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
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(data->cfg.supply_name);
19 kfree(data);
20}
21
22/**
23 * regulator_register_fixed_name - register a no-op fixed regulator
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 */
30struct platform_device *regulator_register_always_on(int id, const char *name,
31 struct regulator_consumer_supply *supplies, int num_supplies, int uv)
32{
33 struct fixed_regulator_data *data;
34
35 data = kzalloc(sizeof(*data), GFP_KERNEL);
36 if (!data)
37 return NULL;
38
39 data->cfg.supply_name = kstrdup(name, GFP_KERNEL);
40 if (!data->cfg.supply_name) {
41 kfree(data);
42 return NULL;
43 }
44
45 data->cfg.microvolts = uv;
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