1 // SPDX-License-Identifier: GPL-2.0-only
25 #include "cpufreq-dt.h"
44 		if (cpumask_test_cpu(cpu, priv->cpus))  in cpufreq_dt_find_data()
53 	struct private_data *priv = policy->driver_data;  in set_target()
54 	unsigned long freq = policy->freq_table[index].frequency;  in set_target()
56 	return dev_pm_opp_set_rate(priv->cpu_dev, freq * 1000);  in set_target()
60  * An earlier version of opp-v1 bindings used to name the regulator
61  * "cpu0-supply", we still need to handle that for backwards compatibility.
65 	struct device_node *np __free(device_node) = of_node_get(dev->of_node);  in find_supply_name()
66 	int cpu = dev->id;  in find_supply_name()
73 	if (!cpu && of_property_present(np, "cpu0-supply"))  in find_supply_name()
76 	if (of_property_present(np, "cpu-supply"))  in find_supply_name()
91 	priv = cpufreq_dt_find_data(policy->cpu);  in cpufreq_init()
93 		pr_err("failed to find data for cpu%d\n", policy->cpu);  in cpufreq_init()
94 		return -ENODEV;  in cpufreq_init()
96 	cpu_dev = priv->cpu_dev;  in cpufreq_init()
109 	cpumask_copy(policy->cpus, priv->cpus);  in cpufreq_init()
110 	policy->driver_data = priv;  in cpufreq_init()
111 	policy->clk = cpu_clk;  in cpufreq_init()
112 	policy->freq_table = priv->freq_table;  in cpufreq_init()
113 	policy->suspend_freq = dev_pm_opp_get_suspend_opp_freq(cpu_dev) / 1000;  in cpufreq_init()
114 	policy->cpuinfo.transition_latency = transition_latency;  in cpufreq_init()
115 	policy->dvfs_possible_from_any_cpu = true;  in cpufreq_init()
122 	/* We did light-weight tear down earlier, nothing to do here */  in cpufreq_online()
129 	 * Preserve policy->driver_data and don't free resources on light-weight  in cpufreq_offline()
137 	clk_put(policy->clk);  in cpufreq_exit()
151 	.name = "cpufreq-dt",
153 	.suspend = cpufreq_generic_suspend,
170 		return -EPROBE_DEFER;  in dt_cpufreq_early_init()
174 		return -ENOMEM;  in dt_cpufreq_early_init()
176 	if (!zalloc_cpumask_var(&priv->cpus, GFP_KERNEL))  in dt_cpufreq_early_init()
177 		return -ENOMEM;  in dt_cpufreq_early_init()
179 	cpumask_set_cpu(cpu, priv->cpus);  in dt_cpufreq_early_init()
180 	priv->cpu_dev = cpu_dev;  in dt_cpufreq_early_init()
183 	 * OPP layer will be taking care of regulators now, but it needs to know  in dt_cpufreq_early_init()
188 		priv->opp_token = dev_pm_opp_set_regulators(cpu_dev, reg_name);  in dt_cpufreq_early_init()
189 		if (priv->opp_token < 0) {  in dt_cpufreq_early_init()
190 			ret = dev_err_probe(cpu_dev, priv->opp_token,  in dt_cpufreq_early_init()
196 	/* Get OPP-sharing information from "operating-points-v2" bindings */  in dt_cpufreq_early_init()
197 	ret = dev_pm_opp_of_get_sharing_cpus(cpu_dev, priv->cpus);  in dt_cpufreq_early_init()
199 		if (ret != -ENOENT)  in dt_cpufreq_early_init()
203 		 * operating-points-v2 not supported, fallback to all CPUs share  in dt_cpufreq_early_init()
204 		 * OPP for backward compatibility if the platform hasn't set  in dt_cpufreq_early_init()
207 		if (dev_pm_opp_get_sharing_cpus(cpu_dev, priv->cpus))  in dt_cpufreq_early_init()
212 	 * Initialize OPP tables for all priv->cpus. They will be shared by  in dt_cpufreq_early_init()
213 	 * all CPUs which have marked their CPUs shared with OPP bindings.  in dt_cpufreq_early_init()
215 	 * For platforms not using operating-points-v2 bindings, we do this  in dt_cpufreq_early_init()
216 	 * before updating priv->cpus. Otherwise, we will end up creating  in dt_cpufreq_early_init()
220 	 * it is -EPROBE_DEFER.  in dt_cpufreq_early_init()
222 	ret = dev_pm_opp_of_cpumask_add_table(priv->cpus);  in dt_cpufreq_early_init()
224 		priv->have_static_opps = true;  in dt_cpufreq_early_init()
225 	} else if (ret == -EPROBE_DEFER) {  in dt_cpufreq_early_init()
230 	 * The OPP table must be initialized, statically or dynamically, by this  in dt_cpufreq_early_init()
235 		dev_err(cpu_dev, "OPP table can't be empty\n");  in dt_cpufreq_early_init()
236 		ret = -ENODEV;  in dt_cpufreq_early_init()
241 		cpumask_setall(priv->cpus);  in dt_cpufreq_early_init()
242 		ret = dev_pm_opp_set_sharing_cpus(cpu_dev, priv->cpus);  in dt_cpufreq_early_init()
248 	ret = dev_pm_opp_init_cpufreq_table(cpu_dev, &priv->freq_table);  in dt_cpufreq_early_init()
254 	list_add(&priv->node, &priv_list);  in dt_cpufreq_early_init()
258 	if (priv->have_static_opps)  in dt_cpufreq_early_init()
259 		dev_pm_opp_of_cpumask_remove_table(priv->cpus);  in dt_cpufreq_early_init()
260 	dev_pm_opp_put_regulators(priv->opp_token);  in dt_cpufreq_early_init()
262 	free_cpumask_var(priv->cpus);  in dt_cpufreq_early_init()
271 		dev_pm_opp_free_cpufreq_table(priv->cpu_dev, &priv->freq_table);  in dt_cpufreq_release()
272 		if (priv->have_static_opps)  in dt_cpufreq_release()
273 			dev_pm_opp_of_cpumask_remove_table(priv->cpus);  in dt_cpufreq_release()
274 		dev_pm_opp_put_regulators(priv->opp_token);  in dt_cpufreq_release()
275 		free_cpumask_var(priv->cpus);  in dt_cpufreq_release()
276 		list_del(&priv->node);  in dt_cpufreq_release()
282 	struct cpufreq_dt_platform_data *data = dev_get_platdata(&pdev->dev);  in dt_cpufreq_probe()
285 	/* Request resources early so we can return in case of -EPROBE_DEFER */  in dt_cpufreq_probe()
287 		ret = dt_cpufreq_early_init(&pdev->dev, cpu);  in dt_cpufreq_probe()
293 		if (data->have_governor_per_policy)  in dt_cpufreq_probe()
296 		dt_cpufreq_driver.resume = data->resume;  in dt_cpufreq_probe()
297 		if (data->suspend)  in dt_cpufreq_probe()
298 			dt_cpufreq_driver.suspend = data->suspend;  in dt_cpufreq_probe()
299 		if (data->get_intermediate) {  in dt_cpufreq_probe()
300 			dt_cpufreq_driver.target_intermediate = data->target_intermediate;  in dt_cpufreq_probe()
301 			dt_cpufreq_driver.get_intermediate = data->get_intermediate;  in dt_cpufreq_probe()
307 		dev_err(&pdev->dev, "failed register driver: %d\n", ret);  in dt_cpufreq_probe()
325 		.name	= "cpufreq-dt",
336 	cpufreq_dt_devinfo.name = "cpufreq-dt";  in cpufreq_dt_pdev_register()
343 MODULE_ALIAS("platform:cpufreq-dt");