// SPDX-License-Identifier: GPL-2.0-only // // Qualcomm PMIC VBUS output regulator driver // // Copyright (c) 2020, The Linux Foundation. All rights reserved. #include <linux/module.h> #include <linux/err.h> #include <linux/kernel.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/of_regulator.h> #include <linux/regmap.h> #define CMD_OTG 0x40 #define OTG_EN BIT(0) #define OTG_CFG 0x53 #define OTG_EN_SRC_CFG BIT(1) static const struct regulator_ops qcom_usb_vbus_reg_ops = { .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .is_enabled = regulator_is_enabled_regmap, }; static struct regulator_desc qcom_usb_vbus_rdesc = { .name = "usb_vbus", .ops = &qcom_usb_vbus_reg_ops, .owner = THIS_MODULE, .type = REGULATOR_VOLTAGE, }; static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct regulator_dev *rdev; struct regmap *regmap; struct regulator_config config = { }; struct regulator_init_data *init_data; int ret; u32 base; ret = of_property_read_u32(dev->of_node, "reg", &base); if (ret < 0) { dev_err(dev, "no base address found\n"); return ret; } regmap = dev_get_regmap(dev->parent, NULL); if (!regmap) { dev_err(dev, "Failed to get regmap\n"); return -ENOENT; } init_data = of_get_regulator_init_data(dev, dev->of_node, &qcom_usb_vbus_rdesc); if (!init_data) return -ENOMEM; qcom_usb_vbus_rdesc.enable_reg = base + CMD_OTG; qcom_usb_vbus_rdesc.enable_mask = OTG_EN; config.dev = dev; config.init_data = init_data; config.of_node = dev->of_node; config.regmap = regmap; rdev = devm_regulator_register(dev, &qcom_usb_vbus_rdesc, &config); if (IS_ERR(rdev)) { ret = PTR_ERR(rdev); dev_err(dev, "not able to register vbus reg %d\n", ret); return ret; } /* Disable HW logic for VBUS enable */ regmap_update_bits(regmap, base + OTG_CFG, OTG_EN_SRC_CFG, 0); return 0; } static const struct of_device_id qcom_usb_vbus_regulator_match[] = { { .compatible = "qcom,pm8150b-vbus-reg" }, { } }; MODULE_DEVICE_TABLE(of, qcom_usb_vbus_regulator_match); static struct platform_driver qcom_usb_vbus_regulator_driver = { .driver = { .name = "qcom-usb-vbus-regulator", .of_match_table = qcom_usb_vbus_regulator_match, }, .probe = qcom_usb_vbus_regulator_probe, }; module_platform_driver(qcom_usb_vbus_regulator_driver); MODULE_DESCRIPTION("Qualcomm USB vbus regulator driver"); MODULE_LICENSE("GPL v2");