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1// SPDX-License-Identifier: GPL-2.02#include <linux/slab.h>3#include <linux/string.h>4#include <linux/platform_device.h>5#include <linux/regulator/machine.h>6#include <linux/regulator/fixed.h>7 8struct fixed_regulator_data {9 struct fixed_voltage_config cfg;10 struct regulator_init_data init_data;11 struct platform_device pdev;12};13 14static void regulator_fixed_release(struct device *dev)15{16 struct fixed_regulator_data *data = container_of(dev,17 struct fixed_regulator_data, pdev.dev);18 kfree_const(data->cfg.supply_name);19 kfree(data);20}21 22/**23 * regulator_register_always_on - register an always-on regulator with a fixed name24 * @id: platform device id25 * @name: name to be used for the regulator26 * @supplies: consumers for this regulator27 * @num_supplies: number of consumers28 * @uv: voltage in microvolts29 *30 * Return: Pointer to registered platform device, or %NULL if memory allocation fails.31 */32struct platform_device *regulator_register_always_on(int id, const char *name,33 struct regulator_consumer_supply *supplies, int num_supplies, int uv)34{35 struct fixed_regulator_data *data;36 37 data = kzalloc(sizeof(*data), GFP_KERNEL);38 if (!data)39 return NULL;40 41 data->cfg.supply_name = kstrdup_const(name, GFP_KERNEL);42 if (!data->cfg.supply_name) {43 kfree(data);44 return NULL;45 }46 47 data->cfg.microvolts = uv;48 data->cfg.enabled_at_boot = 1;49 data->cfg.init_data = &data->init_data;50 51 data->init_data.constraints.always_on = 1;52 data->init_data.consumer_supplies = supplies;53 data->init_data.num_consumer_supplies = num_supplies;54 55 data->pdev.name = "reg-fixed-voltage";56 data->pdev.id = id;57 data->pdev.dev.platform_data = &data->cfg;58 data->pdev.dev.release = regulator_fixed_release;59 60 platform_device_register(&data->pdev);61 62 return &data->pdev;63}64