Hello Henrik, I'm happy that I found your post about Robert Nelsons Kernel 3.14 from https://github.com/RobertCNelson/bb-kernel/tree/am33x-v3.14 The built was successful. I cross compiled the Kernel on Ubuntu 14.04/PC
Now I try to figure out, how the PREEMPT_RT patch from https://www.kernel.org/pub/linux/kernel/projects/rt/3.14/ can be used I patched it like this: #cd bb-kernel # patch -p1 < patch-3.14.12-rt9.patch.gz <https://www.kernel.org/pub/linux/kernel/projects/rt/3.14/patch-3.14.12-rt9.patch.gz> #./rebuild.sh As it is cross compiled I'm not shure if menuconfig works? Please allow me the question. How do you patch the Kernel 3.14 thank you in advance Lupus Am Mittwoch, 14. Mai 2014 22:36:04 UTC+2 schrieb Henrik Foss: > > > Hi, > I'm currently running a 3.14 PREEMPT_RT build based of Robert C Nelsons > repository. I've got GPIO and uart up and running. And now my attention has > turned to the PRU. The 3.14 build does not have a capemanager so i setup my > device trees at build. > I based my PRU work of the old PRU patch: > https://github.com/beagleboard/kernel/blob/3.12/patches/pru/0001-These-are-the-patches-necessary-for-enabling-the-PRU.patchh > Now, booting gives me no error messages from uio_pruss. And uio0-7 appears > in /dev/. However, when running a test project (which ran perfectly fine > under non-modified 3.8 kernel) prussdrv_open() failes: Bus error > > This happens every time prussdrv_open tries to read from its memory mapped > areas like: > > if (pruss_io[(AM18XX_INTC_PHYS_BASE - AM18XX_DATARAM0_PHYS_BASE) >> 2] > == AM18XX_PRUSS_INTC_REV) > > > > Now the pruss is defined in am33xx.dtsi: > > pruss: pruss@4a300000 { > compatible = "ti,pruss-v2"; > ti,hwmods = "pruss"; > ti,deassert-hard-reset = "pruss", "pruss"; > reg = <0x4a300000 0x080000>; > ti,pintc-offset = <0x20000>; > interrupt-parent = <&intc>; > status = "okay"; > interrupts = <20 21 22 23 24 25 26 27>; > }; > > And one of my dtsi include files to the am335x-boneblack.dts enables it: > > &pruss { > status = "okay"; > pinctrl-names = "default"; > pinctrl-0 = <&pru_gpio_pins>; > }; > > I then modprobe uio_pruss before running the test application. > > I have little clue how to fix this, so any pointers or help would be much > appreciated:) > > -- 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]. For more options, visit https://groups.google.com/d/optout.
