On Tue, Sep 25, 2018 at 02:36:37PM +0200, Mikkel Pihl wrote: > I am trying to timestamp external events (dmtimer PWM) with a Beaglebone > Black and kernel 4.9.65-rt23 > > I followed a guide here: > http://processors.wiki.ti.com/index.php/Linux_Core_CPSW_User%27s_Guide#Example_of_using_Time_stamp_external_events_on_am335x > > When using testptp to read external time stamps i get the error below. > > Do you have an idea what I am doing wrong? I am pretty new to Linux, so i > have possibly misunderstood something. > > Thank you, > Mikkel > > root@am335x-evm:/usr/bin/kselftests/ptp# ./testptp -e 1 -i 3 > [ 176.667610] PTP_CLK_REQ_EXTTS: index = 3, on = 1 > [ 176.672320] Unable to handle kernel NULL pointer dereference at virtual > address 00000014
The TI vendor kernels are broken. I am about to post mainline support for the external inputs on the CPTS device. It is tested and working on the BBB. Please watch the linux-netdev list. Thanks, Richard _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
