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