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
regulator_fixed_release(struct device * dev)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(data->cfg.supply_name);
19 kfree(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 */
regulator_register_always_on(int id,const char * name,struct regulator_consumer_supply * supplies,int num_supplies,int uv)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(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