1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (C) 2018-2021 ARM Ltd.
11 #include <linux/clk-provider.h>
36 	struct scmi_data *priv = policy->driver_data;  in scmi_cpufreq_get_rate()
40 	ret = perf_ops->freq_get(ph, priv->domain_id, &rate, false);  in scmi_cpufreq_get_rate()
47  * perf_ops->freq_set is not a synchronous, the actual OPP change will
54 	struct scmi_data *priv = policy->driver_data;  in scmi_cpufreq_set_target()
55 	u64 freq = policy->freq_table[index].frequency;  in scmi_cpufreq_set_target()
57 	return perf_ops->freq_set(ph, priv->domain_id, freq * 1000, false);  in scmi_cpufreq_set_target()
63 	struct scmi_data *priv = policy->driver_data;  in scmi_cpufreq_fast_switch()
65 	if (!perf_ops->freq_set(ph, priv->domain_id,  in scmi_cpufreq_fast_switch()
78 	domain = perf_ops->device_domain_id(cpu_dev);  in scmi_get_sharing_cpus()
83 		if (cpu == cpu_dev->id)  in scmi_get_sharing_cpus()
90 		tdomain = perf_ops->device_domain_id(tcpu_dev);  in scmi_get_sharing_cpus()
105 	domain = perf_ops->device_domain_id(cpu_dev);  in scmi_get_cpu_power()
111 	ret = perf_ops->est_power_get(ph, domain, &Hz, power);  in scmi_get_cpu_power()
129 	cpu_dev = get_cpu_device(policy->cpu);  in scmi_cpufreq_init()
131 		pr_err("failed to get cpu%d device\n", policy->cpu);  in scmi_cpufreq_init()
132 		return -ENODEV;  in scmi_cpufreq_init()
137 		return -ENOMEM;  in scmi_cpufreq_init()
139 	if (!zalloc_cpumask_var(&priv->opp_shared_cpus, GFP_KERNEL)) {  in scmi_cpufreq_init()
140 		ret = -ENOMEM;  in scmi_cpufreq_init()
145 	ret = scmi_get_sharing_cpus(cpu_dev, policy->cpus);  in scmi_cpufreq_init()
153 	 * The OPP 'sharing cpus' info may come from DT through an empty opp  in scmi_cpufreq_init()
154 	 * table and opp-shared.  in scmi_cpufreq_init()
156 	ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, priv->opp_shared_cpus);  in scmi_cpufreq_init()
157 	if (ret || !cpumask_weight(priv->opp_shared_cpus)) {  in scmi_cpufreq_init()
159 		 * Either opp-table is not set or no opp-shared was found.  in scmi_cpufreq_init()
160 		 * Use the CPU mask from SCMI to designate CPUs sharing an OPP  in scmi_cpufreq_init()
163 		cpumask_copy(priv->opp_shared_cpus, policy->cpus);  in scmi_cpufreq_init()
167 	  * A previous CPU may have marked OPPs as shared for a few CPUs, based on  in scmi_cpufreq_init()
168 	  * what OPP core provided. If the current CPU is part of those few, then  in scmi_cpufreq_init()
173 		ret = perf_ops->device_opps_add(ph, cpu_dev);  in scmi_cpufreq_init()
184 			ret = -ENODEV;  in scmi_cpufreq_init()
188 		ret = dev_pm_opp_set_sharing_cpus(cpu_dev, priv->opp_shared_cpus);  in scmi_cpufreq_init()
190 			dev_err(cpu_dev, "%s: failed to mark OPPs as shared: %d\n",  in scmi_cpufreq_init()
196 		priv->nr_opp = nr_opp;  in scmi_cpufreq_init()
205 	priv->cpu_dev = cpu_dev;  in scmi_cpufreq_init()
206 	priv->domain_id = perf_ops->device_domain_id(cpu_dev);  in scmi_cpufreq_init()
208 	policy->driver_data = priv;  in scmi_cpufreq_init()
209 	policy->freq_table = freq_table;  in scmi_cpufreq_init()
212 	policy->dvfs_possible_from_any_cpu = true;  in scmi_cpufreq_init()
214 	latency = perf_ops->transition_latency_get(ph, cpu_dev);  in scmi_cpufreq_init()
218 	policy->cpuinfo.transition_latency = latency;  in scmi_cpufreq_init()
220 	policy->fast_switch_possible =  in scmi_cpufreq_init()
221 		perf_ops->fast_switch_possible(ph, cpu_dev);  in scmi_cpufreq_init()
229 	free_cpumask_var(priv->opp_shared_cpus);  in scmi_cpufreq_init()
239 	struct scmi_data *priv = policy->driver_data;  in scmi_cpufreq_exit()
241 	dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &policy->freq_table);  in scmi_cpufreq_exit()
242 	dev_pm_opp_remove_all_dynamic(priv->cpu_dev);  in scmi_cpufreq_exit()
243 	free_cpumask_var(priv->opp_shared_cpus);  in scmi_cpufreq_exit()
252 	bool power_scale_mw = perf_ops->power_scale_mw_get(ph);  in scmi_cpufreq_register_em()
253 	struct scmi_data *priv = policy->driver_data;  in scmi_cpufreq_register_em()
258 	 * policy, some CPUs may still share their perf-domains, and a CPU from  in scmi_cpufreq_register_em()
262 	if (!priv->nr_opp)  in scmi_cpufreq_register_em()
265 	em_dev_register_perf_domain(get_cpu_device(policy->cpu), priv->nr_opp,  in scmi_cpufreq_register_em()
266 				    &em_cb, priv->opp_shared_cpus,  in scmi_cpufreq_register_em()
288 	struct device *dev = &sdev->dev;  in scmi_cpufreq_probe()
291 	handle = sdev->handle;  in scmi_cpufreq_probe()
294 		return -ENODEV;  in scmi_cpufreq_probe()
296 	perf_ops = handle->devm_protocol_get(sdev, SCMI_PROTOCOL_PERF, &ph);  in scmi_cpufreq_probe()
301 	/* dummy clock provider as needed by OPP if clocks property is used */  in scmi_cpufreq_probe()
302 	if (of_find_property(dev->of_node, "#clock-cells", NULL))  in scmi_cpufreq_probe()
327 	.name		= "scmi-cpufreq",