9  * Roger Quadros <ext-roger.quadros@nokia.com>
17  * non-controllable regulators, as well as for allowing testing on
27 #include <linux/gpio.h>
41  * of_get_fixed_voltage_config - extract fixed_voltage_config structure info
53 	struct fixed_voltage_config *config;  in of_get_fixed_voltage_config()  local
54 	struct device_node *np = dev->of_node;  in of_get_fixed_voltage_config()
57 	config = devm_kzalloc(dev, sizeof(struct fixed_voltage_config),  in of_get_fixed_voltage_config()
59 	if (!config)  in of_get_fixed_voltage_config()
60 		return ERR_PTR(-ENOMEM);  in of_get_fixed_voltage_config()
62 	config->init_data = of_get_regulator_init_data(dev, dev->of_node, desc);  in of_get_fixed_voltage_config()
63 	if (!config->init_data)  in of_get_fixed_voltage_config()
64 		return ERR_PTR(-EINVAL);  in of_get_fixed_voltage_config()
66 	init_data = config->init_data;  in of_get_fixed_voltage_config()
67 	init_data->constraints.apply_uV = 0;  in of_get_fixed_voltage_config()
69 	config->supply_name = init_data->constraints.name;  in of_get_fixed_voltage_config()
70 	if (init_data->constraints.min_uV == init_data->constraints.max_uV) {  in of_get_fixed_voltage_config()
71 		config->microvolts = init_data->constraints.min_uV;  in of_get_fixed_voltage_config()
75 		return ERR_PTR(-EINVAL);  in of_get_fixed_voltage_config()
78 	if (init_data->constraints.boot_on)  in of_get_fixed_voltage_config()
79 		config->enabled_at_boot = true;  in of_get_fixed_voltage_config()
81 	config->gpio = of_get_named_gpio(np, "gpio", 0);  in of_get_fixed_voltage_config()
82 	if ((config->gpio < 0) && (config->gpio != -ENOENT))  in of_get_fixed_voltage_config()
83 		return ERR_PTR(config->gpio);  in of_get_fixed_voltage_config()
85 	of_property_read_u32(np, "startup-delay-us", &config->startup_delay);  in of_get_fixed_voltage_config()
87 	config->enable_high = of_property_read_bool(np, "enable-active-high");  in of_get_fixed_voltage_config()
88 	config->gpio_is_open_drain = of_property_read_bool(np,  in of_get_fixed_voltage_config()
89 							   "gpio-open-drain");  in of_get_fixed_voltage_config()
91 	if (of_find_property(np, "vin-supply", NULL))  in of_get_fixed_voltage_config()
92 		config->input_supply = "vin";  in of_get_fixed_voltage_config()
94 	return config;  in of_get_fixed_voltage_config()
102 	struct fixed_voltage_config *config;  in reg_fixed_voltage_probe()  local
107 	drvdata = devm_kzalloc(&pdev->dev, sizeof(struct fixed_voltage_data),  in reg_fixed_voltage_probe()
110 		return -ENOMEM;  in reg_fixed_voltage_probe()
112 	if (pdev->dev.of_node) {  in reg_fixed_voltage_probe()
113 		config = of_get_fixed_voltage_config(&pdev->dev,  in reg_fixed_voltage_probe()
114 						     &drvdata->desc);  in reg_fixed_voltage_probe()
115 		if (IS_ERR(config))  in reg_fixed_voltage_probe()
116 			return PTR_ERR(config);  in reg_fixed_voltage_probe()
118 		config = dev_get_platdata(&pdev->dev);  in reg_fixed_voltage_probe()
121 	if (!config)  in reg_fixed_voltage_probe()
122 		return -ENOMEM;  in reg_fixed_voltage_probe()
124 	drvdata->desc.name = devm_kstrdup(&pdev->dev,  in reg_fixed_voltage_probe()
125 					  config->supply_name,  in reg_fixed_voltage_probe()
127 	if (drvdata->desc.name == NULL) {  in reg_fixed_voltage_probe()
128 		dev_err(&pdev->dev, "Failed to allocate supply name\n");  in reg_fixed_voltage_probe()
129 		return -ENOMEM;  in reg_fixed_voltage_probe()
131 	drvdata->desc.type = REGULATOR_VOLTAGE;  in reg_fixed_voltage_probe()
132 	drvdata->desc.owner = THIS_MODULE;  in reg_fixed_voltage_probe()
133 	drvdata->desc.ops = &fixed_voltage_ops;  in reg_fixed_voltage_probe()
135 	drvdata->desc.enable_time = config->startup_delay;  in reg_fixed_voltage_probe()
137 	if (config->input_supply) {  in reg_fixed_voltage_probe()
138 		drvdata->desc.supply_name = devm_kstrdup(&pdev->dev,  in reg_fixed_voltage_probe()
139 					    config->input_supply,  in reg_fixed_voltage_probe()
141 		if (!drvdata->desc.supply_name) {  in reg_fixed_voltage_probe()
142 			dev_err(&pdev->dev,  in reg_fixed_voltage_probe()
144 			return -ENOMEM;  in reg_fixed_voltage_probe()
148 	if (config->microvolts)  in reg_fixed_voltage_probe()
149 		drvdata->desc.n_voltages = 1;  in reg_fixed_voltage_probe()
151 	drvdata->desc.fixed_uV = config->microvolts;  in reg_fixed_voltage_probe()
153 	if (gpio_is_valid(config->gpio)) {  in reg_fixed_voltage_probe()
154 		cfg.ena_gpio = config->gpio;  in reg_fixed_voltage_probe()
155 		if (pdev->dev.of_node)  in reg_fixed_voltage_probe()
158 	cfg.ena_gpio_invert = !config->enable_high;  in reg_fixed_voltage_probe()
159 	if (config->enabled_at_boot) {  in reg_fixed_voltage_probe()
160 		if (config->enable_high)  in reg_fixed_voltage_probe()
165 		if (config->enable_high)  in reg_fixed_voltage_probe()
170 	if (config->gpio_is_open_drain)  in reg_fixed_voltage_probe()
173 	cfg.dev = &pdev->dev;  in reg_fixed_voltage_probe()
174 	cfg.init_data = config->init_data;  in reg_fixed_voltage_probe()
176 	cfg.of_node = pdev->dev.of_node;  in reg_fixed_voltage_probe()
178 	drvdata->dev = devm_regulator_register(&pdev->dev, &drvdata->desc,  in reg_fixed_voltage_probe()
180 	if (IS_ERR(drvdata->dev)) {  in reg_fixed_voltage_probe()
181 		ret = PTR_ERR(drvdata->dev);  in reg_fixed_voltage_probe()
182 		dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);  in reg_fixed_voltage_probe()
188 	dev_dbg(&pdev->dev, "%s supplying %duV\n", drvdata->desc.name,  in reg_fixed_voltage_probe()
189 		drvdata->desc.fixed_uV);  in reg_fixed_voltage_probe()
196 	{ .compatible = "regulator-fixed", },
205 		.name		= "reg-fixed-voltage",
225 MODULE_ALIAS("platform:reg-fixed-voltage");