linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Copyright (C) 2010-2011 Canonical Ltd <jeremy.kerr@canonical.com>

 * Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org>

 *

 * Standard functionality for the common clock API.  See Documentation/driver-api/clk.rst

 */

​

#include <linux/clk.h>

#include <linux/clk-provider.h>

#include <linux/clk/clk-conf.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/spinlock.h>

#include <linux/err.h>

#include <linux/list.h>

#include <linux/slab.h>

#include <linux/of.h>

#include <linux/device.h>

#include <linux/init.h>

#include <linux/pm_runtime.h>

#include <linux/sched.h>

#include <linux/clkdev.h>

​

#include "clk.h"

​

static DEFINE_SPINLOCK(enable_lock);

static DEFINE_MUTEX(prepare_lock);

​

static struct task_struct *prepare_owner;

static struct task_struct *enable_owner;

​

static int prepare_refcnt;

static int enable_refcnt;

​

static HLIST_HEAD(clk_root_list);

static HLIST_HEAD(clk_orphan_list);

static LIST_HEAD(clk_notifier_list);

​

/***    private data structures    ***/

​

struct clk_core {

    const char      *name;

    const struct clk_ops    *ops;

    struct clk_hw       *hw;

    struct module       *owner;

    struct device       *dev;

    struct clk_core     *parent;

    const char      **parent_names;

    struct clk_core     **parents;

    u8          num_parents;

    u8          new_parent_index;

    unsigned long       rate;

    unsigned long       req_rate;

    unsigned long       new_rate;

    struct clk_core     *new_parent;

    struct clk_core     *new_child;

    unsigned long       flags;

    bool            orphan;

    bool            rpm_enabled;

    unsigned int        enable_count;

    unsigned int        prepare_count;

    unsigned int        protect_count;

    unsigned long       min_rate;

    unsigned long       max_rate;

    unsigned long       accuracy;

    int         phase;

    struct clk_duty     duty;

    struct hlist_head   children;

    struct hlist_node   child_node;

    struct hlist_head   clks;

    unsigned int        notifier_count;

#ifdef CONFIG_DEBUG_FS

    struct dentry       *dentry;

    struct hlist_node   debug_node;

#endif

    struct kref     ref;

};

​

#define CREATE_TRACE_POINTS

#include <trace/events/clk.h>

​

struct clk {

    struct clk_core *core;

    struct device *dev;

    const char *dev_id;

    const char *con_id;

    unsigned long min_rate;

    unsigned long max_rate;

    unsigned int exclusive_count;

    struct hlist_node clks_node;

};