1 // SPDX-License-Identifier: GPL-2.0-or-later
10  * Roger Quadros <ext-roger.quadros@nokia.com>
13  * non-controllable regulators, as well as for allowing testing on
25 #include <linux/gpio/consumer.h>
53 	ret = clk_prepare_enable(priv->enable_clock);  in reg_clock_enable()
57 	priv->enable_counter++;  in reg_clock_enable()
66 	clk_disable_unprepare(priv->enable_clock);  in reg_clock_disable()
67 	priv->enable_counter--;  in reg_clock_disable()
75 	struct device *dev = rdev->dev.parent;  in reg_domain_enable()
78 	ret = dev_pm_genpd_set_performance_state(dev, priv->performance_state);  in reg_domain_enable()
82 	priv->enable_counter++;  in reg_domain_enable()
90 	struct device *dev = rdev->dev.parent;  in reg_domain_disable()
97 	priv->enable_counter--;  in reg_domain_disable()
106 	return priv->enable_counter > 0;  in reg_is_enabled()
111  * of_get_fixed_voltage_config - extract fixed_voltage_config structure info
124 	struct device_node *np = dev->of_node;  in of_get_fixed_voltage_config()
130 		return ERR_PTR(-ENOMEM);  in of_get_fixed_voltage_config()
132 	config->init_data = of_get_regulator_init_data(dev, dev->of_node, desc);  in of_get_fixed_voltage_config()
133 	if (!config->init_data)  in of_get_fixed_voltage_config()
134 		return ERR_PTR(-EINVAL);  in of_get_fixed_voltage_config()
136 	init_data = config->init_data;  in of_get_fixed_voltage_config()
137 	init_data->constraints.apply_uV = 0;  in of_get_fixed_voltage_config()
139 	config->supply_name = init_data->constraints.name;  in of_get_fixed_voltage_config()
140 	if (init_data->constraints.min_uV == init_data->constraints.max_uV) {  in of_get_fixed_voltage_config()
141 		config->microvolts = init_data->constraints.min_uV;  in of_get_fixed_voltage_config()
145 		return ERR_PTR(-EINVAL);  in of_get_fixed_voltage_config()
148 	if (init_data->constraints.boot_on)  in of_get_fixed_voltage_config()
149 		config->enabled_at_boot = true;  in of_get_fixed_voltage_config()
151 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);  in of_get_fixed_voltage_config()
152 	of_property_read_u32(np, "off-on-delay-us", &config->off_on_delay);  in of_get_fixed_voltage_config()
154 	if (of_find_property(np, "vin-supply", NULL))  in of_get_fixed_voltage_config()
155 		config->input_supply = "vin";  in of_get_fixed_voltage_config()
177 	struct device *dev = &pdev->dev;  in reg_fixed_voltage_probe()
181 	struct regulator_config cfg = { };  in reg_fixed_voltage_probe()  local
185 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),  in reg_fixed_voltage_probe()
188 		return -ENOMEM;  in reg_fixed_voltage_probe()
190 	if (pdev->dev.of_node) {  in reg_fixed_voltage_probe()
191 		config = of_get_fixed_voltage_config(&pdev->dev,  in reg_fixed_voltage_probe()
192 						     &drvdata->desc);  in reg_fixed_voltage_probe()
196 		config = dev_get_platdata(&pdev->dev);  in reg_fixed_voltage_probe()
200 		return -ENOMEM;  in reg_fixed_voltage_probe()
202 	drvdata->desc.name = devm_kstrdup(&pdev->dev,  in reg_fixed_voltage_probe()
203 					  config->supply_name,  in reg_fixed_voltage_probe()
205 	if (drvdata->desc.name == NULL) {  in reg_fixed_voltage_probe()
206 		dev_err(&pdev->dev, "Failed to allocate supply name\n");  in reg_fixed_voltage_probe()
207 		return -ENOMEM;  in reg_fixed_voltage_probe()
209 	drvdata->desc.type = REGULATOR_VOLTAGE;  in reg_fixed_voltage_probe()
210 	drvdata->desc.owner = THIS_MODULE;  in reg_fixed_voltage_probe()
212 	if (drvtype && drvtype->has_enable_clock) {  in reg_fixed_voltage_probe()
213 		drvdata->desc.ops = &fixed_voltage_clkenabled_ops;  in reg_fixed_voltage_probe()
215 		drvdata->enable_clock = devm_clk_get(dev, NULL);  in reg_fixed_voltage_probe()
216 		if (IS_ERR(drvdata->enable_clock)) {  in reg_fixed_voltage_probe()
217 			dev_err(dev, "Can't get enable-clock from devicetree\n");  in reg_fixed_voltage_probe()
218 			return -ENOENT;  in reg_fixed_voltage_probe()
220 	} else if (drvtype && drvtype->has_performance_state) {  in reg_fixed_voltage_probe()
221 		drvdata->desc.ops = &fixed_voltage_domain_ops;  in reg_fixed_voltage_probe()
223 		drvdata->performance_state = of_get_required_opp_performance_state(dev->of_node, 0);  in reg_fixed_voltage_probe()
224 		if (drvdata->performance_state < 0) {  in reg_fixed_voltage_probe()
226 			return drvdata->performance_state;  in reg_fixed_voltage_probe()
229 		drvdata->desc.ops = &fixed_voltage_ops;  in reg_fixed_voltage_probe()
232 	drvdata->desc.enable_time = config->startup_delay;  in reg_fixed_voltage_probe()
233 	drvdata->desc.off_on_delay = config->off_on_delay;  in reg_fixed_voltage_probe()
235 	if (config->input_supply) {  in reg_fixed_voltage_probe()
236 		drvdata->desc.supply_name = devm_kstrdup(&pdev->dev,  in reg_fixed_voltage_probe()
237 					    config->input_supply,  in reg_fixed_voltage_probe()
239 		if (!drvdata->desc.supply_name)  in reg_fixed_voltage_probe()
240 			return -ENOMEM;  in reg_fixed_voltage_probe()
243 	if (config->microvolts)  in reg_fixed_voltage_probe()
244 		drvdata->desc.n_voltages = 1;  in reg_fixed_voltage_probe()
246 	drvdata->desc.fixed_uV = config->microvolts;  in reg_fixed_voltage_probe()
249 	 * The signal will be inverted by the GPIO core if flagged so in the  in reg_fixed_voltage_probe()
252 	if (config->enabled_at_boot)  in reg_fixed_voltage_probe()
261 	 * the GPIO descriptor, but only the first call will initialize  in reg_fixed_voltage_probe()
272 	 * lifecycle management of the GPIO descriptor.  in reg_fixed_voltage_probe()
274 	cfg.ena_gpiod = gpiod_get_optional(&pdev->dev, NULL, gflags);  in reg_fixed_voltage_probe()
275 	if (IS_ERR(cfg.ena_gpiod))  in reg_fixed_voltage_probe()
276 		return dev_err_probe(&pdev->dev, PTR_ERR(cfg.ena_gpiod),  in reg_fixed_voltage_probe()
277 				     "can't get GPIO\n");  in reg_fixed_voltage_probe()
279 	cfg.dev = &pdev->dev;  in reg_fixed_voltage_probe()
280 	cfg.init_data = config->init_data;  in reg_fixed_voltage_probe()
281 	cfg.driver_data = drvdata;  in reg_fixed_voltage_probe()
282 	cfg.of_node = pdev->dev.of_node;  in reg_fixed_voltage_probe()
284 	drvdata->dev = devm_regulator_register(&pdev->dev, &drvdata->desc,  in reg_fixed_voltage_probe()
285 					       &cfg);  in reg_fixed_voltage_probe()
286 	if (IS_ERR(drvdata->dev)) {  in reg_fixed_voltage_probe()
287 		ret = dev_err_probe(&pdev->dev, PTR_ERR(drvdata->dev),  in reg_fixed_voltage_probe()
289 				    PTR_ERR(drvdata->dev));  in reg_fixed_voltage_probe()
295 	dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name,  in reg_fixed_voltage_probe()
296 		drvdata->desc.fixed_uV);  in reg_fixed_voltage_probe()
316 		.compatible = "regulator-fixed",
320 		.compatible = "regulator-fixed-clock",
324 		.compatible = "regulator-fixed-domain",
336 		.name		= "reg-fixed-voltage",
356 MODULE_ALIAS("platform:reg-fixed-voltage");