Merge tag 'printk-for-5.13-fixup' of git://git.kernel.org/pub/scm/linux/kernel/git...

[mirror_ubuntu-jammy-kernel.git] / 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_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.
 */
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)

extern const struct clk_ops clk_fractional_divider_ops;
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 */