clk_hw_get_clk(struct clk_hw *hw, const char *con_id);
struct clk *devm_clk_hw_get_clk(struct device *dev, struct clk_hw *hw,
				const char *con_id);

unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
					  unsigned int index);
int clk_hw_get_parent_index(struct clk_hw *hw);
int clk_hw_set_parent(struct clk_hw *hw, struct clk_hw *new_parent);
unsigned int __clk_get_enable_count(struct clk *clk);
unsigned long clk_hw_get_rate(const struct clk_hw *hw);
unsigned long clk_hw_get_flags(const struct clk_hw *hw);
#define clk_hw_can_set_rate_parent(hw) \
	(clk_hw_get_flags((hw)) & CLK_SET_RATE_PARENT)

bool clk_hw_is_prepared(const struct clk_hw *hw);
bool clk_hw_rate_is_protected(const struct clk_hw *hw);
bool clk_hw_is_enabled(const struct clk_hw *hw);
bool __clk_is_enabled(struct clk *clk);
struct clk *__clk_lookup(const char *name);
int __clk_mux_determine_rate(struct clk_hw *hw,
			     struct clk_rate_request *req);
int __clk_determine_rate(struct clk_hw *core, struct clk_rate_request *req);
int __clk_mux_determine_rate_closest(struct clk_hw *hw,
				     struct clk_rate_request *req);
int clk_mux_determine_rate_flags(struct clk_hw *hw,
				 struct clk_rate_request *req,
				 unsigned long flags);
void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent);
void clk_hw_set_rate_range(struct clk_hw *hw, unsigned long min_rate,
			   unsigned long max_rate);

static inline void __clk_hw_set_clk(struct clk_hw *dst, struct clk_hw *src)
{
	dst->clk = src->clk;
	dst->core = src->core;
}

static inline long divider_round_rate(struct clk_hw *hw, unsigned long rate,
				      unsigned long *prate,
				      const struct clk_div_table *table,
				      u8 width, unsigned long flags)
{
	return divider_round_rate_parent(hw, clk_hw_get_parent(hw),
					 rate, prate, table, width, flags);
}

static inline long divider_ro_round_rate(struct clk_hw *hw, unsigned long rate,
					 unsigned long *prate,
					 const struct clk_div_table *table,
					 u8 width, unsigned long flags,
					 unsigned int val)
{
	return divider_ro_round_rate_parent(hw, clk_hw_get_parent(hw),
					    rate, prate, table, width, flags,
					    val);
}

/*
 * FIXME clock api without lock protection
 */
unsigned long clk_hw_round_rate(struct clk_hw *hw, unsigned long rate);

struct clk_onecell_data {
	struct clk **clks;
	unsigned int clk_num;
};

struct clk_hw_onecell_data {
	unsigned int num;
	struct clk_hw *hws[];
};

#define CLK_OF_DECLARE(name, compat, fn) OF_DECLARE_1(clk, name, compat, fn)

/*
 * Use this macro when you have a driver that requires two initialization
 * routines, one at of_clk_init(), and one at platform device probe
 */
#define CLK_OF_DECLARE_DRIVER(name, compat, fn) \
	static void __init name##_of_clk_init_driver(struct device_node *np) \
	{								\
		of_node_clear_flag(np, OF_POPULATED);			\
		fn(np);							\
	}								\
	OF_DECLARE_1(clk, name, compat, name##_of_clk_init_driver)

#define CLK_HW_INIT(_name, _parent, _ops, _flags)		\
	(&(struct clk_init_data) {				\
		.flags		= _flags,			\
		.name		= _name,			\
		.parent_names	= (const char *[]) { _parent },	\
		.num_parents	= 1,				\
		.ops		= _ops,				\
	})

#define CLK_HW_INIT_HW(_name, _parent, _ops, _flags)			\
	(&(struct clk_init_data) {					\
		.flags		= _flags,				\
		.name		= _name,				\
		.parent_hws	= (const struct clk_hw*[]) { _parent },	\
		.num_parents	= 1,					\
		.ops		= _ops,					\
	})

/*
 * This macro is intended for drivers to be able to share the otherwise
 * individual struct clk_hw[] compound literals created by the compiler
 * when using CLK_HW_INIT_HW. It does NOT support multiple parents.
 */
#define CLK_HW_INIT_HWS(_name, _parent, _ops, _flags)			\
	(&(struct clk_init_data) {					\
		.flags		= _flags,				\
		.name		= _name,				\
		.parent_hws	= _parent,				\
		.num_parents	= 1,					\
		.ops		= _ops,					\
	})

#define CLK_HW_INIT_FW_NAME(_name, _parent, _ops, _flags)		\
	(&(struct clk_init_data) {					\
		.flags		= _flags,				\
		.name		= _name,				\
		.parent_data	= (const struct clk_parent_data[]) {	\
					{ .fw_name = _parent },		\
				  },					\
		.num_parents	= 1,					\
		.ops		= _ops,					\
	})

#define CLK_HW_INIT_PARENTS(_name, _parents, _ops, _flags)	\
	(&(struct clk_init_data) {				\
		.flags		= _flags,			\
		.name		= _name,			\
		.parent_names	= _parents,			\
		.num_parents	= ARRAY_SIZE(_parents),		\
		.ops		= _ops,				\
	})

#define CLK_HW_INIT_PARENTS_HW(_name, _parents, _ops, _flags)	\
	(&(struct clk_init_data) {				\
		.flags		= _flags,			\
		.name		= _name,			\
		.parent_hws	= _parents,			\
		.num_parents	= ARRAY_SIZE(_parents),		\
		.ops		= _ops,				\
	})

#define CLK_HW_INIT_PARENTS_DATA(_name, _parents, _ops, _flags)	\
	(&(struct clk_init_data) {				\
		.flags		= _flags,			\
		.name		= _name,			\
		.parent_data	= _parents,			\
		.num_parents	= ARRAY_SIZE(_parents),		\
		.ops		= _ops,				\
	})

#define CLK_HW_INIT_NO_PARENT(_name, _ops, _flags)	\
	(&(struct clk_init_data) {			\
		.flags          = _flags,		\
		.name           = _name,		\
		.parent_names   = NULL,			\
		.num_parents    = 0,			\
		.ops            = _ops,			\
	})

#define CLK_FIXED_FACTOR(_struct, _name, _parent,			\
			_div, _mult, _flags)				\
	struct clk_fixed_factor _struct = {				\
		.div		= _div,					\
		.mult		= _mult,				\
		.hw.init	= CLK_HW_INIT(_name,			\
					      _parent,			\
					      &clk_fixed_factor_ops,	\
					      _flags),			\
	}

#define CLK_FIXED_FACTOR_HW(_struct, _name, _parent,			\
			    _div, _mult, _flags)			\
	struct clk_fixed_factor _struct = {				\
		.div		= _div,					\
		.mult		= _mult,				\
		.hw.init	= CLK_HW_INIT_HW(_name,			\
						 _parent,		\
						 &clk_fixed_factor_ops,	\
						 _flags),		\
	}

/*
 * This macro allows the driver to reuse the _parent array for multiple
 * fixed factor clk declarations.
 */
#define CLK_FIXED_FACTOR_HWS(_struct, _name, _parent,			\
			     _div, _mult, _flags)			\
	struct clk_fixed_factor _struct = {				\
		.div		= _div,					\
		.mult		= _mult,				\
		.hw.init	= CLK_HW_INIT_HWS(_name,		\
						  _parent,		\
						  &clk_fixed_factor_ops, \
						  _flags),	\
	}

#define CLK_FIXED_FACTOR_FW_NAME(_struct, _name, _parent,		\
				 _div, _mult, _flags)			\
	struct clk_fixed_factor _struct = {				\
		.div		= _div,					\
		.mult		= _mult,				\
		.hw.init	= CLK_HW_INIT_FW_NAME(_name,		\
						      _parent,		\
						      &clk_fixed_factor_ops, \
						      _flags),		\
	}

#ifdef CONFIG_OF
int of_clk_add_provider(struct device_node *np,
			struct clk *(*clk_src_get)(struct of_phandle_args *args,
						   void *data),
			void *data);
int of_clk_add_hw_provider(struct device_node *np,
			   struct clk_hw *(*get)(struct of_phandle_args *clkspec,
						 void *data),
			   void *data);
int devm_of_clk_add_hw_provider(struct device *dev,
			   struct clk_hw *(*get)(struct of_phandle_args *clkspec,
						 void *data),
			   void *data);
void of_clk_del_provider(struct device_node *np);
void devm_of_clk_del_provider(struct device *dev);
struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
				  void *data);
struct clk_hw *of_clk_hw_simple_get(struct of_phandle_args *clkspec,
				    void *data);
struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
struct clk_hw *of_clk_hw_onecell_get(struct of_phandle_args *clkspec,
				     void *data);
int of_clk_parent_fill(struct device_node *np, const char **parents,
		       unsigned int size);
int of_clk_detect_critical(struct device_node *np, int index,
			    unsigned long *flags);

#else /* !CONFIG_OF */

static inline int of_clk_add_provider(struct device_node *np,
			struct clk *(*clk_src_get)(struct of_phandle_args *args,
						   void *data),
			void *data)
{
	return 0;
}
static inline int of_clk_add_hw_provider(struct device_node *np,
			struct clk_hw *(*get)(struct of_phandle_args *clkspec,
					      void *data),
			void *data)
{
	return 0;
}
static inline int devm_of_clk_add_hw_provider(struct device *dev,
			   struct clk_hw *(*get)(struct of_phandle_args *clkspec,
						 void *data),
			   void *data)
{
	return 0;
}
static inline void of_clk_del_provider(struct device_node *np) {}
static inline void devm_of_clk_del_provider(struct device *dev) {}
static inline struct clk *of_clk_src_simple_get(
	struct of_phandle_args *clkspec, void *data)
{
	return ERR_PTR(-ENOENT);
}
static inline struct clk_hw *
of_clk_hw_simple_get(struct of_phandle_args *clkspec, void *data)
{
	return ERR_PTR(-ENOENT);
}
static inline struct clk *of_clk_src_onecell_get(
	struct of_phandle_args *clkspec, void *data)
{
	return ERR_PTR(-ENOENT);
}
static inline struct clk_hw *
of_clk_hw_onecell_get(struct of_phandle_args *clkspec, void *data)
{
	return ERR_PTR(-ENOENT);
}
static inline int of_clk_parent_fill(struct device_node *np,
				     const char **parents, unsigned int size)
{
	return 0;
}
static inline int of_clk_detect_critical(struct device_node *np, int index,
					  unsigned long *flags)
{
	return 0;
}
#endif /* CONFIG_OF */

void clk_gate_restore_context(struct clk_hw *hw);

#endif /* CLK_PROVIDER_H */

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