linux/drivers/cpufreq/sti-cpufreq.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Match running platform with pre-defined OPP values for CPUFreq
 *
 * Author: Ajit Pal Singh <[email protected]>
 *         Lee Jones <[email protected]>
 *
 * Copyright (C) 2015 STMicroelectronics (R&D) Limited
 */

#include <linux/cpu.h>
#include <linux/io.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/regmap.h>

#define VERSION_ELEMENTS …
#define MAX_PCODE_NAME_LEN …

#define VERSION_SHIFT …
#define HW_INFO_INDEX …
#define MAJOR_ID_INDEX …
#define MINOR_ID_INDEX …

/*
 * Only match on "suitable for ALL versions" entries
 *
 * This will be used with the BIT() macro.  It sets the
 * top bit of a 32bit value and is equal to 0x80000000.
 */
#define DEFAULT_VERSION …

enum { … };

/**
 * struct sti_cpufreq_ddata - ST CPUFreq Driver Data
 *
 * @cpu:		CPU's OF node
 * @syscfg_eng:		Engineering Syscon register map
 * @syscfg:		Syscon register map
 */
static struct sti_cpufreq_ddata { … } ddata;

static int sti_cpufreq_fetch_major(void) { … }

static int sti_cpufreq_fetch_minor(void)
{ … }

static int sti_cpufreq_fetch_regmap_field(const struct reg_field *reg_fields,
					  int hw_info_offset, int field)
{ … }

static const struct reg_field sti_stih407_dvfs_regfields[DVFS_MAX_REGFIELDS] = …;

static const struct reg_field *sti_cpufreq_match(void)
{ … }

static int sti_cpufreq_set_opp_info(void)
{ … }

static int sti_cpufreq_fetch_syscon_registers(void)
{ … }

static int __init sti_cpufreq_init(void)
{ … }
module_init(…) …;

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

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