[U-Boot] [PATCH v5 11/15] usb: ohci: Remove unnecessary delays from hc_start and power power-on paths
Marek Vasut
marex at denx.de
Sun May 10 18:11:17 CEST 2015
On Sunday, May 10, 2015 at 02:10:23 PM, Hans de Goede wrote:
> The usb spec says that we must wait a minimum amount of time after port
> power on (exact time is in the hub descriptor), this is something which
> we must not only do for root ports but also for external hub ports, which
> is why the common usb_hub code already waits a full second after powering
> up ports. Having a separate wait for just the root hub in the ohci-hcd
> code only leads to doing the waiting twice for the root ports, so drop the
> wait from the ohci-hcd code.
>
> Signed-off-by: Hans de Goede <hdegoede at redhat.com>
Acked-by: Marek Vasut <marex at denx.de>
Best regards,
Marek Vasut
More information about the U-Boot
mailing list