On 05/19/2014 02:21 PM, Stephen Warren wrote: > From: Stephen Warren <swar...@nvidia.com> > > usb_hub_power_on() currently waits for the maximum of (a) the hub port's > power output to become good, (b) the max time the USB specification > allows a device to take to connect. > > However, these two operations must occur in series rather than in > parallel. First, the power supply ramps up to the level required to > power the USB device, and then the device may take a certain amount of > time to connect (assert D+/D- pullups). > > Related, the maximum time that a device has to assert pullups is 1s not > 100ms. > > This is explained in "Connect Timing ECN.pdf", itself part of > usb_20_042814.zip from www.usb.org.
Marek, does this series look OK? _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
