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1// SPDX-License-Identifier: GPL-2.02//3// Renesas USB VBUS output regulator driver4//5// Copyright (C) 2024 Renesas Electronics Corporation6//7 8#include <linux/module.h>9#include <linux/err.h>10#include <linux/kernel.h>11#include <linux/of.h>12#include <linux/platform_device.h>13#include <linux/regmap.h>14#include <linux/regulator/driver.h>15#include <linux/regulator/of_regulator.h>16 17static const struct regulator_ops rzg2l_usb_vbus_reg_ops = {18 .enable = regulator_enable_regmap,19 .disable = regulator_disable_regmap,20 .is_enabled = regulator_is_enabled_regmap,21};22 23static const struct regulator_desc rzg2l_usb_vbus_rdesc = {24 .name = "vbus",25 .of_match = of_match_ptr("regulator-vbus"),26 .ops = &rzg2l_usb_vbus_reg_ops,27 .type = REGULATOR_VOLTAGE,28 .owner = THIS_MODULE,29 .enable_reg = 0,30 .enable_mask = BIT(0),31 .enable_is_inverted = true,32 .fixed_uV = 5000000,33 .n_voltages = 1,34};35 36static int rzg2l_usb_vbus_regulator_probe(struct platform_device *pdev)37{38 struct regulator_config config = { };39 struct device *dev = &pdev->dev;40 struct regulator_dev *rdev;41 42 config.regmap = dev_get_regmap(dev->parent, NULL);43 if (!config.regmap)44 return dev_err_probe(dev, -ENOENT, "Failed to get regmap\n");45 46 config.dev = dev;47 config.of_node = of_get_child_by_name(dev->parent->of_node, "regulator-vbus");48 if (!config.of_node)49 return dev_err_probe(dev, -ENODEV, "regulator node not found\n");50 51 rdev = devm_regulator_register(dev, &rzg2l_usb_vbus_rdesc, &config);52 if (IS_ERR(rdev)) {53 of_node_put(config.of_node);54 return dev_err_probe(dev, PTR_ERR(rdev),55 "not able to register vbus regulator\n");56 }57 58 of_node_put(config.of_node);59 60 return 0;61}62 63static struct platform_driver rzg2l_usb_vbus_regulator_driver = {64 .probe = rzg2l_usb_vbus_regulator_probe,65 .driver = {66 .name = "rzg2l-usb-vbus-regulator",67 .probe_type = PROBE_PREFER_ASYNCHRONOUS,68 },69};70module_platform_driver(rzg2l_usb_vbus_regulator_driver);71 72MODULE_AUTHOR("Biju Das <biju.das.jz@bp.renesas.com>");73MODULE_DESCRIPTION("Renesas RZ/G2L USB Vbus Regulator Driver");74MODULE_LICENSE("GPL");75