linux-imx

// SPDX-License-Identifier: GPL-2.0-only

/*

 * TI CPUFreq/OPP hw-supported driver

 *

 * Copyright (C) 2016-2017 Texas Instruments, Inc.

 *   Dave Gerlach <d-gerlach@ti.com>

 */

​

#include <linux/cpu.h>

#include <linux/io.h>

#include <linux/mfd/syscon.h>

#include <linux/module.h>

#include <linux/init.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/pm_opp.h>

#include <linux/regmap.h>

#include <linux/slab.h>

​

#define REVISION_MASK               0xF

#define REVISION_SHIFT              28

​

#define AM33XX_800M_ARM_MPU_MAX_FREQ        0x1E2F

#define AM43XX_600M_ARM_MPU_MAX_FREQ        0xFFA

​

#define DRA7_EFUSE_HAS_OD_MPU_OPP       11

#define DRA7_EFUSE_HAS_HIGH_MPU_OPP     15

#define DRA7_EFUSE_HAS_ALL_MPU_OPP      23

​

#define DRA7_EFUSE_NOM_MPU_OPP          BIT(0)

#define DRA7_EFUSE_OD_MPU_OPP           BIT(1)

#define DRA7_EFUSE_HIGH_MPU_OPP         BIT(2)

​

#define VERSION_COUNT               2

​

struct ti_cpufreq_data;

​

struct ti_cpufreq_soc_data {

    unsigned long (*efuse_xlate)(struct ti_cpufreq_data *opp_data,

                     unsigned long efuse);

    unsigned long efuse_fallback;

    unsigned long efuse_offset;

    unsigned long efuse_mask;

    unsigned long efuse_shift;

    unsigned long rev_offset;

    bool multi_regulator;

};

​

struct ti_cpufreq_data {

    struct device *cpu_dev;

    struct device_node *opp_node;

    struct regmap *syscon;

    const struct ti_cpufreq_soc_data *soc_data;

    struct opp_table *opp_table;

};

​

static unsigned long amx3_efuse_xlate(struct ti_cpufreq_data *opp_data,

                      unsigned long efuse)

{

    if (!efuse)

        efuse = opp_data->soc_data->efuse_fallback;

    /* AM335x and AM437x use "OPP disable" bits, so invert */

    return ~efuse;