Hi,
On Tue, Apr 2, 2013 at 3:39 PM, Marek Vasut <ma...@denx.de> wrote: > 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 ? Not of course, will amend this accordingly. -- Thanks & Regards Vivek _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot