drivers/regulator/fixed-helper.c

   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 }