Hi, On Wed, Aug 12, 2015 at 08:09:27AM +1000, NeilBrown wrote: > On Tue, 11 Aug 2015 23:34:17 +0200 Alexander Holler > <hol...@ahsoftware.de> wrote: > > > Am 11.08.2015 um 10:29 schrieb NeilBrown: > > > > > With the current mainline code (plus my twl4030 charger enhancements, > > > which are not deeply relevant), the refcount does go to zero when > > > nothing is plugged in, and goes to 2 when a regular USB cable is > > > plugged in. > > > > Also I think it's just a little miswording (or extended typo), I'm not > > using a regular USB cable, but an OTG cable when using the host mode of > > the musb on the Beagleboard. Just to avoid confusion. Or do you talk > > about the client mode when it goes to 2? > > With an OTG cable, the usage_count would probably got to '1' because > the charger wouldn't be interested. > > However the important point is that the usage_count goes to zero when > no cable is plugged in. > > > > > Besides that, I'm sorry to not be of further help. My deeper knowledge > > about the musb sources in the kernel and u-boot (and the HW in > > question), has gone lost and I've currently no real reason to refresh > > that. ;) > > Just reporting the problem is sometimes 90% for the bug fixed. > I'm confident I know what is happening. What isn't clear is how best > to fix it without breaking something else... I suspect Felipe can help > with that.
It'll take me a while to be able to look at this. I don't have any platform with TWL4030 (IIRC, AM335x uses tps65218 instead). Besides, I have a slightly bigger problem to look at (MUSB + some hubs + CP2108 fails sometimes). If I get some time, I'll try to have a look, but it might take a few weeks. cheers -- balbi
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