Hi all,
I am building a distro for beaglebone based on openembedded, I am using kernel from meta-ti, which I want to configure to support uio_pruss driver. I am applying following patch to kernel [1]. With this, when DT node for pruss is enabled, the driver loads correctly, only displaying one message in kernel log: pruss_uio 4a300000.pruss: pins are not configured from the driver But when I configure pinctrl to set some pins in PRU mode and add this configuration to PRU node [2] then I get following line in kernel log: [ 9.364820] pruss_uio 4a300000.pruss: No children The messages I'm getting come from the patch (namely this part [3]). So AFAIU, if I don't set the pinctrl, it will complain and go to the rest of initialzation, but if pinctrl is set, it will try to find child nodes of pruss in DT and then fail if there are none. But I am unsure on why does it work that way? Should there be some child nodes of pruss in DT? I did not see anyone using PRU adding any children to it (except for replicape overlay [4]). Anyway, I would be glad if someone provided some clarity how am I supposed to configure DT and uio_pruss driver properly for PRU to work. [1] https://raw.githubusercontent.com/RobertCNelson/bb-kernel/am33x-v4.7/patches/pru_uio/0001-Making-the-uio-pruss-driver-work.patch [2] https://raw.githubusercontent.com/adamolek/beaglebone/master/pru/hcsr04/HCSR04-PRU.dts [3] http://pastebin.com/raw/7VxrtSzD [4] https://github.com/beagleboard/bb.org-overlays/blob/90dcb13667d9bf3649ab9b34faf5dd5fcf099403/src/arm/BB-BONE-REPLICAP-00B3.dts Regards, -- Maciej Sobkowski -- 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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/5b141f53-489e-4d4c-b6d8-0c9cdbd0a39c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
