linux/drivers/clk/clk-fixed-rate.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2010-2011 Canonical Ltd <[email protected]>
 * Copyright (C) 2011-2012 Mike Turquette, Linaro Ltd <[email protected]>
 *
 * Fixed rate clock implementation
 */

#include <linux/clk-provider.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/platform_device.h>

/*
 * DOC: basic fixed-rate clock that cannot gate
 *
 * Traits of this clock:
 * prepare - clk_(un)prepare only ensures parents are prepared
 * enable - clk_enable only ensures parents are enabled
 * rate - rate is always a fixed value.  No clk_set_rate support
 * parent - fixed parent.  No clk_set_parent support
 */

#define to_clk_fixed_rate(_hw) …

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

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

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

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

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, bool devm)
{ … }
EXPORT_SYMBOL_GPL(…);

struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
		const char *parent_name, unsigned long flags,
		unsigned long fixed_rate)
{ … }
EXPORT_SYMBOL_GPL(…);

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

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

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

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

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

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

static const struct of_device_id of_fixed_clk_ids[] = …;

static struct platform_driver of_fixed_clk_driver = …;
builtin_platform_driver(…) …;
#endif