Thanks for the answer, Charles. In the default overlay it's PULLDOWN: https://github.com/beagleboard/bb.org-overlays/blob/master/tools/pinmux-generator/BeagleBone_Black.dts#L691-L693
And this is what anybody gets when not installing your cape universal device tree blob. My question is still why? Am Freitag, 19. Oktober 2018 16:58:20 UTC+2 schrieb Charles Steinkuehler: > > On 10/19/2018 5:05 AM, TJF wrote: > > With kernel 4.14.x on Beaglebone Black board (may Green and White as > well) > > after boot the pin P9_11 is in muxmode > > > > GPIO INPUT PULLUP > > > > , while the config-pin default is > > > > GPIO INPUT PULLDOWN > > > > Why that difference? Shouldn't the boot mode and the default mode be > equal? > > 13 further pins show that difference. > > The default mode for P9_11 is an input with pull-up enabled: > > > https://github.com/cdsteinkuehler/beaglebone-universal-io/blob/master/cape-universal-00A0.dts#L392-L393 > > > The default pin modes for cape universal were set to match the reset > defaults of the AM3358, so loading the universal device-tree overlay > would not cause any physical change in the pin state. The reset > default states are listed in the AM3358 data-sheet (which is a > different document than the AM335x TRM). Most pins are are generally > GPIO inputs with either a pull-up or pull-down (pin dependent) after > reset. > > -- > Charles Steinkuehler > [email protected] <javascript:> > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/20b762c0-1f7b-49e6-8792-ea79e2b720ba%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
