示例#1
0
static int sfi_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
	policy->shared_type = CPUFREQ_SHARED_TYPE_HW;
	policy->cpuinfo.transition_latency = 100000;	/* 100us */

	return cpufreq_table_validate_and_show(policy, freq_table);
}
示例#2
0
文件: sc520_freq.c 项目: 020gzh/linux
static int sc520_freq_cpu_init(struct cpufreq_policy *policy)
{
	struct cpuinfo_x86 *c = &cpu_data(0);

	/* capability check */
	if (c->x86_vendor != X86_VENDOR_AMD ||
	    c->x86 != 4 || c->x86_model != 9)
		return -ENODEV;

	/* cpuinfo and default policy values */
	policy->cpuinfo.transition_latency = 1000000; /* 1ms */

	return cpufreq_table_validate_and_show(policy, sc520_freq_table);
}
示例#3
0
/* Per-CPU initialization */
static int bL_cpufreq_init(struct cpufreq_policy *policy)
{
	u32 cur_cluster = cpu_to_cluster(policy->cpu);
	struct device *cpu_dev;
	int ret;

	cpu_dev = get_cpu_device(policy->cpu);
	if (!cpu_dev) {
		pr_err("%s: failed to get cpu%d device\n", __func__,
				policy->cpu);
		return -ENODEV;
	}

	ret = get_cluster_clk_and_freq_table(cpu_dev);
	if (ret)
		return ret;

	ret = cpufreq_table_validate_and_show(policy, freq_table[cur_cluster]);
	if (ret) {
		dev_err(cpu_dev, "CPU %d, cluster: %d invalid freq table\n",
				policy->cpu, cur_cluster);
		put_cluster_clk_and_freq_table(cpu_dev);
		return ret;
	}

	if (cur_cluster < MAX_CLUSTERS) {
		int cpu;

		cpumask_copy(policy->cpus, topology_core_cpumask(policy->cpu));

		for_each_cpu(cpu, policy->cpus)
			per_cpu(physical_cluster, cpu) = cur_cluster;
	} else {
		/* Assumption: during init, we are always running on A15 */
		per_cpu(physical_cluster, policy->cpu) = A15_CLUSTER;
	}

	if (arm_bL_ops->get_transition_latency)
		policy->cpuinfo.transition_latency =
			arm_bL_ops->get_transition_latency(cpu_dev);
	else
		policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;

	if (is_bL_switching_enabled())
		per_cpu(cpu_last_req_freq, policy->cpu) = clk_get_cpu_rate(policy->cpu);

	dev_info(cpu_dev, "%s: CPU %d initialized\n", __func__, policy->cpu);
	return 0;
}
示例#4
0
static int mtk_cpufreq_init(struct cpufreq_policy *policy)
{
    struct mtk_cpu_dvfs_info *info;
    struct cpufreq_frequency_table *freq_table;
    int ret;

    info = kzalloc(sizeof(*info), GFP_KERNEL);
    if (!info)
        return -ENOMEM;

    ret = mtk_cpu_dvfs_info_init(info, policy->cpu);
    if (ret) {
        pr_err("%s failed to initialize dvfs info for cpu%d\n",
               __func__, policy->cpu);
        goto out_free_dvfs_info;
    }

    ret = dev_pm_opp_init_cpufreq_table(info->cpu_dev, &freq_table);
    if (ret) {
        pr_err("failed to init cpufreq table for cpu%d: %d\n",
               policy->cpu, ret);
        goto out_release_dvfs_info;
    }

    ret = cpufreq_table_validate_and_show(policy, freq_table);
    if (ret) {
        pr_err("%s: invalid frequency table: %d\n", __func__, ret);
        goto out_free_cpufreq_table;
    }

    /* CPUs in the same cluster share a clock and power domain. */
    cpumask_copy(policy->cpus, &cpu_topology[policy->cpu].core_sibling);
    policy->driver_data = info;
    policy->clk = info->cpu_clk;

    return 0;

out_free_cpufreq_table:
    dev_pm_opp_free_cpufreq_table(info->cpu_dev, &freq_table);

out_release_dvfs_info:
    mtk_cpu_dvfs_info_release(info);

out_free_dvfs_info:
    kfree(info);

    return ret;
}
static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
{
	struct cpuinfo_x86 *c = &cpu_data(policy->cpu);
	int cpuid = 0;
	unsigned int i;

#ifdef CONFIG_SMP
	cpumask_copy(policy->cpus, topology_sibling_cpumask(policy->cpu));
#endif

	/* Errata workaround */
	cpuid = (c->x86 << 8) | (c->x86_model << 4) | c->x86_mask;
	switch (cpuid) {
	case 0x0f07:
	case 0x0f0a:
	case 0x0f11:
	case 0x0f12:
		has_N44_O17_errata[policy->cpu] = 1;
		pr_debug("has errata -- disabling low frequencies\n");
	}

	if (speedstep_detect_processor() == SPEEDSTEP_CPU_P4D &&
	    c->x86_model < 2) {
		/* switch to maximum frequency and measure result */
		cpufreq_p4_setdc(policy->cpu, DC_DISABLE);
		recalibrate_cpu_khz();
	}
	/* get max frequency */
	stock_freq = cpufreq_p4_get_frequency(c);
	if (!stock_freq)
		return -EINVAL;

	/* table init */
	for (i = 1; (p4clockmod_table[i].frequency != CPUFREQ_TABLE_END); i++) {
		if ((i < 2) && (has_N44_O17_errata[policy->cpu]))
			p4clockmod_table[i].frequency = CPUFREQ_ENTRY_INVALID;
		else
			p4clockmod_table[i].frequency = (stock_freq * i)/8;
	}

	/* cpuinfo and default policy values */

	/* the transition latency is set to be 1 higher than the maximum
	 * transition latency of the ondemand governor */
	policy->cpuinfo.transition_latency = 10000001;

	return cpufreq_table_validate_and_show(policy, &p4clockmod_table[0]);
}
示例#6
0
static int speedstep_cpu_init(struct cpufreq_policy *policy)
{
	unsigned int policy_cpu;
	struct get_freqs gf;

	/* only run on CPU to be set, or on its sibling */
#ifdef CONFIG_SMP
	cpumask_copy(policy->cpus, cpu_sibling_mask(policy->cpu));
#endif
	policy_cpu = cpumask_any_and(policy->cpus, cpu_online_mask);

	/* detect low and high frequency and transition latency */
	gf.policy = policy;
	smp_call_function_single(policy_cpu, get_freqs_on_cpu, &gf, 1);
	if (gf.ret)
		return gf.ret;

	return cpufreq_table_validate_and_show(policy, speedstep_freqs);
}
static int speedstep_cpu_init(struct cpufreq_policy *policy)
{
	int result;
	unsigned int *low, *high;

	/* capability check */
	if (policy->cpu != 0)
		return -ENODEV;

	result = speedstep_smi_ownership();
	if (result) {
		pr_debug("fails in acquiring ownership of a SMI interface.\n");
		return -EINVAL;
	}

	/* detect low and high frequency */
	low = &speedstep_freqs[SPEEDSTEP_LOW].frequency;
	high = &speedstep_freqs[SPEEDSTEP_HIGH].frequency;

	result = speedstep_smi_get_freqs(low, high);
	if (result) {
		/* fall back to speedstep_lib.c dection mechanism:
		 * try both states out */
		pr_debug("could not detect low and high frequencies "
				"by SMI call.\n");
		result = speedstep_get_freqs(speedstep_processor,
				low, high,
				NULL,
				&speedstep_set_state);

		if (result) {
			pr_debug("could not detect two different speeds"
					" -- aborting.\n");
			return result;
		} else
			pr_debug("workaround worked.\n");
	}

	policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
	return cpufreq_table_validate_and_show(policy, speedstep_freqs);
}
示例#8
0
static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
	unsigned int i;
	unsigned int valid_states = 0;
	unsigned int cpu = policy->cpu;
	struct acpi_cpufreq_data *data;
	unsigned int result = 0;
	struct cpuinfo_x86 *c = &cpu_data(policy->cpu);
	struct acpi_processor_performance *perf;
#ifdef CONFIG_SMP
	static int blacklisted;
#endif

	pr_debug("acpi_cpufreq_cpu_init\n");

#ifdef CONFIG_SMP
	if (blacklisted)
		return blacklisted;
	blacklisted = acpi_cpufreq_blacklist(c);
	if (blacklisted)
		return blacklisted;
#endif

	data = kzalloc(sizeof(*data), GFP_KERNEL);
	if (!data)
		return -ENOMEM;

	if (!zalloc_cpumask_var(&data->freqdomain_cpus, GFP_KERNEL)) {
		result = -ENOMEM;
		goto err_free;
	}

	perf = per_cpu_ptr(acpi_perf_data, cpu);
	data->acpi_perf_cpu = cpu;
	policy->driver_data = data;

	if (cpu_has(c, X86_FEATURE_CONSTANT_TSC))
		acpi_cpufreq_driver.flags |= CPUFREQ_CONST_LOOPS;

	result = acpi_processor_register_performance(perf, cpu);
	if (result)
		goto err_free_mask;

	policy->shared_type = perf->shared_type;

	/*
	 * Will let policy->cpus know about dependency only when software
	 * coordination is required.
	 */
	if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL ||
	    policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) {
		cpumask_copy(policy->cpus, perf->shared_cpu_map);
	}
	cpumask_copy(data->freqdomain_cpus, perf->shared_cpu_map);

#ifdef CONFIG_SMP
	dmi_check_system(sw_any_bug_dmi_table);
	if (bios_with_sw_any_bug && !policy_is_shared(policy)) {
		policy->shared_type = CPUFREQ_SHARED_TYPE_ALL;
		cpumask_copy(policy->cpus, topology_core_cpumask(cpu));
	}

	if (check_amd_hwpstate_cpu(cpu) && !acpi_pstate_strict) {
		cpumask_clear(policy->cpus);
		cpumask_set_cpu(cpu, policy->cpus);
		cpumask_copy(data->freqdomain_cpus,
			     topology_sibling_cpumask(cpu));
		policy->shared_type = CPUFREQ_SHARED_TYPE_HW;
		pr_info_once(PFX "overriding BIOS provided _PSD data\n");
	}
#endif

	/* capability check */
	if (perf->state_count <= 1) {
		pr_debug("No P-States\n");
		result = -ENODEV;
		goto err_unreg;
	}

	if (perf->control_register.space_id != perf->status_register.space_id) {
		result = -ENODEV;
		goto err_unreg;
	}

	switch (perf->control_register.space_id) {
	case ACPI_ADR_SPACE_SYSTEM_IO:
		if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD &&
		    boot_cpu_data.x86 == 0xf) {
			pr_debug("AMD K8 systems must use native drivers.\n");
			result = -ENODEV;
			goto err_unreg;
		}
		pr_debug("SYSTEM IO addr space\n");
		data->cpu_feature = SYSTEM_IO_CAPABLE;
		break;
	case ACPI_ADR_SPACE_FIXED_HARDWARE:
		pr_debug("HARDWARE addr space\n");
		if (check_est_cpu(cpu)) {
			data->cpu_feature = SYSTEM_INTEL_MSR_CAPABLE;
			break;
		}
		if (check_amd_hwpstate_cpu(cpu)) {
			data->cpu_feature = SYSTEM_AMD_MSR_CAPABLE;
			break;
		}
		result = -ENODEV;
		goto err_unreg;
	default:
		pr_debug("Unknown addr space %d\n",
			(u32) (perf->control_register.space_id));
		result = -ENODEV;
		goto err_unreg;
	}

	data->freq_table = kzalloc(sizeof(*data->freq_table) *
		    (perf->state_count+1), GFP_KERNEL);
	if (!data->freq_table) {
		result = -ENOMEM;
		goto err_unreg;
	}

	/* detect transition latency */
	policy->cpuinfo.transition_latency = 0;
	for (i = 0; i < perf->state_count; i++) {
		if ((perf->states[i].transition_latency * 1000) >
		    policy->cpuinfo.transition_latency)
			policy->cpuinfo.transition_latency =
			    perf->states[i].transition_latency * 1000;
	}

	/* Check for high latency (>20uS) from buggy BIOSes, like on T42 */
	if (perf->control_register.space_id == ACPI_ADR_SPACE_FIXED_HARDWARE &&
	    policy->cpuinfo.transition_latency > 20 * 1000) {
		policy->cpuinfo.transition_latency = 20 * 1000;
		printk_once(KERN_INFO
			    "P-state transition latency capped at 20 uS\n");
	}

	/* table init */
	for (i = 0; i < perf->state_count; i++) {
		if (i > 0 && perf->states[i].core_frequency >=
		    data->freq_table[valid_states-1].frequency / 1000)
			continue;

		data->freq_table[valid_states].driver_data = i;
		data->freq_table[valid_states].frequency =
		    perf->states[i].core_frequency * 1000;
		valid_states++;
	}
	data->freq_table[valid_states].frequency = CPUFREQ_TABLE_END;
	perf->state = 0;

	result = cpufreq_table_validate_and_show(policy, data->freq_table);
	if (result)
		goto err_freqfree;

	if (perf->states[0].core_frequency * 1000 != policy->cpuinfo.max_freq)
		printk(KERN_WARNING FW_WARN "P-state 0 is not max freq\n");

	switch (perf->control_register.space_id) {
	case ACPI_ADR_SPACE_SYSTEM_IO:
		/*
		 * The core will not set policy->cur, because
		 * cpufreq_driver->get is NULL, so we need to set it here.
		 * However, we have to guess it, because the current speed is
		 * unknown and not detectable via IO ports.
		 */
		policy->cur = acpi_cpufreq_guess_freq(data, policy->cpu);
		break;
	case ACPI_ADR_SPACE_FIXED_HARDWARE:
		acpi_cpufreq_driver.get = get_cur_freq_on_cpu;
		break;
	default:
		break;
	}

	/* notify BIOS that we exist */
	acpi_processor_notify_smm(THIS_MODULE);

	pr_debug("CPU%u - ACPI performance management activated.\n", cpu);
	for (i = 0; i < perf->state_count; i++)
		pr_debug("     %cP%d: %d MHz, %d mW, %d uS\n",
			(i == perf->state ? '*' : ' '), i,
			(u32) perf->states[i].core_frequency,
			(u32) perf->states[i].power,
			(u32) perf->states[i].transition_latency);

	/*
	 * the first call to ->target() should result in us actually
	 * writing something to the appropriate registers.
	 */
	data->resume = 1;

	return result;

err_freqfree:
	kfree(data->freq_table);
err_unreg:
	acpi_processor_unregister_performance(cpu);
err_free_mask:
	free_cpumask_var(data->freqdomain_cpus);
err_free:
	kfree(data);
	policy->driver_data = NULL;

	return result;
}
示例#9
0
static int cpufreq_init(struct cpufreq_policy *policy)
{
	struct cpufreq_dt_platform_data *pd;
	struct cpufreq_frequency_table *freq_table;
	struct thermal_cooling_device *cdev;
	struct device_node *np;
	struct private_data *priv;
	struct device *cpu_dev;
	struct regulator *cpu_reg;
	struct clk *cpu_clk;
	unsigned long min_uV = ~0, max_uV = 0;
	unsigned int transition_latency;
	int ret;

	ret = allocate_resources(policy->cpu, &cpu_dev, &cpu_reg, &cpu_clk);
	if (ret) {
		pr_err("%s: Failed to allocate resources\n: %d", __func__, ret);
		return ret;
	}

	np = of_node_get(cpu_dev->of_node);
	if (!np) {
		dev_err(cpu_dev, "failed to find cpu%d node\n", policy->cpu);
		ret = -ENOENT;
		goto out_put_reg_clk;
	}

	/* OPPs might be populated at runtime, don't check for error here */
	of_init_opp_table(cpu_dev);

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		ret = -ENOMEM;
		goto out_put_node;
	}

	of_property_read_u32(np, "voltage-tolerance", &priv->voltage_tolerance);

	if (of_property_read_u32(np, "clock-latency", &transition_latency))
		transition_latency = CPUFREQ_ETERNAL;

	if (!IS_ERR(cpu_reg)) {
		unsigned long opp_freq = 0;

		/*
		 * Disable any OPPs where the connected regulator isn't able to
		 * provide the specified voltage and record minimum and maximum
		 * voltage levels.
		 */
		while (1) {
			struct dev_pm_opp *opp;
			unsigned long opp_uV, tol_uV;

			rcu_read_lock();
			opp = dev_pm_opp_find_freq_ceil(cpu_dev, &opp_freq);
			if (IS_ERR(opp)) {
				rcu_read_unlock();
				break;
			}
			opp_uV = dev_pm_opp_get_voltage(opp);
			rcu_read_unlock();

			tol_uV = opp_uV * priv->voltage_tolerance / 100;
			if (regulator_is_supported_voltage(cpu_reg, opp_uV,
							   opp_uV + tol_uV)) {
				if (opp_uV < min_uV)
					min_uV = opp_uV;
				if (opp_uV > max_uV)
					max_uV = opp_uV;
			} else {
				dev_pm_opp_disable(cpu_dev, opp_freq);
			}

			opp_freq++;
		}

		ret = regulator_set_voltage_time(cpu_reg, min_uV, max_uV);
		if (ret > 0)
			transition_latency += ret * 1000;
	}

	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
	if (ret) {
		pr_err("failed to init cpufreq table: %d\n", ret);
		goto out_free_priv;
	}

	/*
	 * For now, just loading the cooling device;
	 * thermal DT code takes care of matching them.
	 */
	if (of_find_property(np, "#cooling-cells", NULL)) {
		cdev = of_cpufreq_cooling_register(np, cpu_present_mask);
		if (IS_ERR(cdev))
			dev_err(cpu_dev,
				"running cpufreq without cooling device: %ld\n",
				PTR_ERR(cdev));
		else
			priv->cdev = cdev;
	}

	priv->cpu_dev = cpu_dev;
	priv->cpu_reg = cpu_reg;
	policy->driver_data = priv;

	policy->clk = cpu_clk;
	ret = cpufreq_table_validate_and_show(policy, freq_table);
	if (ret) {
		dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__,
			ret);
		goto out_cooling_unregister;
	}

	policy->cpuinfo.transition_latency = transition_latency;

	pd = cpufreq_get_driver_data();
	if (!pd || !pd->independent_clocks)
		cpumask_setall(policy->cpus);

	of_node_put(np);

	return 0;

out_cooling_unregister:
	cpufreq_cooling_unregister(priv->cdev);
	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
out_free_priv:
	kfree(priv);
out_put_node:
	of_node_put(np);
out_put_reg_clk:
	clk_put(cpu_clk);
	if (!IS_ERR(cpu_reg))
		regulator_put(cpu_reg);

	return ret;
}
示例#10
0
static int scpi_cpufreq_init(struct cpufreq_policy *policy)
{
	int ret;
	unsigned int latency;
	struct device *cpu_dev;
	struct scpi_data *priv;
	struct cpufreq_frequency_table *freq_table;

	cpu_dev = get_cpu_device(policy->cpu);
	if (!cpu_dev) {
		pr_err("failed to get cpu%d device\n", policy->cpu);
		return -ENODEV;
	}

	ret = scpi_ops->add_opps_to_device(cpu_dev);
	if (ret) {
		dev_warn(cpu_dev, "failed to add opps to the device\n");
		return ret;
	}

	ret = scpi_get_sharing_cpus(cpu_dev, policy->cpus);
	if (ret) {
		dev_warn(cpu_dev, "failed to get sharing cpumask\n");
		return ret;
	}

	ret = dev_pm_opp_set_sharing_cpus(cpu_dev, policy->cpus);
	if (ret) {
		dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n",
			__func__, ret);
		return ret;
	}

	ret = dev_pm_opp_get_opp_count(cpu_dev);
	if (ret <= 0) {
		dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n");
		ret = -EPROBE_DEFER;
		goto out_free_opp;
	}

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		ret = -ENOMEM;
		goto out_free_opp;
	}

	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
	if (ret) {
		dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret);
		goto out_free_priv;
	}

	priv->cpu_dev = cpu_dev;
	priv->clk = clk_get(cpu_dev, NULL);
	if (IS_ERR(priv->clk)) {
		dev_err(cpu_dev, "%s: Failed to get clk for cpu: %d\n",
			__func__, cpu_dev->id);
		ret = PTR_ERR(priv->clk);
		goto out_free_cpufreq_table;
	}

	policy->driver_data = priv;

	ret = cpufreq_table_validate_and_show(policy, freq_table);
	if (ret) {
		dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__,
			ret);
		goto out_put_clk;
	}

	/* scpi allows DVFS request for any domain from any CPU */
	policy->dvfs_possible_from_any_cpu = true;

	latency = scpi_ops->get_transition_latency(cpu_dev);
	if (!latency)
		latency = CPUFREQ_ETERNAL;

	policy->cpuinfo.transition_latency = latency;

	policy->fast_switch_possible = false;
	return 0;

out_put_clk:
	clk_put(priv->clk);
out_free_cpufreq_table:
	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
out_free_priv:
	kfree(priv);
out_free_opp:
	dev_pm_opp_cpumask_remove_table(policy->cpus);

	return ret;
}
示例#11
0
文件: cpufreq-dt.c 项目: 020gzh/linux
static int cpufreq_init(struct cpufreq_policy *policy)
{
	struct cpufreq_frequency_table *freq_table;
	struct private_data *priv;
	struct device *cpu_dev;
	struct clk *cpu_clk;
	struct dev_pm_opp *suspend_opp;
	unsigned int transition_latency;
	bool opp_v1 = false;
	const char *name;
	int ret;

	cpu_dev = get_cpu_device(policy->cpu);
	if (!cpu_dev) {
		pr_err("failed to get cpu%d device\n", policy->cpu);
		return -ENODEV;
	}

	cpu_clk = clk_get(cpu_dev, NULL);
	if (IS_ERR(cpu_clk)) {
		ret = PTR_ERR(cpu_clk);
		dev_err(cpu_dev, "%s: failed to get clk: %d\n", __func__, ret);
		return ret;
	}

	/* Get OPP-sharing information from "operating-points-v2" bindings */
	ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, policy->cpus);
	if (ret) {
		/*
		 * operating-points-v2 not supported, fallback to old method of
		 * finding shared-OPPs for backward compatibility.
		 */
		if (ret == -ENOENT)
			opp_v1 = true;
		else
			goto out_put_clk;
	}

	/*
	 * OPP layer will be taking care of regulators now, but it needs to know
	 * the name of the regulator first.
	 */
	name = find_supply_name(cpu_dev);
	if (name) {
		ret = dev_pm_opp_set_regulator(cpu_dev, name);
		if (ret) {
			dev_err(cpu_dev, "Failed to set regulator for cpu%d: %d\n",
				policy->cpu, ret);
			goto out_put_clk;
		}
	}

	/*
	 * Initialize OPP tables for all policy->cpus. They will be shared by
	 * all CPUs which have marked their CPUs shared with OPP bindings.
	 *
	 * For platforms not using operating-points-v2 bindings, we do this
	 * before updating policy->cpus. Otherwise, we will end up creating
	 * duplicate OPPs for policy->cpus.
	 *
	 * OPPs might be populated at runtime, don't check for error here
	 */
	dev_pm_opp_of_cpumask_add_table(policy->cpus);

	/*
	 * But we need OPP table to function so if it is not there let's
	 * give platform code chance to provide it for us.
	 */
	ret = dev_pm_opp_get_opp_count(cpu_dev);
	if (ret <= 0) {
		dev_dbg(cpu_dev, "OPP table is not ready, deferring probe\n");
		ret = -EPROBE_DEFER;
		goto out_free_opp;
	}

	if (opp_v1) {
		struct cpufreq_dt_platform_data *pd = cpufreq_get_driver_data();

		if (!pd || !pd->independent_clocks)
			cpumask_setall(policy->cpus);

		/*
		 * OPP tables are initialized only for policy->cpu, do it for
		 * others as well.
		 */
		ret = dev_pm_opp_set_sharing_cpus(cpu_dev, policy->cpus);
		if (ret)
			dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n",
				__func__, ret);
	}

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		ret = -ENOMEM;
		goto out_free_opp;
	}

	priv->reg_name = name;

	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &freq_table);
	if (ret) {
		dev_err(cpu_dev, "failed to init cpufreq table: %d\n", ret);
		goto out_free_priv;
	}

	priv->cpu_dev = cpu_dev;
	policy->driver_data = priv;
	policy->clk = cpu_clk;

	rcu_read_lock();
	suspend_opp = dev_pm_opp_get_suspend_opp(cpu_dev);
	if (suspend_opp)
		policy->suspend_freq = dev_pm_opp_get_freq(suspend_opp) / 1000;
	rcu_read_unlock();

	ret = cpufreq_table_validate_and_show(policy, freq_table);
	if (ret) {
		dev_err(cpu_dev, "%s: invalid frequency table: %d\n", __func__,
			ret);
		goto out_free_cpufreq_table;
	}

	/* Support turbo/boost mode */
	if (policy_has_boost_freq(policy)) {
		/* This gets disabled by core on driver unregister */
		ret = cpufreq_enable_boost_support();
		if (ret)
			goto out_free_cpufreq_table;
		cpufreq_dt_attr[1] = &cpufreq_freq_attr_scaling_boost_freqs;
	}

	transition_latency = dev_pm_opp_get_max_transition_latency(cpu_dev);
	if (!transition_latency)
		transition_latency = CPUFREQ_ETERNAL;

	policy->cpuinfo.transition_latency = transition_latency;

	return 0;

out_free_cpufreq_table:
	dev_pm_opp_free_cpufreq_table(cpu_dev, &freq_table);
out_free_priv:
	kfree(priv);
out_free_opp:
	dev_pm_opp_of_cpumask_remove_table(policy->cpus);
	if (name)
		dev_pm_opp_put_regulator(cpu_dev);
out_put_clk:
	clk_put(cpu_clk);

	return ret;
}