Am Donnerstag, den 01.11.2012, 17:30 -0600 schrieb Stephen Warren: > On 11/01/2012 05:17 PM, Lucas Stach wrote: > > Hi Stephen, > > > > Am Donnerstag, den 01.11.2012, 16:14 -0600 schrieb Stephen Warren: > >> From: Stephen Warren <swar...@nvidia.com> > >> > >> TrimSlice's USB1 port has two purposes; it either acts as a device port > >> hosting Tegra's USB recovery protocol, or acts as a host port connected > >> to the internal USB->SATA bridge chip, which may in turn be connected to > >> an SSD or HDD. Add the appropriate device tree and board configuration > >> options to enable this port as a host port, and route the port to the > >> SATA bridge using the VBUS GPIO. > >> > > Hm, I don't really like to abuse the VBUS GPIO for this function. As the > > GPIO controlled routing is more a sort of pinmux can't you just add the > > GPIO enable to pin_mux_usb()? > > I don't know, I think it's fine. It's certainly this way in the kernel. > And for all I know, this GPIO does actually affect VBUS as well as > flipping any mux (and the more I think about that, the more likely it > is) although I can't actually know for sure since I don't have the > schematics. > If it's really triggering VBUS I'm fine with this, but then the comment in pin_mux_usb() is a bit off.
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