Dear Vivek Gautam, > Hi Marek, > > Adding CC: Amarendra > > On Thu, Mar 28, 2013 at 7:58 PM, Marek Vasut <ma...@denx.de> wrote: > > Dear Vivek Gautam, > > > >> Power on root hubs' ports only when they are not yet powered on. > >> Its seen with USB 3.0 ports that they are powered on after > >> a H/W reset, as also reflected in XHCI spec (sec 4.3): > >> "After a Chip Hardware Reset, HCRST, or commanded to the > >> PLS = RxDetect state, all Root Hub ports shall be in Disconnected > >> state, i.e. the port is powered on (PP = 1)" > >> > >> Signed-off-by: Amar <amarendra...@samsung.com> > >> Signed-off-by: Vivek Gautam <gautam.vi...@samsung.com> > > > > Just wondering if we shouldn't power-cycle all the ports instead -- aka. > > turn them off and then turn all of them on again. > > Hmm, seems like a fine idea. > Will it be fine to power-cycle even EHCI ports too ? > Or we just check if ports are already powered-up (as in XHCI) we > power-cycle them.
EHCI as well, all of them without differentiating the type. Why not , do you see a problem ? Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
