1 // SPDX-License-Identifier: GPL-2.0-only
3  * CPUFreq driver for the Loongson-3 processors.
5  * All revisions of Loongson-3 processor support cpu_has_scalefreq feature.
7  * Author: Huacai Chen <chenhuacai@loongson.cn>
8  * Copyright (C) 2024 Loongson Technology Corporation Limited
18 #include <asm/loongson.h>
37 #define CMD_INVAL			3 /* Invalid Parameter */
41  * CMD_GET_VERSION - Get interface version
49  * CMD_GET_FEATURE - Get feature state
56  * CMD_SET_FEATURE - Set feature state
79 #define FEATURE_DVFS_SINGLE_BOOST	BIT(3)
83  * CMD_GET_SENSOR_NUM - Get number of sensors
90  * CMD_GET_SENSOR_STATUS - Get sensor status
102  * CMD_GET_FAN_NUM - Get number of fans
109  * CMD_GET_FAN_INFO - Get fan status
116  * CMD_SET_FAN_INFO - Set fan status
127  * CMD_GET_FREQ_LEVEL_NUM - Get number of freq levels
134  * CMD_GET_FREQ_BOOST_LEVEL - Get the first boost level
141  * CMD_GET_FREQ_LEVEL_INFO - Get freq level info
148  * CMD_GET_FREQ_INFO - Get freq info
155  * CMD_SET_FREQ_INFO - Set freq info
188 		return -EPERM;  in do_service_request()
212 		return -EPERM;  in do_service_request()
233 	ret = do_service_request(cpu_data[policy->cpu].core,  in loongson3_cpufreq_target()
259 	data = devm_kzalloc(&pdev->dev, struct_size(data, table, freq_level + 1), GFP_KERNEL);  in configure_freq_table()
261 		return -ENOMEM;  in configure_freq_table()
263 	data->def_freq_level = boost_level - 1;  in configure_freq_table()
268 			devm_kfree(&pdev->dev, data);  in configure_freq_table()
272 		data->table[i].frequency = ret * KILO;  in configure_freq_table()
273 		data->table[i].flags = (i >= boost_level) ? CPUFREQ_BOOST_FREQ : 0;  in configure_freq_table()
276 	data->table[freq_level].flags = 0;  in configure_freq_table()
277 	data->table[freq_level].frequency = CPUFREQ_TABLE_END;  in configure_freq_table()
286 	int i, ret, cpu = policy->cpu;  in loongson3_cpufreq_cpu_init()
292 	policy->cpuinfo.transition_latency = 10000;  in loongson3_cpufreq_cpu_init()
293 	policy->freq_table = per_cpu(freq_data, cpu)->table;  in loongson3_cpufreq_cpu_init()
294 	policy->suspend_freq = policy->freq_table[per_cpu(freq_data, cpu)->def_freq_level].frequency;  in loongson3_cpufreq_cpu_init()
295 	cpumask_copy(policy->cpus, topology_sibling_cpumask(cpu));  in loongson3_cpufreq_cpu_init()
297 	for_each_cpu(i, policy->cpus) {  in loongson3_cpufreq_cpu_init()
316 	int cpu = policy->cpu;  in loongson3_cpufreq_cpu_exit()
318 	loongson3_cpufreq_target(policy, per_cpu(freq_data, cpu)->def_freq_level);  in loongson3_cpufreq_cpu_exit()
350 		devm_mutex_init(&pdev->dev, &cpufreq_mutex[i]);  in loongson3_cpufreq_probe()
354 		return -EPERM;  in loongson3_cpufreq_probe()
359 		return -EPERM;  in loongson3_cpufreq_probe()
367 	pr_info("cpufreq: Loongson-3 CPU frequency driver.\n");  in loongson3_cpufreq_probe()
393 MODULE_AUTHOR("Huacai Chen <chenhuacai@loongson.cn>");
394 MODULE_DESCRIPTION("CPUFreq driver for Loongson-3 processors");