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>
107 		/* 4 bits of PVS are in efuse register bits 31, 8-6. */  in get_krait_bin_format_b()
155 		drv->versions = 1 << (unsigned int)(*speedbin);  in qcom_cpufreq_kryo_name_version()
159 		drv->versions = 1 << ((unsigned int)(*speedbin) + 4);  in qcom_cpufreq_kryo_name_version()
195 		dev_err(cpu_dev, "Unable to read nvmem data. Defaulting to 0!\n");  in qcom_cpufreq_krait_name_version()
196 		ret = -ENODEV;  in qcom_cpufreq_krait_name_version()
200 	snprintf(*pvs_name, sizeof("speedXX-pvsXX-vXX"), "speed%d-pvs%d-v%d",  in qcom_cpufreq_krait_name_version()
203 	drv->versions = (1 << speed);  in qcom_cpufreq_krait_name_version()
230 	char pvs_name_buffer[] = "speedXX-pvsXX-vXX";  in qcom_cpufreq_probe()
238 		return -ENODEV;  in qcom_cpufreq_probe()
242 		return -ENOENT;  in qcom_cpufreq_probe()
244 	ret = of_device_is_compatible(np, "operating-points-v2-kryo-cpu");  in qcom_cpufreq_probe()
247 		return -ENOENT;  in qcom_cpufreq_probe()
250 	drv = devm_kzalloc(&pdev->dev, struct_size(drv, cpus, num_possible_cpus()),  in qcom_cpufreq_probe()
254 		return -ENOMEM;  in qcom_cpufreq_probe()
257 	match = pdev->dev.platform_data;  in qcom_cpufreq_probe()
258 	drv->data = match->data;  in qcom_cpufreq_probe()
259 	if (!drv->data) {  in qcom_cpufreq_probe()
261 		return -ENODEV;  in qcom_cpufreq_probe()
264 	if (drv->data->get_version) {  in qcom_cpufreq_probe()
269 					     "Could not get nvmem cell\n");  in qcom_cpufreq_probe()
272 		ret = drv->data->get_version(cpu_dev,  in qcom_cpufreq_probe()
290 			ret = -ENODEV;  in qcom_cpufreq_probe()
294 		if (drv->data->get_version) {  in qcom_cpufreq_probe()
295 			config.supported_hw = &drv->versions;  in qcom_cpufreq_probe()
302 		if (drv->data->genpd_names) {  in qcom_cpufreq_probe()
303 			config.genpd_names = drv->data->genpd_names;  in qcom_cpufreq_probe()
308 			drv->cpus[cpu].opp_token = dev_pm_opp_set_config(cpu_dev, &config);  in qcom_cpufreq_probe()
309 			if (drv->cpus[cpu].opp_token < 0) {  in qcom_cpufreq_probe()
310 				ret = drv->cpus[cpu].opp_token;  in qcom_cpufreq_probe()
317 	cpufreq_dt_pdev = platform_device_register_simple("cpufreq-dt", -1,  in qcom_cpufreq_probe()
329 		dev_pm_opp_clear_config(drv->cpus[cpu].opp_token);  in qcom_cpufreq_probe()
341 		dev_pm_opp_clear_config(drv->cpus[cpu].opp_token);  in qcom_cpufreq_remove()
348 		.name = "qcom-cpufreq-nvmem",
353 	{ .compatible = "qcom,apq8096", .data = &match_data_kryo },
354 	{ .compatible = "qcom,msm8996", .data = &match_data_kryo },
355 	{ .compatible = "qcom,qcs404", .data = &match_data_qcs404 },
356 	{ .compatible = "qcom,ipq8064", .data = &match_data_krait },
357 	{ .compatible = "qcom,apq8064", .data = &match_data_krait },
358 	{ .compatible = "qcom,msm8974", .data = &match_data_krait },
359 	{ .compatible = "qcom,msm8960", .data = &match_data_krait },
365  * Since the driver depends on smem and nvmem drivers, which may
377 		return -ENODEV;  in qcom_cpufreq_init()
382 		return -ENODEV;  in qcom_cpufreq_init()
388 	cpufreq_pdev = platform_device_register_data(NULL, "qcom-cpufreq-nvmem",  in qcom_cpufreq_init()
389 						     -1, match, sizeof(*match));  in qcom_cpufreq_init()
406 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. CPUfreq driver");