1 #include <linux/slab.h>
2 #include <linux/string.h>
3 #include <linux/platform_device.h>
4 #include <linux/regulator/machine.h>
5 #include <linux/regulator/fixed.h>
6
7 struct fixed_regulator_data {
8 struct fixed_voltage_config cfg;
9 struct regulator_init_data init_data;
10 struct platform_device pdev;
11 };
12
regulator_fixed_release(struct device * dev)13 static void regulator_fixed_release(struct device *dev)
14 {
15 struct fixed_regulator_data *data = container_of(dev,
16 struct fixed_regulator_data, pdev.dev);
17 kfree(data->cfg.supply_name);
18 kfree(data);
19 }
20
21 /**
22 * regulator_register_fixed_name - register a no-op fixed regulator
23 * @id: platform device id
24 * @name: name to be used for the regulator
25 * @supplies: consumers for this regulator
26 * @num_supplies: number of consumers
27 * @uv: voltage in microvolts
28 */
regulator_register_always_on(int id,const char * name,struct regulator_consumer_supply * supplies,int num_supplies,int uv)29 struct platform_device *regulator_register_always_on(int id, const char *name,
30 struct regulator_consumer_supply *supplies, int num_supplies, int uv)
31 {
32 struct fixed_regulator_data *data;
33
34 data = kzalloc(sizeof(*data), GFP_KERNEL);
35 if (!data)
36 return NULL;
37
38 data->cfg.supply_name = kstrdup(name, GFP_KERNEL);
39 if (!data->cfg.supply_name) {
40 kfree(data);
41 return NULL;
42 }
43
44 data->cfg.microvolts = uv;
45 data->cfg.gpio = -EINVAL;
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