[Just cc'ing Greg as this commit is in the usb tree] On Fri, 2 Mar 2012 17:01:16 -0500 Paul Gortmaker <paul.gortmaker@xxxxxxxxxxxxx> wrote: > > This commit: > > --------------- > commit 637b78eb31e0b167ed913f1750bb645dfeda38f0 > Author: Tomoya MORINAGA <tomoya.rohm@xxxxxxxxx> > Date: Fri Feb 3 16:14:18 2012 +0900 > > usb: gadget: pch_udc: Detecting VBUS through GPIO with interrupt > > Problem: > pch_udc continues operation even if VBUS becomes Low. > pch_udc performs D+ pulling up before VBUS becomes High. > USB device should be controlled according to VBUS state. > > Root cause: > The current pch_udc is not always monitoring VBUS. > > Solution: > The change of VBUS is detected using an interrupt of GPIO. > If VBUS became Low, pch_udc handles 'disconnect'. > After VBUS became High, a pull improves D+, and pch_udc > handles 'connect'. > > [ balbi@xxxxxx : make it actually compile ] > > Signed-off-by: Tomoya MORINAGA <tomoya.rohm@xxxxxxxxx> > Signed-off-by: Felipe Balbi <balbi@xxxxxx> > --------------- > > breaks the sparc builds in next: > > http://kisskb.ellerman.id.au/kisskb/buildresult/5771890/ > http://kisskb.ellerman.id.au/kisskb/buildresult/5771905/ > > Thanks, > Paul. -- Cheers, Stephen Rothwell sfr@xxxxxxxxxxxxxxxx
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