On Wed, Apr 15, 2020 at 8:47 AM Grygorii Strashko <grygorii.strashko@xxxxxx> wrote: > > > > On 15/04/2020 16:20, Robert Nelson wrote: > > Hi Grygorii, > > > > On Wed, Apr 15, 2020 at 8:15 AM Grygorii Strashko > > <grygorii.strashko@xxxxxx> wrote: > >> > >> For this platforms the dynamic GPIO muxing/configuration is not supported, and GPIO block by itself > >> does not provide such functions as pullup/pulldown. > > > > Correct, that's the state today, while Drew is investing time into > > trying to figure out how to properly extend this feature into our > > platform. > > Sry, but it's not clear what's the final target (at least from public part of this thread). We are mainly targeting am335x based devices. Today (well last few years) we've utilized a "hack-ish" kernel module (bone-pinmux-helper) to allow users to overide/change the pinmux-ing directly from user-space... (This evil module allows us to specify a list of options for each pin, thus users can easily configure specifies of the pin, aka gpio_pd/gpio_pu/etc from user-space...). Since that time, mainline has now grown a generic gpio pull-up/pull-down functionality, with the ability to re-control these values directly from a generic gpio library (libgpiod). Regards, -- Robert Nelson https://rcn-ee.com/
