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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* dummy.c
*
* Copyright 2010 Wolfson Microelectronics PLC.
*
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
*
* This is useful for systems with mixed controllable and
* non-controllable regulators, as well as for allowing testing on
* systems with no controllable regulators.
*/
#include <linux/err.h>
#include <linux/export.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include "dummy.h"
struct regulator_dev *dummy_regulator_rdev;
static const struct regulator_init_data dummy_initdata = {
.constraints = {
.always_on = 1,
},
};
static const struct regulator_ops dummy_ops;
static const struct regulator_desc dummy_desc = {
.name = "regulator-dummy",
.id = -1,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.ops = &dummy_ops,
};
static int dummy_regulator_probe(struct platform_device *pdev)
{
struct regulator_config config = { };
int ret;
config.dev = &pdev->dev;
config.init_data = &dummy_initdata;
dummy_regulator_rdev = devm_regulator_register(&pdev->dev, &dummy_desc,
&config);
if (IS_ERR(dummy_regulator_rdev)) {
ret = PTR_ERR(dummy_regulator_rdev);
pr_err("Failed to register regulator: %d\n", ret);
return ret;
}
return 0;
}
static struct platform_driver dummy_regulator_driver = {
.probe = dummy_regulator_probe,
.driver = {
.name = "reg-dummy",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
static struct platform_device *dummy_pdev;
void __init regulator_dummy_init(void)
{
int ret;
dummy_pdev = platform_device_alloc("reg-dummy", -1);
if (!dummy_pdev) {
pr_err("Failed to allocate dummy regulator device\n");
return;
}
ret = platform_device_add(dummy_pdev);
if (ret != 0) {
pr_err("Failed to register dummy regulator device: %d\n", ret);
platform_device_put(dummy_pdev);
return;
}
ret = platform_driver_register(&dummy_regulator_driver);
if (ret != 0) {
pr_err("Failed to register dummy regulator driver: %d\n", ret);
platform_device_unregister(dummy_pdev);
}
}
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