projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| ba1fa2ab FG |
1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* | |
| 3 | * Driver for onboard USB hubs | |
| 4 | * | |
| 5 | * Copyright (C) 2022, STMicroelectronics - All Rights Reserved | |
| 6 | * | |
| 7 | * Mostly inspired by Linux kernel v6.1 onboard_usb_hub driver | |
| 8 | */ | |
| 9 | ||
| 10 | #include <common.h> | |
| 11 | #include <dm.h> | |
| 12 | #include <dm/device_compat.h> | |
| 13 | #include <power/regulator.h> | |
| 14 | ||
| 15 | struct onboard_hub { | |
| 16 | struct udevice *vdd; | |
| 17 | }; | |
| 18 | ||
| 19 | static int usb_onboard_hub_probe(struct udevice *dev) | |
| 20 | { | |
| 21 | struct onboard_hub *hub = dev_get_priv(dev); | |
| 22 | int ret; | |
| 23 | ||
| 24 | ret = device_get_supply_regulator(dev, "vdd-supply", &hub->vdd); | |
| 25 | if (ret) { | |
| 26 | dev_err(dev, "can't get vdd-supply: %d\n", ret); | |
| 27 | return ret; | |
| 28 | } | |
| 29 | ||
| 30 | ret = regulator_set_enable_if_allowed(hub->vdd, true); | |
| 31 | if (ret) | |
| 32 | dev_err(dev, "can't enable vdd-supply: %d\n", ret); | |
| 33 | ||
| 34 | return ret; | |
| 35 | } | |
| 36 | ||
| 37 | static int usb_onboard_hub_remove(struct udevice *dev) | |
| 38 | { | |
| 39 | struct onboard_hub *hub = dev_get_priv(dev); | |
| 40 | int ret; | |
| 41 | ||
| 42 | ret = regulator_set_enable_if_allowed(hub->vdd, false); | |
| 43 | if (ret) | |
| 44 | dev_err(dev, "can't disable vdd-supply: %d\n", ret); | |
| 45 | ||
| 46 | return ret; | |
| 47 | } | |
| 48 | ||
| 49 | static const struct udevice_id usb_onboard_hub_ids[] = { | |
| 50 | /* Use generic usbVID,PID dt-bindings (usb-device.yaml) */ | |
| 51 | { .compatible = "usb424,2514" }, /* USB2514B USB 2.0 */ | |
| 52 | { } | |
| 53 | }; | |
| 54 | ||
| 55 | U_BOOT_DRIVER(usb_onboard_hub) = { | |
| 56 | .name = "usb_onboard_hub", | |
| 57 | .id = UCLASS_USB_HUB, | |
| 58 | .probe = usb_onboard_hub_probe, | |
| 59 | .remove = usb_onboard_hub_remove, | |
| 60 | .of_match = usb_onboard_hub_ids, | |
| 61 | .priv_auto = sizeof(struct onboard_hub), | |
| 62 | }; |