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// SPDX-License-Identifier: GPL-2.0
//
// Renesas USB VBUS output regulator driver
//
// Copyright (C) 2024 Renesas Electronics Corporation
//
#include <linux/module.h>
#include <linux/err.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
static const struct regulator_ops rzg2l_usb_vbus_reg_ops = {
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
};
static const struct regulator_desc rzg2l_usb_vbus_rdesc = {
.name = "vbus",
.of_match = of_match_ptr("regulator-vbus"),
.ops = &rzg2l_usb_vbus_reg_ops,
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.enable_reg = 0,
.enable_mask = BIT(0),
.enable_is_inverted = true,
.fixed_uV = 5000000,
.n_voltages = 1,
};
static int rzg2l_usb_vbus_regulator_probe(struct platform_device *pdev)
{
struct regulator_config config = { };
struct device *dev = &pdev->dev;
struct regulator_dev *rdev;
config.regmap = dev_get_regmap(dev->parent, NULL);
if (!config.regmap)
return dev_err_probe(dev, -ENOENT, "Failed to get regmap\n");
config.dev = dev;
config.of_node = of_get_child_by_name(dev->parent->of_node, "regulator-vbus");
if (!config.of_node)
return dev_err_probe(dev, -ENODEV, "regulator node not found\n");
rdev = devm_regulator_register(dev, &rzg2l_usb_vbus_rdesc, &config);
if (IS_ERR(rdev)) {
of_node_put(config.of_node);
return dev_err_probe(dev, PTR_ERR(rdev),
"not able to register vbus regulator\n");
}
of_node_put(config.of_node);
return 0;
}
static struct platform_driver rzg2l_usb_vbus_regulator_driver = {
.probe = rzg2l_usb_vbus_regulator_probe,
.driver = {
.name = "rzg2l-usb-vbus-regulator",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
},
};
module_platform_driver(rzg2l_usb_vbus_regulator_driver);
MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");
MODULE_DESCRIPTION("Renesas RZ/G2L USB Vbus Regulator Driver");
MODULE_LICENSE("GPL");
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