1 files changed, 74 insertions, 0 deletions
diff --git a/drivers/regulator/renesas-usb-vbus-regulator.c b/drivers/regulator/renesas-usb-vbus-regulator.c
new file mode 100644
index 000000000000..4eceb6b54497
--- /dev/null
+++ b/drivers/regulator/renesas-usb-vbus-regulator.c
@@ -0,0 +1,74 @@
+// 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");