I've been trying to use the Cubieboard2 USB OTG/DRC port (the mini USB one) in U-Boot and it seems that VBUS is always enabled on it (by measuring the voltage on the pin of the mini USB connector that is close to the ethernet connector, it always reads 5V).
The schematics mention a TCS9708 USB switch for OTG that I cannot seem to find on the actual board (I see only 2 TCS9708, one for each USB host port). Hence, I'm worried that the schematics don't actually match the board and that the OTG VBUS is always at 5V. The TCS9708 should be controlled by the PB9 GPIO, but toggling it doesn't change anything. The VBUS detection GPIO (PH5) always shows 1. Is this behaviour reproducible on every such board? If so, should we somewhat bypass the VBUS detection code in U-Boot so that the OTG port becomes usable in host mode too? -- Paul Kocialkowski, Replicant developer Replicant is a fully free Android distribution running on several devices, a free software mobile operating system putting the emphasis on freedom and privacy/security. Website: http://www.replicant.us/ Blog: http://blog.replicant.us/ Wiki/tracker/forums: http://redmine.replicant.us/ -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
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