1 // SPDX-License-Identifier: GPL-2.0
7  * In Certain QCOM SoCs like apq8096 and msm8996 that have KRYO processors,
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.
23 #include <linux/nvmem-consumer.h>
29 #include <linux/soc/qcom/smem.h>
31 #include <dt-bindings/arm/qcom,ids.h>
103 		/* 4 bits of PVS are in efuse register bits 31, 8-6. */  in get_krait_bin_format_b()
151 		drv->versions = 1 << (unsigned int)(*speedbin);  in qcom_cpufreq_kryo_name_version()
155 		drv->versions = 1 << ((unsigned int)(*speedbin) + 4);  in qcom_cpufreq_kryo_name_version()
191 		dev_err(cpu_dev, "Unable to read nvmem data. Defaulting to 0!\n");  in qcom_cpufreq_krait_name_version()
192 		ret = -ENODEV;  in qcom_cpufreq_krait_name_version()
196 	snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d",  in qcom_cpufreq_krait_name_version()
199 	drv->versions = (1 << speed);  in qcom_cpufreq_krait_name_version()
226 	char pvs_name_buffer[] = "speedXX-pvsXX-vXX";  in qcom_cpufreq_probe()
234 		return -ENODEV;  in qcom_cpufreq_probe()
238 		return -ENOENT;  in qcom_cpufreq_probe()
240 	ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu");  in qcom_cpufreq_probe()
243 		return -ENOENT;  in qcom_cpufreq_probe()
248 		return -ENOMEM;  in qcom_cpufreq_probe()
250 	match = pdev->dev.platform_data;  in qcom_cpufreq_probe()
251 	drv->data = match->data;  in qcom_cpufreq_probe()
252 	if (!drv->data) {  in qcom_cpufreq_probe()
253 		ret = -ENODEV;  in qcom_cpufreq_probe()
257 	if (drv->data->get_version) {  in qcom_cpufreq_probe()
261 					    "Could not get nvmem cell\n");  in qcom_cpufreq_probe()
265 		ret = drv->data->get_version(cpu_dev,  in qcom_cpufreq_probe()
275 	drv->opp_tokens = kcalloc(num_possible_cpus(), sizeof(*drv->opp_tokens),  in qcom_cpufreq_probe()
277 	if (!drv->opp_tokens) {  in qcom_cpufreq_probe()
278 		ret = -ENOMEM;  in qcom_cpufreq_probe()
289 			ret = -ENODEV;  in qcom_cpufreq_probe()
293 		if (drv->data->get_version) {  in qcom_cpufreq_probe()
294 			config.supported_hw = &drv->versions;  in qcom_cpufreq_probe()
301 		if (drv->data->genpd_names) {  in qcom_cpufreq_probe()
302 			config.genpd_names = drv->data->genpd_names;  in qcom_cpufreq_probe()
307 			drv->opp_tokens[cpu] = dev_pm_opp_set_config(cpu_dev, &config);  in qcom_cpufreq_probe()
308 			if (drv->opp_tokens[cpu] < 0) {  in qcom_cpufreq_probe()
309 				ret = drv->opp_tokens[cpu];  in qcom_cpufreq_probe()
316 	cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,  in qcom_cpufreq_probe()
328 		dev_pm_opp_clear_config(drv->opp_tokens[cpu]);  in qcom_cpufreq_probe()
329 	kfree(drv->opp_tokens);  in qcom_cpufreq_probe()
344 		dev_pm_opp_clear_config(drv->opp_tokens[cpu]);  in qcom_cpufreq_remove()
346 	kfree(drv->opp_tokens);  in qcom_cpufreq_remove()
354 		.name = "qcom-cpufreq-nvmem",
359 	{ .compatible = "qcom,apq8096", .data = &match_data_kryo },
360 	{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
361 	{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
362 	{ .compatible = "qcom,ipq8064", .data = &match_data_krait },
363 	{ .compatible = "qcom,apq8064", .data = &match_data_krait },
364 	{ .compatible = "qcom,msm8974", .data = &match_data_krait },
365 	{ .compatible = "qcom,msm8960", .data = &match_data_krait },
371  * Since the driver depends on smem and nvmem drivers, which may
383 		return -ENODEV;  in qcom_cpufreq_init()
388 		return -ENODEV;  in qcom_cpufreq_init()
394 	cpufreq_pdev = platform_device_register_data(NULL, "qcom-cpufreq-nvmem",  in qcom_cpufreq_init()
395 						     -1, match, sizeof(*match));  in qcom_cpufreq_init()
412 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. CPUfreq driver");