| Fabrice Gasnier | cd809b1 | 2022-12-12 11:44:35 +0100 | [diff] [blame] | 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 | |
| Fabrice Gasnier | cd809b1 | 2022-12-12 11:44:35 +0100 | [diff] [blame] | 10 | #include <dm.h> |
| 11 | #include <dm/device_compat.h> |
| 12 | #include <power/regulator.h> |
| 13 | |
| 14 | struct onboard_hub { |
| 15 | struct udevice *vdd; |
| 16 | }; |
| 17 | |
| 18 | static int usb_onboard_hub_probe(struct udevice *dev) |
| 19 | { |
| 20 | struct onboard_hub *hub = dev_get_priv(dev); |
| 21 | int ret; |
| 22 | |
| 23 | ret = device_get_supply_regulator(dev, "vdd-supply", &hub->vdd); |
| 24 | if (ret) { |
| 25 | dev_err(dev, "can't get vdd-supply: %d\n", ret); |
| 26 | return ret; |
| 27 | } |
| 28 | |
| 29 | ret = regulator_set_enable_if_allowed(hub->vdd, true); |
| 30 | if (ret) |
| 31 | dev_err(dev, "can't enable vdd-supply: %d\n", ret); |
| 32 | |
| 33 | return ret; |
| 34 | } |
| 35 | |
| 36 | static int usb_onboard_hub_remove(struct udevice *dev) |
| 37 | { |
| 38 | struct onboard_hub *hub = dev_get_priv(dev); |
| 39 | int ret; |
| 40 | |
| 41 | ret = regulator_set_enable_if_allowed(hub->vdd, false); |
| 42 | if (ret) |
| 43 | dev_err(dev, "can't disable vdd-supply: %d\n", ret); |
| 44 | |
| 45 | return ret; |
| 46 | } |
| 47 | |
| 48 | static const struct udevice_id usb_onboard_hub_ids[] = { |
| 49 | /* Use generic usbVID,PID dt-bindings (usb-device.yaml) */ |
| 50 | { .compatible = "usb424,2514" }, /* USB2514B USB 2.0 */ |
| 51 | { } |
| 52 | }; |
| 53 | |
| 54 | U_BOOT_DRIVER(usb_onboard_hub) = { |
| 55 | .name = "usb_onboard_hub", |
| 56 | .id = UCLASS_USB_HUB, |
| 57 | .probe = usb_onboard_hub_probe, |
| 58 | .remove = usb_onboard_hub_remove, |
| 59 | .of_match = usb_onboard_hub_ids, |
| 60 | .priv_auto = sizeof(struct onboard_hub), |
| 61 | }; |