projects / mirror_ubuntu-hirsute-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 4fe66d5a WC |
1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | // | |
| 3 | // Qualcomm PMIC VBUS output regulator driver | |
| 4 | // | |
| 5 | // Copyright (c) 2020, The Linux Foundation. All rights reserved. | |
| 6 | ||
| 7 | #include <linux/module.h> | |
| 8 | #include <linux/err.h> | |
| 9 | #include <linux/kernel.h> | |
| 10 | #include <linux/of.h> | |
| 11 | #include <linux/of_device.h> | |
| 12 | #include <linux/platform_device.h> | |
| 13 | #include <linux/regulator/driver.h> | |
| 14 | #include <linux/regulator/of_regulator.h> | |
| 15 | #include <linux/regmap.h> | |
| 16 | ||
| 17 | #define CMD_OTG 0x40 | |
| 18 | #define OTG_EN BIT(0) | |
| 19 | #define OTG_CFG 0x53 | |
| 20 | #define OTG_EN_SRC_CFG BIT(1) | |
| 21 | ||
| 22 | static const struct regulator_ops qcom_usb_vbus_reg_ops = { | |
| 23 | .enable = regulator_enable_regmap, | |
| 24 | .disable = regulator_disable_regmap, | |
| 25 | .is_enabled = regulator_is_enabled_regmap, | |
| 26 | }; | |
| 27 | ||
| 28 | static struct regulator_desc qcom_usb_vbus_rdesc = { | |
| 29 | .name = "usb_vbus", | |
| 30 | .ops = &qcom_usb_vbus_reg_ops, | |
| 31 | .owner = THIS_MODULE, | |
| 32 | .type = REGULATOR_VOLTAGE, | |
| 33 | }; | |
| 34 | ||
| 35 | static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev) | |
| 36 | { | |
| 37 | struct device *dev = &pdev->dev; | |
| 38 | struct regulator_dev *rdev; | |
| 39 | struct regmap *regmap; | |
| 40 | struct regulator_config config = { }; | |
| 41 | struct regulator_init_data *init_data; | |
| 42 | int ret; | |
| 43 | u32 base; | |
| 44 | ||
| 45 | ret = of_property_read_u32(dev->of_node, "reg", &base); | |
| 46 | if (ret < 0) { | |
| 47 | dev_err(dev, "no base address found\n"); | |
| 48 | return ret; | |
| 49 | } | |
| 50 | ||
| 51 | regmap = dev_get_regmap(dev->parent, NULL); | |
| 94462138 | 52 | if (!regmap) { |
| 4fe66d5a WC |
53 | dev_err(dev, "Failed to get regmap\n"); |
| 54 | return -ENOENT; | |
| 55 | } | |
| 56 | ||
| 57 | init_data = of_get_regulator_init_data(dev, dev->of_node, | |
| 58 | &qcom_usb_vbus_rdesc); | |
| 59 | if (!init_data) | |
| 60 | return -ENOMEM; | |
| 61 | ||
| 62 | qcom_usb_vbus_rdesc.enable_reg = base + CMD_OTG; | |
| 63 | qcom_usb_vbus_rdesc.enable_mask = OTG_EN; | |
| 64 | config.dev = dev; | |
| 65 | config.init_data = init_data; | |
| 66 | config.regmap = regmap; | |
| 67 | ||
| 68 | rdev = devm_regulator_register(dev, &qcom_usb_vbus_rdesc, &config); | |
| 69 | if (IS_ERR(rdev)) { | |
| 70 | ret = PTR_ERR(rdev); | |
| 71 | dev_err(dev, "not able to register vbus reg %d\n", ret); | |
| 72 | return ret; | |
| 73 | } | |
| 74 | ||
| 75 | /* Disable HW logic for VBUS enable */ | |
| 76 | regmap_update_bits(regmap, base + OTG_CFG, OTG_EN_SRC_CFG, 0); | |
| 77 | ||
| 78 | return 0; | |
| 79 | } | |
| 80 | ||
| 81 | static const struct of_device_id qcom_usb_vbus_regulator_match[] = { | |
| 82 | { .compatible = "qcom,pm8150b-vbus-reg" }, | |
| 83 | { } | |
| 84 | }; | |
| 85 | MODULE_DEVICE_TABLE(of, qcom_usb_vbus_regulator_match); | |
| 86 | ||
| 87 | static struct platform_driver qcom_usb_vbus_regulator_driver = { | |
| 88 | .driver = { | |
| 89 | .name = "qcom-usb-vbus-regulator", | |
| 90 | .of_match_table = qcom_usb_vbus_regulator_match, | |
| 91 | }, | |
| 92 | .probe = qcom_usb_vbus_regulator_probe, | |
| 93 | }; | |
| 94 | module_platform_driver(qcom_usb_vbus_regulator_driver); | |
| 95 | ||
| 96 | MODULE_DESCRIPTION("Qualcomm USB vbus regulator driver"); | |
| 97 | MODULE_LICENSE("GPL v2"); |