1 #include <linux/slab.h> 2 #include <linux/string.h> 3 #include <linux/platform_device.h> 4 #include <linux/regulator/machine.h> 5 #include <linux/regulator/fixed.h> 6 7 struct fixed_regulator_data { 8 struct fixed_voltage_config cfg; 9 struct regulator_init_data init_data; 10 struct platform_device pdev; 11 }; 12 13 static void regulator_fixed_release(struct device *dev) 14 { 15 struct fixed_regulator_data *data = container_of(dev, 16 struct fixed_regulator_data, pdev.dev); 17 kfree(data->cfg.supply_name); 18 kfree(data); 19 } 20 21 /** 22 * regulator_register_fixed_name - register a no-op fixed regulator 23 * @id: platform device id 24 * @name: name to be used for the regulator 25 * @supplies: consumers for this regulator 26 * @num_supplies: number of consumers 27 * @uv: voltage in microvolts 28 */ 29 struct platform_device *regulator_register_always_on(int id, const char *name, 30 struct regulator_consumer_supply *supplies, int num_supplies, int uv) 31 { 32 struct fixed_regulator_data *data; 33 34 data = kzalloc(sizeof(*data), GFP_KERNEL); 35 if (!data) 36 return NULL; 37 38 data->cfg.supply_name = kstrdup(name, GFP_KERNEL); 39 if (!data->cfg.supply_name) { 40 kfree(data); 41 return NULL; 42 } 43 44 data->cfg.microvolts = uv; 45 data->cfg.gpio = -EINVAL; 46 data->cfg.enabled_at_boot = 1; 47 data->cfg.init_data = &data->init_data; 48 49 data->init_data.constraints.always_on = 1; 50 data->init_data.consumer_supplies = supplies; 51 data->init_data.num_consumer_supplies = num_supplies; 52 53 data->pdev.name = "reg-fixed-voltage"; 54 data->pdev.id = id; 55 data->pdev.dev.platform_data = &data->cfg; 56 data->pdev.dev.release = regulator_fixed_release; 57 58 platform_device_register(&data->pdev); 59 60 return &data->pdev; 61 } 62