Messages in this thread |  | | Date | Thu, 26 Dec 2019 11:47:45 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH 1/3] phy: cpcap-usb: Prevent USB line glitches from waking up modem |
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On Sun 2019-12-22 10:17:02, Tony Lindgren wrote: > The micro-USB connector on Motorola Mapphone devices can be muxed between > the SoC and the mdm6600 modem. But even when used for the SoC, configuring > the PHY with ID pin grounded will wake up the modem from idle state. Looks > like the issue is probably caused by line glitches. > > We can prevent the glitches by using a previously unknown mode of the > GPIO mux to prevent the USB lines from being connected to the moden while > configuring the USB PHY, and enable the USB lines after configuring the > PHY. > > Note that this only prevents waking up mdm6600 as regular USB A-host mode, > and does not help when connected to a lapdock. The lapdock specific issue > still needs to be debugged separately. > > Cc: Merlijn Wajer <merlijn@wizzup.org> > Cc: Pavel Machek <pavel@ucw.cz> > Cc: Sebastian Reichel <sre@kernel.org> > Signed-off-by: Tony Lindgren <tony@atomide.com>
Nothing obviously wrong in the series.
Acked-by: Pavel Machek <pavel@ucw.cz>
Patch 2/ does not apply on top of 5.5-rc3 AFAICT.
Best regards, Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html [unhandled content-type:application/pgp-signature] |  |