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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001// SPDX-License-Identifier: GPL-2.0
Sascha Hauer613330a2012-03-03 12:40:02 +01002#include <linux/slab.h>
Guennadi Liakhovetskidfad84a2012-06-19 17:43:56 +02003#include <linux/string.h>
Sascha Hauer613330a2012-03-03 12:40:02 +01004#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);
Guennadi Liakhovetskidfad84a2012-06-19 17:43:56 +020018 kfree(data->cfg.supply_name);
Sascha Hauer613330a2012-03-03 12:40:02 +010019 kfree(data);
20}
21
22/**
Guennadi Liakhovetskidfad84a2012-06-19 17:43:56 +020023 * regulator_register_fixed_name - register a no-op fixed regulator
Sascha Hauer613330a2012-03-03 12:40:02 +010024 * @id: platform device id
Guennadi Liakhovetskidfad84a2012-06-19 17:43:56 +020025 * @name: name to be used for the regulator
Sascha Hauer613330a2012-03-03 12:40:02 +010026 * @supplies: consumers for this regulator
27 * @num_supplies: number of consumers
Guennadi Liakhovetski15719cc2012-06-19 17:44:39 +020028 * @uv: voltage in microvolts
Sascha Hauer613330a2012-03-03 12:40:02 +010029 */
Guennadi Liakhovetskidfad84a2012-06-19 17:43:56 +020030struct platform_device *regulator_register_always_on(int id, const char *name,
Guennadi Liakhovetski15719cc2012-06-19 17:44:39 +020031 struct regulator_consumer_supply *supplies, int num_supplies, int uv)
Sascha Hauer613330a2012-03-03 12:40:02 +010032{
33 struct fixed_regulator_data *data;
34
35 data = kzalloc(sizeof(*data), GFP_KERNEL);
36 if (!data)
37 return NULL;
38
Guennadi Liakhovetskidfad84a2012-06-19 17:43:56 +020039 data->cfg.supply_name = kstrdup(name, GFP_KERNEL);
40 if (!data->cfg.supply_name) {
41 kfree(data);
42 return NULL;
43 }
44
Guennadi Liakhovetski15719cc2012-06-19 17:44:39 +020045 data->cfg.microvolts = uv;
Sascha Hauer613330a2012-03-03 12:40:02 +010046 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}