From b5999f8f6ca89223b70ec3038fcfe9dbb6c67475 Mon Sep 17 00:00:00 2001 From: Hector Martin Date: Sun, 29 Oct 2023 16:09:09 +0900 Subject: [PATCH] usb: hub: Add missing reset recovery delay Some devices like YubiKeys need more time before SET_ADDRESS. The spec says we need to wait 10ms. Signed-off-by: Hector Martin Reviewed-by: Marek Vasut --- common/usb_hub.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/common/usb_hub.c b/common/usb_hub.c index 85c0822d8b..70279f301d 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -395,6 +395,13 @@ int usb_hub_port_connect_change(struct usb_device *dev, int port) break; } + /* + * USB 2.0 7.1.7.5: devices must be able to accept a SetAddress() + * request (refer to Section 11.24.2 and Section 9.4 respectively) + * after the reset recovery time 10 ms + */ + mdelay(10); + #if CONFIG_IS_ENABLED(DM_USB) struct udevice *child; -- 2.39.5