linux/drivers/clk/clkdev.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * drivers/clk/clkdev.c
 *
 *  Copyright (C) 2008 Russell King.
 *
 * Helper for the clk API to assist looking up a struct clk.
 */
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/mutex.h>
#include <linux/clk.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/of.h>

#include "clk.h"

static LIST_HEAD(clocks);
static DEFINE_MUTEX(clocks_mutex);

/*
 * Find the correct struct clk for the device and connection ID.
 * We do slightly fuzzy matching here:
 *  An entry with a NULL ID is assumed to be a wildcard.
 *  If an entry has a device ID, it must match
 *  If an entry has a connection ID, it must match
 * Then we take the most specific entry - with the following
 * order of precedence: dev+con > dev only > con only.
 */
static struct clk_lookup *clk_find(const char *dev_id, const char *con_id)
{}

struct clk_hw *clk_find_hw(const char *dev_id, const char *con_id)
{}

static struct clk *__clk_get_sys(struct device *dev, const char *dev_id,
				 const char *con_id)
{}

struct clk *clk_get_sys(const char *dev_id, const char *con_id)
{}
EXPORT_SYMBOL();

struct clk *clk_get(struct device *dev, const char *con_id)
{}
EXPORT_SYMBOL();

void clk_put(struct clk *clk)
{}
EXPORT_SYMBOL();

static void __clkdev_add(struct clk_lookup *cl)
{}

void clkdev_add(struct clk_lookup *cl)
{}
EXPORT_SYMBOL();

void clkdev_add_table(struct clk_lookup *cl, size_t num)
{}

#define MAX_DEV_ID
#define MAX_CON_ID

struct clk_lookup_alloc {};

static struct clk_lookup * __ref
vclkdev_alloc(struct clk_hw *hw, const char *con_id, const char *dev_fmt,
	va_list ap)
{}

static struct clk_lookup *
vclkdev_create(struct clk_hw *hw, const char *con_id, const char *dev_fmt,
	va_list ap)
{}

/**
 * clkdev_create - allocate and add a clkdev lookup structure
 * @clk: struct clk to associate with all clk_lookups
 * @con_id: connection ID string on device
 * @dev_fmt: format string describing device name
 *
 * Returns a clk_lookup structure, which can be later unregistered and
 * freed.
 */
struct clk_lookup *clkdev_create(struct clk *clk, const char *con_id,
	const char *dev_fmt, ...)
{}
EXPORT_SYMBOL_GPL();

/**
 * clkdev_hw_create - allocate and add a clkdev lookup structure
 * @hw: struct clk_hw to associate with all clk_lookups
 * @con_id: connection ID string on device
 * @dev_fmt: format string describing device name
 *
 * Returns a clk_lookup structure, which can be later unregistered and
 * freed.
 */
struct clk_lookup *clkdev_hw_create(struct clk_hw *hw, const char *con_id,
	const char *dev_fmt, ...)
{}
EXPORT_SYMBOL_GPL();

int clk_add_alias(const char *alias, const char *alias_dev_name,
	const char *con_id, struct device *dev)
{}
EXPORT_SYMBOL();

/*
 * clkdev_drop - remove a clock dynamically allocated
 */
void clkdev_drop(struct clk_lookup *cl)
{}
EXPORT_SYMBOL();

static struct clk_lookup *__clk_register_clkdev(struct clk_hw *hw,
						const char *con_id,
						const char *dev_id, ...)
{}

static int do_clk_register_clkdev(struct clk_hw *hw,
	struct clk_lookup **cl, const char *con_id, const char *dev_id)
{}

/**
 * clk_register_clkdev - register one clock lookup for a struct clk
 * @clk: struct clk to associate with all clk_lookups
 * @con_id: connection ID string on device
 * @dev_id: string describing device name
 *
 * con_id or dev_id may be NULL as a wildcard, just as in the rest of
 * clkdev.
 *
 * To make things easier for mass registration, we detect error clks
 * from a previous clk_register() call, and return the error code for
 * those.  This is to permit this function to be called immediately
 * after clk_register().
 */
int clk_register_clkdev(struct clk *clk, const char *con_id,
	const char *dev_id)
{}
EXPORT_SYMBOL();

/**
 * clk_hw_register_clkdev - register one clock lookup for a struct clk_hw
 * @hw: struct clk_hw to associate with all clk_lookups
 * @con_id: connection ID string on device
 * @dev_id: format string describing device name
 *
 * con_id or dev_id may be NULL as a wildcard, just as in the rest of
 * clkdev.
 *
 * To make things easier for mass registration, we detect error clk_hws
 * from a previous clk_hw_register_*() call, and return the error code for
 * those.  This is to permit this function to be called immediately
 * after clk_hw_register_*().
 */
int clk_hw_register_clkdev(struct clk_hw *hw, const char *con_id,
	const char *dev_id)
{}
EXPORT_SYMBOL();

static void devm_clkdev_release(void *res)
{}

/**
 * devm_clk_hw_register_clkdev - managed clk lookup registration for clk_hw
 * @dev: device this lookup is bound
 * @hw: struct clk_hw to associate with all clk_lookups
 * @con_id: connection ID string on device
 * @dev_id: format string describing device name
 *
 * con_id or dev_id may be NULL as a wildcard, just as in the rest of
 * clkdev.
 *
 * To make things easier for mass registration, we detect error clk_hws
 * from a previous clk_hw_register_*() call, and return the error code for
 * those.  This is to permit this function to be called immediately
 * after clk_hw_register_*().
 */
int devm_clk_hw_register_clkdev(struct device *dev, struct clk_hw *hw,
				const char *con_id, const char *dev_id)
{}
EXPORT_SYMBOL();