mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-18 17:54:13 +08:00
613330a0f7
Some devices require a regulator to work, but boards may not have a software controllable regulator for this device. Provide a helper function to make it simpler for these boards to register a fixed regulator as a dummy regulator. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
#include <linux/slab.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regulator/machine.h>
|
|
#include <linux/regulator/fixed.h>
|
|
|
|
struct fixed_regulator_data {
|
|
struct fixed_voltage_config cfg;
|
|
struct regulator_init_data init_data;
|
|
struct platform_device pdev;
|
|
};
|
|
|
|
static void regulator_fixed_release(struct device *dev)
|
|
{
|
|
struct fixed_regulator_data *data = container_of(dev,
|
|
struct fixed_regulator_data, pdev.dev);
|
|
kfree(data);
|
|
}
|
|
|
|
/**
|
|
* regulator_register_fixed - register a no-op fixed regulator
|
|
* @name: supply name
|
|
* @id: platform device id
|
|
* @supplies: consumers for this regulator
|
|
* @num_supplies: number of consumers
|
|
*/
|
|
struct platform_device *regulator_register_fixed(int id,
|
|
struct regulator_consumer_supply *supplies, int num_supplies)
|
|
{
|
|
struct fixed_regulator_data *data;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return NULL;
|
|
|
|
data->cfg.supply_name = "dummy";
|
|
data->cfg.microvolts = 0;
|
|
data->cfg.gpio = -EINVAL;
|
|
data->cfg.enabled_at_boot = 1;
|
|
data->cfg.init_data = &data->init_data;
|
|
|
|
data->init_data.constraints.always_on = 1;
|
|
data->init_data.consumer_supplies = supplies;
|
|
data->init_data.num_consumer_supplies = num_supplies;
|
|
|
|
data->pdev.name = "reg-fixed-voltage";
|
|
data->pdev.id = id;
|
|
data->pdev.dev.platform_data = &data->cfg;
|
|
data->pdev.dev.release = regulator_fixed_release;
|
|
|
|
platform_device_register(&data->pdev);
|
|
|
|
return &data->pdev;
|
|
}
|