1 // SPDX-License-Identifier: GPL-2.0-only
3  * TI CPUFreq/OPP hw-supported driver
5  * Copyright (C) 2016-2017 Texas Instruments, Inc.
6  *	 Dave Gerlach <d-gerlach@ti.com>
69 		efuse = opp_data->soc_data->efuse_fallback;  in amx3_efuse_xlate()
153 	.efuse_offset = OMAP34xx_ProdID_SKUID - OMAP3_SYSCON_BASE,
156 	.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
180 	.efuse_offset = OMAP3_CONTROL_DEVICE_STATUS - OMAP3_SYSCON_BASE,
183 	.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
194 	.efuse_offset = OMAP3_CONTROL_DEVICE_STATUS - OMAP3_SYSCON_BASE,
197 	.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
203  * ti_cpufreq_get_efuse() - Parse and return efuse value present on SoC
212 	struct device *dev = opp_data->cpu_dev;  in ti_cpufreq_get_efuse()
216 	ret = regmap_read(opp_data->syscon, opp_data->soc_data->efuse_offset,  in ti_cpufreq_get_efuse()
218 	if (ret == -EIO) {  in ti_cpufreq_get_efuse()
221 				opp_data->soc_data->efuse_offset, 4);  in ti_cpufreq_get_efuse()
224 			return -ENOMEM;  in ti_cpufreq_get_efuse()
235 	efuse = (efuse & opp_data->soc_data->efuse_mask);  in ti_cpufreq_get_efuse()
236 	efuse >>= opp_data->soc_data->efuse_shift;  in ti_cpufreq_get_efuse()
238 	*efuse_value = opp_data->soc_data->efuse_xlate(opp_data, efuse);  in ti_cpufreq_get_efuse()
244  * ti_cpufreq_get_rev() - Parse and return rev value present on SoC
253 	struct device *dev = opp_data->cpu_dev;  in ti_cpufreq_get_rev()
257 	ret = regmap_read(opp_data->syscon, opp_data->soc_data->rev_offset,  in ti_cpufreq_get_rev()
259 	if (ret == -EIO) {  in ti_cpufreq_get_rev()
262 				opp_data->soc_data->rev_offset, 4);  in ti_cpufreq_get_rev()
265 			return -ENOMEM;  in ti_cpufreq_get_rev()
283 	struct device *dev = opp_data->cpu_dev;  in ti_cpufreq_setup_syscon_register()
284 	struct device_node *np = opp_data->opp_node;  in ti_cpufreq_setup_syscon_register()
286 	opp_data->syscon = syscon_regmap_lookup_by_phandle(np,  in ti_cpufreq_setup_syscon_register()
288 	if (IS_ERR(opp_data->syscon)) {  in ti_cpufreq_setup_syscon_register()
291 		return PTR_ERR(opp_data->syscon);  in ti_cpufreq_setup_syscon_register()
334 	match = dev_get_platdata(&pdev->dev);  in ti_cpufreq_probe()
336 		return -ENODEV;  in ti_cpufreq_probe()
338 	opp_data = devm_kzalloc(&pdev->dev, sizeof(*opp_data), GFP_KERNEL);  in ti_cpufreq_probe()
340 		return -ENOMEM;  in ti_cpufreq_probe()
342 	opp_data->soc_data = match->data;  in ti_cpufreq_probe()
344 	opp_data->cpu_dev = get_cpu_device(0);  in ti_cpufreq_probe()
345 	if (!opp_data->cpu_dev) {  in ti_cpufreq_probe()
347 		return -ENODEV;  in ti_cpufreq_probe()
350 	opp_data->opp_node = dev_pm_opp_of_get_opp_desc_node(opp_data->cpu_dev);  in ti_cpufreq_probe()
351 	if (!opp_data->opp_node) {  in ti_cpufreq_probe()
352 		dev_info(opp_data->cpu_dev,  in ti_cpufreq_probe()
353 			 "OPP-v2 not supported, cpufreq-dt will attempt to use legacy tables.\n");  in ti_cpufreq_probe()
364 	 *	0 - SoC Revision  in ti_cpufreq_probe()
365 	 *	1 - eFuse value  in ti_cpufreq_probe()
375 	if (opp_data->soc_data->multi_regulator) {  in ti_cpufreq_probe()
376 		if (opp_data->soc_data->reg_names)  in ti_cpufreq_probe()
377 			config.regulator_names = opp_data->soc_data->reg_names;  in ti_cpufreq_probe()
382 	ret = dev_pm_opp_set_config(opp_data->cpu_dev, &config);  in ti_cpufreq_probe()
384 		dev_err(opp_data->cpu_dev, "Failed to set OPP config\n");  in ti_cpufreq_probe()
388 	of_node_put(opp_data->opp_node);  in ti_cpufreq_probe()
391 	platform_device_register_simple("cpufreq-dt", -1, NULL, 0);  in ti_cpufreq_probe()
396 	of_node_put(opp_data->opp_node);  in ti_cpufreq_probe()
408 		platform_device_register_data(NULL, "ti-cpufreq", -1, match,  in ti_cpufreq_init()
418 		.name = "ti-cpufreq",
423 MODULE_DESCRIPTION("TI CPUFreq/OPP hw-supported driver");
424 MODULE_AUTHOR("Dave Gerlach <d-gerlach@ti.com>");