1 // SPDX-License-Identifier: GPL-2.0-only
33 #define MAINTAINER	"linux-pm@vger.kernel.org"
88 		.driver_data = (((mhz)/100) << 8) | ((mv - 700) / 16)		\
98 /* Ultra Low Voltage Intel Pentium M processor 900MHz (Banias) */
107 /* Ultra Low Voltage Intel Pentium M processor 1000MHz (Banias) */
117 /* Low Voltage Intel Pentium M processor 1.10GHz (Banias) */
129 /* Low Voltage Intel Pentium M processor 1.20GHz (Banias) */
236 	struct cpuinfo_x86 *cpu = &cpu_data(policy->cpu);  in centrino_cpu_init_table()
239 	for(model = models; model->cpu_id != NULL; model++)  in centrino_cpu_init_table()
240 		if (centrino_verify_cpu_id(cpu, model->cpu_id) &&  in centrino_cpu_init_table()
241 		    (model->model_name == NULL ||  in centrino_cpu_init_table()
242 		     strcmp(cpu->x86_model_id, model->model_name) == 0))  in centrino_cpu_init_table()
245 	if (model->cpu_id == NULL) {  in centrino_cpu_init_table()
249 		       cpu->x86_model_id);  in centrino_cpu_init_table()
250 		return -ENOENT;  in centrino_cpu_init_table()
253 	if (model->op_points == NULL) {  in centrino_cpu_init_table()
254 		/* Matched a non-match */  in centrino_cpu_init_table()
256 		       cpu->x86_model_id);  in centrino_cpu_init_table()
257 		pr_debug("try using the acpi-cpufreq driver\n");  in centrino_cpu_init_table()
258 		return -ENOENT;  in centrino_cpu_init_table()
261 	per_cpu(centrino_model, policy->cpu) = model;  in centrino_cpu_init_table()
264 	       model->model_name, model->max_freq);  in centrino_cpu_init_table()
272 	return -ENODEV;  in centrino_cpu_init_table()
279 	if ((c->x86 == x->x86) &&  in centrino_verify_cpu_id()
280 	    (c->x86_model == x->x86_model) &&  in centrino_verify_cpu_id()
281 	    (c->x86_stepping == x->x86_stepping))  in centrino_verify_cpu_id()
304 	    (!per_cpu(centrino_model, cpu)->op_points))  in extract_clock()
309 		per_cpu(centrino_model, cpu)->op_points[i].frequency  in extract_clock()
312 		if (msr == per_cpu(centrino_model, cpu)->op_points[i].driver_data)  in extract_clock()
313 			return per_cpu(centrino_model, cpu)->  in extract_clock()
317 		return per_cpu(centrino_model, cpu)->op_points[i-1].frequency;  in extract_clock()
335 		 * P-state transition (like TM2). Get the last freq set   in get_cur_freq()
347 	struct cpuinfo_x86 *cpu = &cpu_data(policy->cpu);  in centrino_cpu_init()
351 	/* Only Intel makes Enhanced Speedstep-capable CPUs */  in centrino_cpu_init()
352 	if (cpu->x86_vendor != X86_VENDOR_INTEL ||  in centrino_cpu_init()
354 		return -ENODEV;  in centrino_cpu_init()
359 	if (policy->cpu != 0)  in centrino_cpu_init()
360 		return -ENODEV;  in centrino_cpu_init()
367 		per_cpu(centrino_cpu, policy->cpu) = &cpu_ids[i];  in centrino_cpu_init()
369 	if (!per_cpu(centrino_cpu, policy->cpu)) {  in centrino_cpu_init()
373 		return -ENODEV;  in centrino_cpu_init()
377 		return -ENODEV;  in centrino_cpu_init()
392 			return -ENODEV;  in centrino_cpu_init()
396 	policy->cpuinfo.transition_latency = 10000;  in centrino_cpu_init()
398 	policy->freq_table = per_cpu(centrino_model, policy->cpu)->op_points;  in centrino_cpu_init()
405 	unsigned int cpu = policy->cpu;  in centrino_cpu_exit()
408 		return -ENODEV;  in centrino_cpu_exit()
416  * centrino_target - set a new CPUFreq policy
424 	unsigned int	msr, oldmsr = 0, h = 0, cpu = policy->cpu;  in centrino_target()
431 		return -ENOMEM;  in centrino_target()
434 		retval = -ENODEV;  in centrino_target()
439 	op_points = &per_cpu(centrino_model, cpu)->op_points[index];  in centrino_target()
440 	for_each_cpu(j, policy->cpus) {  in centrino_target()
447 		if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)  in centrino_target()
448 			good_cpu = cpumask_any_and(policy->cpus,  in centrino_target()
455 			retval = -EAGAIN;  in centrino_target()
463 		msr = op_points->driver_data;  in centrino_target()
468 				pr_debug("no change needed - msr was and needs "  in centrino_target()
482 		if (policy->shared_type == CPUFREQ_SHARED_TYPE_ANY)  in centrino_target()
491 		 * We have sent callbacks to policy->cpus and  in centrino_target()
507 	.name		= "centrino", /* should be speedstep-centrino,
531  * centrino_init - initializes the Enhanced SpeedStep CPUFreq driver
533  * Initializes the Enhanced SpeedStep support. Returns -ENODEV on
534  * unsupported devices, -ENOENT if there's no voltage table for this
535  * particular CPU model, -EINVAL on problems during initiatization,
547 		return -ENODEV;  in centrino_init()