xref: /linux/drivers/regulator/fixed-helper.c (revision 2dbf708448c836754d25fe6108c5bfe1f5697c95)
1 #include <linux/slab.h>
2 #include <linux/platform_device.h>
3 #include <linux/regulator/machine.h>
4 #include <linux/regulator/fixed.h>
5 
6 struct fixed_regulator_data {
7 	struct fixed_voltage_config cfg;
8 	struct regulator_init_data init_data;
9 	struct platform_device pdev;
10 };
11 
12 static void regulator_fixed_release(struct device *dev)
13 {
14 	struct fixed_regulator_data *data = container_of(dev,
15 			struct fixed_regulator_data, pdev.dev);
16 	kfree(data);
17 }
18 
19 /**
20  * regulator_register_fixed - register a no-op fixed regulator
21  * @id: platform device id
22  * @supplies: consumers for this regulator
23  * @num_supplies: number of consumers
24  */
25 struct platform_device *regulator_register_fixed(int id,
26 		struct regulator_consumer_supply *supplies, int num_supplies)
27 {
28 	struct fixed_regulator_data *data;
29 
30 	data = kzalloc(sizeof(*data), GFP_KERNEL);
31 	if (!data)
32 		return NULL;
33 
34 	data->cfg.supply_name = "fixed-dummy";
35 	data->cfg.microvolts = 0;
36 	data->cfg.gpio = -EINVAL;
37 	data->cfg.enabled_at_boot = 1;
38 	data->cfg.init_data = &data->init_data;
39 
40 	data->init_data.constraints.always_on = 1;
41 	data->init_data.consumer_supplies = supplies;
42 	data->init_data.num_consumer_supplies = num_supplies;
43 
44 	data->pdev.name = "reg-fixed-voltage";
45 	data->pdev.id = id;
46 	data->pdev.dev.platform_data = &data->cfg;
47 	data->pdev.dev.release = regulator_fixed_release;
48 
49 	platform_device_register(&data->pdev);
50 
51 	return &data->pdev;
52 }
53