| 1 | // SPDX-License-Identifier: GPL-2.0 |
|---|---|
| 2 | #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 | |
| 8 | struct fixed_regulator_data { |
| 9 | struct fixed_voltage_config cfg; |
| 10 | struct regulator_init_data init_data; |
| 11 | struct platform_device pdev; |
| 12 | }; |
| 13 | |
| 14 | static 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(x: data->cfg.supply_name); |
| 19 | kfree(objp: data); |
| 20 | } |
| 21 | |
| 22 | /** |
| 23 | * regulator_register_always_on - register an always-on regulator with a fixed name |
| 24 | * @id: platform device id |
| 25 | * @name: name to be used for the regulator |
| 26 | * @supplies: consumers for this regulator |
| 27 | * @num_supplies: number of consumers |
| 28 | * @uv: voltage in microvolts |
| 29 | * |
| 30 | * Return: Pointer to registered platform device, or %NULL if memory allocation fails. |
| 31 | */ |
| 32 | struct 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(s: name, GFP_KERNEL); |
| 42 | if (!data->cfg.supply_name) { |
| 43 | kfree(objp: 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 |