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 15struct onboard_hub { 16 struct udevice *vdd; 17}; 18 19static 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 37static 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 49static 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 55U_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}; 63