tree 7463a941e8fe1a5f11a4d966119f2db3b0243526
parent afae6c2bf10ff0d43748eca378fd263fe2e9f89b
author Shantur Rathore <i@shantur.com> 1702145456 +0000
committer Tom Rini <trini@konsulko.com> 1705945743 -0500

common: usb-hub: Reset hub port before scanning

Currently when a hub is turned on, all the ports are powered on.
This works well for hubs which have individual power control.

For the hubs without individual power control this has no effect.
Mostly in these scenarios the hub port is powered before the USB
controller is enabled, this can lead to some devices in unexpected
state.

With this patch, we explicitly reset the port while powering up hub
This resets the port for hubs without port power control and has
no effect on hubs with port power control as the port is still off.

Before this patch AMicro AM8180 based NVME to USB adapter won't be
detected as a USB3.0 Mass Storage device but with this it works as
expected.

Tested working after this patch:
1. AMicro AM8180 based NVME to USB Adapter
2. Kingston DataTraveler 3.0
3. GenesysLogic USB3.0 Hub

The drives were tested while connected directly and via the hub.

Signed-off-by: Shantur Rathore <i@shantur.com>
Reviewed-by: Marek Vasut <marex@denx.de>