1 // SPDX-License-Identifier: GPL-2.0
7  * In Certain QCOM SoCs like apq8096 and msm8996 that have KRYO processors,
8  * the CPU frequency subset and voltage value of each OPP varies
10  * defines the voltage and frequency value based on the msm-id in SMEM
12  * The qcom-cpufreq-nvmem driver reads the msm-id and efuse value from the SoC
15  * operating-points-v2 table when it is parsed by the OPP framework.
18 #include <linux/cpu.h>
23 #include <linux/nvmem-consumer.h>
117 		/* 4 bits of PVS are in efuse register bits 31, 8-6. */  in get_krait_bin_format_b()
153 	/* The first 4 bytes are format, next to them is the actual msm-id */  in qcom_cpufreq_get_msm_id()
185 		return -ENODEV;  in qcom_cpufreq_kryo_name_version()
194 		drv->versions = 1 << (unsigned int)(*speedbin);  in qcom_cpufreq_kryo_name_version()
197 		drv->versions = 1 << ((unsigned int)(*speedbin) + 4);  in qcom_cpufreq_kryo_name_version()
234 		ret = -ENODEV;  in qcom_cpufreq_krait_name_version()
238 	snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d",  in qcom_cpufreq_krait_name_version()
241 	drv->versions = (1 << speed);  in qcom_cpufreq_krait_name_version()
268 	char pvs_name_buffer[] = "speedXX-pvsXX-vXX";  in qcom_cpufreq_probe()
270 	unsigned cpu;  in qcom_cpufreq_probe()  local
276 		return -ENODEV;  in qcom_cpufreq_probe()
280 		return -ENOENT;  in qcom_cpufreq_probe()
282 	ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu");  in qcom_cpufreq_probe()
285 		return -ENOENT;  in qcom_cpufreq_probe()
290 		return -ENOMEM;  in qcom_cpufreq_probe()
292 	match = pdev->dev.platform_data;  in qcom_cpufreq_probe()
293 	drv->data = match->data;  in qcom_cpufreq_probe()
294 	if (!drv->data) {  in qcom_cpufreq_probe()
295 		ret = -ENODEV;  in qcom_cpufreq_probe()
299 	if (drv->data->get_version) {  in qcom_cpufreq_probe()
307 		ret = drv->data->get_version(cpu_dev,  in qcom_cpufreq_probe()
317 	drv->opp_tokens = kcalloc(num_possible_cpus(), sizeof(*drv->opp_tokens),  in qcom_cpufreq_probe()
319 	if (!drv->opp_tokens) {  in qcom_cpufreq_probe()
320 		ret = -ENOMEM;  in qcom_cpufreq_probe()
324 	for_each_possible_cpu(cpu) {  in qcom_cpufreq_probe()
329 		cpu_dev = get_cpu_device(cpu);  in qcom_cpufreq_probe()
331 			ret = -ENODEV;  in qcom_cpufreq_probe()
335 		if (drv->data->get_version) {  in qcom_cpufreq_probe()
336 			config.supported_hw = &drv->versions;  in qcom_cpufreq_probe()
343 		if (drv->data->genpd_names) {  in qcom_cpufreq_probe()
344 			config.genpd_names = drv->data->genpd_names;  in qcom_cpufreq_probe()
349 			drv->opp_tokens[cpu] = dev_pm_opp_set_config(cpu_dev, &config);  in qcom_cpufreq_probe()
350 			if (drv->opp_tokens[cpu] < 0) {  in qcom_cpufreq_probe()
351 				ret = drv->opp_tokens[cpu];  in qcom_cpufreq_probe()
358 	cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,  in qcom_cpufreq_probe()
369 	for_each_possible_cpu(cpu)  in qcom_cpufreq_probe()
370 		dev_pm_opp_clear_config(drv->opp_tokens[cpu]);  in qcom_cpufreq_probe()
371 	kfree(drv->opp_tokens);  in qcom_cpufreq_probe()
381 	unsigned int cpu;  in qcom_cpufreq_remove()  local
385 	for_each_possible_cpu(cpu)  in qcom_cpufreq_remove()
386 		dev_pm_opp_clear_config(drv->opp_tokens[cpu]);  in qcom_cpufreq_remove()
388 	kfree(drv->opp_tokens);  in qcom_cpufreq_remove()
398 		.name = "qcom-cpufreq-nvmem",
427 		return -ENODEV;  in qcom_cpufreq_init()
432 		return -ENODEV;  in qcom_cpufreq_init()
438 	cpufreq_pdev = platform_device_register_data(NULL, "qcom-cpufreq-nvmem",  in qcom_cpufreq_init()
439 						     -1, match, sizeof(*match));  in qcom_cpufreq_init()
457 MODULE_LICENSE("GPL v2");