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Date: Tue, 30 Jun 2020 14:34:23 -0700 From: Tony Lindgren <tony@...mide.com> To: Drew Fustini <drew@...gleboard.org> Cc: Rob Herring <robh+dt@...nel.org>, bcousson@...libre.com, linux-omap@...r.kernel.org, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, Jason Kridner <jkridner@...gleboard.org>, Robert Nelson <robertcnelson@...il.com>, "H . Nikolaus Schaller" <hns@...delico.com>, Linus Walleij <linus.walleij@...aro.org> Subject: Re: [PATCH v2] ARM: dts: am335x-pocketbeagle: set default mux for gpio pins * Drew Fustini <drew@...gleboard.org> [200630 21:32]: > On Tue, Jun 30, 2020 at 11:20:37AM -0700, Tony Lindgren wrote: ... > > > > Needing to change the dts does not sound good to me.. But maybe you mean > > > > this is needed until the gpio-omap and pinctrl-single patches are merged? > > > > > > I agree that I would like for userspace to be able to do run-time > > > changes. However, I think something would need to be added to the > > > pinconf support in pinctrl-single for that to be possible. There are > > > bias properties but non for receiver enable. > > > > > > Does it seem sensible to add that? > > > > Well let's see with Linus W says. To me it seems this might be a good > > reason to allow a sysfs interface to change the pinctrl if we don't > > have it yet? With the proper gpio line naming it should be quite simple > > to use too :) > > I think if pinctrl-single allowed mux to be set through debugfs that > could be one solution to the use case of users prototyping with a > beaglebone. Maybe that could be acceptable? I think this should not depend on debugfs though, it should be a generic interface. Regards, Tony
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