On Tue, Nov 27, 2012 at 6:30 PM, Felipe Balbi <balbi@xxxxxx> wrote: > On Tue, Nov 27, 2012 at 04:42:47PM +0200, Roger Quadros wrote: >> Kevin, >> >> I gave a quick look at the issue. It seems that the High Speed USB Host >> module is kept in Software forced wakeup mode as a quick fix workaround >> to a bunch of silicon erratas. And we do nothing on USB global suspend. >> That's why CORE does not hit retention. >> >> If we runtime_suspend the USB host module on USB global suspend then it >> will be put in Force Idle mode. This will allow CORE to hit retention >> but then we will no longer be able to detect USB device connect events. >> >> So, till we have a better solution I will suggest to keep EHCI_HCD as a >> module in omap2plus_defconfig. > > I guess that "better solution" would be I/O pads wakeup interrupts ? But > I don't think that's already in mainline, is it ? I believe there was attempt to mainline that but it was rejected by Tony: http://marc.info/?l=linux-omap&m=134727428329745&w=2 Hopefully someone can come up with a suitable solution, not being able to suspend and broken power saving with EHCI sucks :( -- Gražvydas -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
