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>
77 		efuse = opp_data->soc_data->efuse_fallback;  in amx3_efuse_xlate()
180 	.efuse_offset = OMAP34xx_ProdID_SKUID - OMAP3_SYSCON_BASE,
183 	.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
207 	.efuse_offset = OMAP3_CONTROL_DEVICE_STATUS - OMAP3_SYSCON_BASE,
210 	.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
221 	.efuse_offset = OMAP3_CONTROL_DEVICE_STATUS - OMAP3_SYSCON_BASE,
224 	.rev_offset = OMAP3_CONTROL_IDCODE - OMAP3_SYSCON_BASE,
238  * ti_cpufreq_get_efuse() - Parse and return efuse value present on SoC
247 	struct device *dev = opp_data->cpu_dev;  in ti_cpufreq_get_efuse()
251 	ret = regmap_read(opp_data->syscon, opp_data->soc_data->efuse_offset,  in ti_cpufreq_get_efuse()
253 	if (ret == -EIO) {  in ti_cpufreq_get_efuse()
256 				opp_data->soc_data->efuse_offset, 4);  in ti_cpufreq_get_efuse()
259 			return -ENOMEM;  in ti_cpufreq_get_efuse()
270 	efuse = (efuse & opp_data->soc_data->efuse_mask);  in ti_cpufreq_get_efuse()
271 	efuse >>= opp_data->soc_data->efuse_shift;  in ti_cpufreq_get_efuse()
273 	*efuse_value = opp_data->soc_data->efuse_xlate(opp_data, efuse);  in ti_cpufreq_get_efuse()
279  * ti_cpufreq_get_rev() - Parse and return rev value present on SoC
288 	struct device *dev = opp_data->cpu_dev;  in ti_cpufreq_get_rev()
292 	ret = regmap_read(opp_data->syscon, opp_data->soc_data->rev_offset,  in ti_cpufreq_get_rev()
294 	if (ret == -EIO) {  in ti_cpufreq_get_rev()
297 				opp_data->soc_data->rev_offset, 4);  in ti_cpufreq_get_rev()
300 			return -ENOMEM;  in ti_cpufreq_get_rev()
318 	struct device *dev = opp_data->cpu_dev;  in ti_cpufreq_setup_syscon_register()
319 	struct device_node *np = opp_data->opp_node;  in ti_cpufreq_setup_syscon_register()
321 	opp_data->syscon = syscon_regmap_lookup_by_phandle(np,  in ti_cpufreq_setup_syscon_register()
323 	if (IS_ERR(opp_data->syscon)) {  in ti_cpufreq_setup_syscon_register()
326 		return PTR_ERR(opp_data->syscon);  in ti_cpufreq_setup_syscon_register()
372 	match = dev_get_platdata(&pdev->dev);  in ti_cpufreq_probe()
374 		return -ENODEV;  in ti_cpufreq_probe()
376 	opp_data = devm_kzalloc(&pdev->dev, sizeof(*opp_data), GFP_KERNEL);  in ti_cpufreq_probe()
378 		return -ENOMEM;  in ti_cpufreq_probe()
380 	opp_data->soc_data = match->data;  in ti_cpufreq_probe()
382 	opp_data->cpu_dev = get_cpu_device(0);  in ti_cpufreq_probe()
383 	if (!opp_data->cpu_dev) {  in ti_cpufreq_probe()
385 		return -ENODEV;  in ti_cpufreq_probe()
388 	opp_data->opp_node = dev_pm_opp_of_get_opp_desc_node(opp_data->cpu_dev);  in ti_cpufreq_probe()
389 	if (!opp_data->opp_node) {  in ti_cpufreq_probe()
390 		dev_info(opp_data->cpu_dev,  in ti_cpufreq_probe()
391 			 "OPP-v2 not supported, cpufreq-dt will attempt to use legacy tables.\n");  in ti_cpufreq_probe()
402 	 *	0 - SoC Revision  in ti_cpufreq_probe()
403 	 *	1 - eFuse value  in ti_cpufreq_probe()
413 	if (opp_data->soc_data->multi_regulator) {  in ti_cpufreq_probe()
414 		if (opp_data->soc_data->reg_names)  in ti_cpufreq_probe()
415 			config.regulator_names = opp_data->soc_data->reg_names;  in ti_cpufreq_probe()
420 	ret = dev_pm_opp_set_config(opp_data->cpu_dev, &config);  in ti_cpufreq_probe()
422 		dev_err(opp_data->cpu_dev, "Failed to set OPP config\n");  in ti_cpufreq_probe()
426 	of_node_put(opp_data->opp_node);  in ti_cpufreq_probe()
429 	platform_device_register_simple("cpufreq-dt", -1, NULL, 0);  in ti_cpufreq_probe()
434 	of_node_put(opp_data->opp_node);  in ti_cpufreq_probe()
446 		platform_device_register_data(NULL, "ti-cpufreq", -1, match,  in ti_cpufreq_init()
456 		.name = "ti-cpufreq",
461 MODULE_DESCRIPTION("TI CPUFreq/OPP hw-supported driver");
462 MODULE_AUTHOR("Dave Gerlach <d-gerlach@ti.com>");