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// SPDX-License-Identifier: GPL-2.0-only
/*
* Driver for onboard USB hubs
*
* Copyright (C) 2022, STMicroelectronics - All Rights Reserved
*
* Mostly inspired by Linux kernel v6.1 onboard_usb_hub driver
*/
#include <dm.h>
#include <dm/device_compat.h>
#include <power/regulator.h>
struct onboard_hub {
struct udevice *vdd;
};
static int usb_onboard_hub_probe(struct udevice *dev)
{
struct onboard_hub *hub = dev_get_priv(dev);
int ret;
ret = device_get_supply_regulator(dev, "vdd-supply", &hub->vdd);
if (ret) {
dev_err(dev, "can't get vdd-supply: %d\n", ret);
return ret;
}
ret = regulator_set_enable_if_allowed(hub->vdd, true);
if (ret)
dev_err(dev, "can't enable vdd-supply: %d\n", ret);
return ret;
}
static int usb_onboard_hub_remove(struct udevice *dev)
{
struct onboard_hub *hub = dev_get_priv(dev);
int ret;
ret = regulator_set_enable_if_allowed(hub->vdd, false);
if (ret)
dev_err(dev, "can't disable vdd-supply: %d\n", ret);
return ret;
}
static const struct udevice_id usb_onboard_hub_ids[] = {
/* Use generic usbVID,PID dt-bindings (usb-device.yaml) */
{ .compatible = "usb424,2514" }, /* USB2514B USB 2.0 */
{ }
};
U_BOOT_DRIVER(usb_onboard_hub) = {
.name = "usb_onboard_hub",
.id = UCLASS_USB_HUB,
.probe = usb_onboard_hub_probe,
.remove = usb_onboard_hub_remove,
.of_match = usb_onboard_hub_ids,
.priv_auto = sizeof(struct onboard_hub),
};
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