[U-Boot] [PATCH 2/4 v3] musb: Add Phy programming for usingexternal Vbus

Orjan Friberg
2011-07-05T11:52:03Z

On 2011-07-05 13:15, Gupta, Ajay Kumar wrote:
> OMAP3EVM doesn't use TPS PHY but it has ISP1507 PHY and uses external Vbus
> And so it needs extvbus programming (musb_cfg.extvbus =1)in OTG_CTRL
> register. As for as I know it is not needed for boards using usb PHY on TPS
> device.

Can you clarify what you mean by "not needed for boards using usb PHY on
TPS device"? How does that differ from the ISP1507? From what I'm
reading, the ISP1507 does have an integrated 5V charge pump. Or is it
simply a matter of how the board is designed?

(On our custom board, we have added an external vbus supply to be able
to draw > 100 mA.)

Thanks,
Orjan

--
Orjan Friberg
FlatFrog Laboratories AB