clk-fixed-factor.c | Explore in Territory

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2011 Sascha Hauer, Pengutronix <[email protected]>
 */
#include <linux/module.h>
#include <linux/clk-provider.h>
#include <linux/slab.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>

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

static unsigned long clk_factor_recalc_rate(struct clk_hw *hw,
		unsigned long parent_rate)
{ … }

static long clk_factor_round_rate(struct clk_hw *hw, unsigned long rate,
				unsigned long *prate)
{ … }

static int clk_factor_set_rate(struct clk_hw *hw, unsigned long rate,
				unsigned long parent_rate)
{ … }

static unsigned long clk_factor_recalc_accuracy(struct clk_hw *hw,
						unsigned long parent_accuracy)
{ … }

const struct clk_ops clk_fixed_factor_ops = …;
EXPORT_SYMBOL_GPL(…);

static void devm_clk_hw_register_fixed_factor_release(struct device *dev, void *res)
{ … }

static struct clk_hw *
__clk_hw_register_fixed_factor(struct device *dev, struct device_node *np,
		const char *name, const char *parent_name,
		const struct clk_hw *parent_hw, const struct clk_parent_data *pdata,
		unsigned long flags, unsigned int mult, unsigned int div,
		unsigned long acc, unsigned int fixflags, bool devm)
{ … }

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

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

struct clk_hw *clk_hw_register_fixed_factor_parent_hw(struct device *dev,
		const char *name, const struct clk_hw *parent_hw,
		unsigned long flags, unsigned int mult, unsigned int div)
{ … }
EXPORT_SYMBOL_GPL(…);

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)
{ … }
EXPORT_SYMBOL_GPL(…);

struct clk_hw *clk_hw_register_fixed_factor_fwname(struct device *dev,
		struct device_node *np, const char *name, const char *fw_name,
		unsigned long flags, unsigned int mult, unsigned int div)
{ … }
EXPORT_SYMBOL_GPL(…);

struct clk_hw *clk_hw_register_fixed_factor_with_accuracy_fwname(struct device *dev,
		struct device_node *np, const char *name, const char *fw_name,
		unsigned long flags, unsigned int mult, unsigned int div,
		unsigned long acc)
{ … }
EXPORT_SYMBOL_GPL(…);

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)
{ … }
EXPORT_SYMBOL_GPL(…);

void clk_unregister_fixed_factor(struct clk *clk)
{ … }
EXPORT_SYMBOL_GPL(…);

void clk_hw_unregister_fixed_factor(struct clk_hw *hw)
{ … }
EXPORT_SYMBOL_GPL(…);

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)
{ … }
EXPORT_SYMBOL_GPL(…);

struct clk_hw *devm_clk_hw_register_fixed_factor_fwname(struct device *dev,
		struct device_node *np, const char *name, const char *fw_name,
		unsigned long flags, unsigned int mult, unsigned int div)
{ … }
EXPORT_SYMBOL_GPL(…);

struct clk_hw *devm_clk_hw_register_fixed_factor_with_accuracy_fwname(struct device *dev,
		struct device_node *np, const char *name, const char *fw_name,
		unsigned long flags, unsigned int mult, unsigned int div,
		unsigned long acc)
{ … }
EXPORT_SYMBOL_GPL(…);

#ifdef CONFIG_OF
static struct clk_hw *_of_fixed_factor_clk_setup(struct device_node *node)
{ … }

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

static void of_fixed_factor_clk_remove(struct platform_device *pdev)
{ … }

static int of_fixed_factor_clk_probe(struct platform_device *pdev)
{ … }

static const struct of_device_id of_fixed_factor_clk_ids[] = …;
MODULE_DEVICE_TABLE(of, of_fixed_factor_clk_ids);

static struct platform_driver of_fixed_factor_clk_driver = …;
builtin_platform_driver(…) …;
#endif
linux/drivers/clk/clk-fixed-factor.c
