linux/drivers/cpufreq/qoriq-cpufreq.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2013 Freescale Semiconductor, Inc.
 *
 * CPU Frequency Scaling driver for Freescale QorIQ SoCs.
 */

#define pr_fmt(fmt) …

#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/cpufreq.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/smp.h>
#include <linux/platform_device.h>

/**
 * struct cpu_data
 * @pclk: the parent clock of cpu
 * @table: frequency table
 */
struct cpu_data { … };

/**
 * struct soc_data - SoC specific data
 * @flags: SOC_xxx
 */
struct soc_data { … };

static u32 get_bus_freq(void)
{ … }

static struct clk *cpu_to_clk(int cpu)
{ … }

/* traverse cpu nodes to get cpu mask of sharing clock wire */
static void set_affected_cpus(struct cpufreq_policy *policy)
{ … }

/* reduce the duplicated frequencies in frequency table */
static void freq_table_redup(struct cpufreq_frequency_table *freq_table,
		int count)
{ … }

/* sort the frequencies in frequency table in descenting order */
static void freq_table_sort(struct cpufreq_frequency_table *freq_table,
		int count)
{ … }

static int qoriq_cpufreq_cpu_init(struct cpufreq_policy *policy)
{ … }

static void qoriq_cpufreq_cpu_exit(struct cpufreq_policy *policy)
{ … }

static int qoriq_cpufreq_target(struct cpufreq_policy *policy,
		unsigned int index)
{ … }

static struct cpufreq_driver qoriq_cpufreq_driver = …;

static const struct of_device_id qoriq_cpufreq_blacklist[] = …;

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

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

static struct platform_driver qoriq_cpufreq_platform_driver = …;
module_platform_driver(…) …;

MODULE_ALIAS(…) …;
MODULE_LICENSE(…) …;
MODULE_AUTHOR(…) …;
MODULE_DESCRIPTION(…) …;