This patch removes 2 mdelay(200) calls from usb_hub_port_connect_change(). These delays don't seem to be necessary. At least not in my tests. Here the number for a custom x86 Bay Trail board (not in mainline yet) with a quite large and complex USB hub infrastructure.
Without this patch: starting USB... USB0: USB EHCI 1.00 scanning bus 0 for devices... 9 USB Device(s) found time: 28.415 seconds With this patch: starting USB... USB0: USB EHCI 1.00 scanning bus 0 for devices... 9 USB Device(s) found time: 24.811 seconds So ~3.5 seconds of USB scanning time reduction. Signed-off-by: Stefan Roese <[email protected]> Cc: Simon Glass <[email protected]> Cc: Hans de Goede <[email protected]> Cc: Stephen Warren <[email protected]> Cc: Marek Vasut <[email protected]> --- Changes in v2: - Make this change unconditional - Add Acked-by / Tested-by from Hans and Stephen common/usb_hub.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/common/usb_hub.c b/common/usb_hub.c index 10fdd3c..721cfd8 100644 --- a/common/usb_hub.c +++ b/common/usb_hub.c @@ -275,7 +275,6 @@ int usb_hub_port_connect_change(struct usb_device *dev, int port) if (!(portstatus & USB_PORT_STAT_CONNECTION)) return -ENOTCONN; } - mdelay(200); /* Reset the port */ ret = legacy_hub_port_reset(dev, port, &portstatus); @@ -285,8 +284,6 @@ int usb_hub_port_connect_change(struct usb_device *dev, int port) return ret; } - mdelay(200); - switch (portstatus & USB_PORT_STAT_SPEED_MASK) { case USB_PORT_STAT_SUPER_SPEED: speed = USB_SPEED_SUPER; -- 2.7.3 _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
