Hello, 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 [ 176.683628] pgd = d79b4000 [ 176.686355] [00000014] *pgd=9b5bf831, *pte=00000000, *ppte=00000000 [ 176.694461] Internal error: Oops: 17 [#1] PREEMPT ARM [ 176.694553] Modules linked in: pvrsrvkm(O) usb_f_acm u_serial pru_rproc pruss_intc pruss usb_f_ecm m) [ 176.694565] CPU: 0 PID: 995 Comm: testptp Tainted: G O 4.9.65-rt23-g7069a470d5 #1 [ 176.694568] Hardware name: Generic AM33XX (Flattened Device Tree) [ 176.694573] task: d7990d00 task.stack: d78aa000 [ 176.694591] PC is at pinctrl_select_state+0xc/0x15c [ 176.694607] LR is at cpts_ptp_enable+0x110/0x278 [ 176.694612] pc : [<c03e0838>] lr : [<c057e6f8>] psr: 200e0013 [ 176.694612] sp : d78abcf0 ip : d78abd18 fp : d78abd14 [ 176.694615] r10: 00000000 r9 : dc263074 r8 : 00000001 [ 176.694619] r7 : 00000008 r6 : 00000001 r5 : 00000801 r4 : dc263020 [ 176.694622] r3 : 00000801 r2 : 00000000 r1 : 00000000 r0 : 00000000 [ 176.694628] Flags: nzCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 176.694632] Control: 10c5387d Table: 979b4019 DAC: 00000051 [ 176.694636] Process testptp (pid: 995, stack limit = 0xd78aa208) [ 176.694640] Stack: (0xd78abcf0 to 0xd78ac000) [ 176.694647] bce0: dc263020 00000801 00000001 00000008 [ 176.694655] bd00: 00000001 dc263074 d78abd3c d78abd18 c057e6f8 c03e0838 dc263020 00000000 [ 176.694663] bd20: beb9c900 00000051 beb9c900 d78aa000 d78abedc d78abd40 c05d11f0 c057e5f4 [ 176.694671] bd40: dc69e040 00000000 0fa00000 d78abdac dc69e040 dc69e080 db085900 db085900 [ 176.694679] bd60: d78abd7c d78abd70 c015ea8c c01605bc d78abda4 d78abd80 c0186450 c015ea88 [ 176.694687] bd80: 00000000 db21b410 00000003 00000001 00000000 00000000 c03ba90c c07937b8 [ 176.694695] bda0: dbd108c0 c0997c18 dc613000 ffffffff d78abddc d78abdc0 c022f8ec c016f7d0 [ 176.694703] bdc0: 00000000 ffffffff 00000000 00000000 d78abdec d78abde0 c022fabc c022f88c [ 176.694711] bde0: d78abe14 d78abdf0 c0218c28 c022fa9c 00000000 00000002 db802460 00000000 [ 176.694719] be00: 00000000 d78abea8 d78abea4 d78abe18 c021cf78 c0218ba0 d78db688 00000040 [ 176.694727] be20: d78abe5c d78db688 00000040 8fd3518f c0997b84 d78aa000 c01e5fa4 c0116a40 [ 176.694735] be40: 00000000 d78abeb0 00000041 db085900 00000000 00000006 dce43f54 00000002 [ 176.694742] be60: 00000002 db21b410 dc613010 dbd108c0 d798a234 00000000 d78abea4 00000003 [ 176.694750] be80: d78abea8 d78abf5c 00000001 c0107dc4 d78aa000 00000000 dc69e000 dc69e080 [ 176.694758] bea0: beb9c900 00000003 d78abec4 d78abeb8 c07915b0 40103d02 dc69e000 beb9c900 [ 176.694766] bec0: 00000003 beb9c900 d78aa000 00000000 d78abefc d78abee0 c01862ac c05d0fac [ 176.694774] bee0: beb9c900 db21b410 db085900 00000003 d78abf7c d78abf00 c0220f04 c018627c [ 176.694782] bf00: db085908 c07937b8 c021db80 00000002 00000002 db77c000 db085900 db77c000 [ 176.694789] bf20: 00000020 db085908 d78abf4c d78abf38 c021db30 c01fdd28 00000003 db085900 [ 176.694797] bf40: d78abf94 d78abf50 c020d8e8 c021dad0 00000000 db085900 00000003 db085900 [ 176.694805] bf60: 40103d02 beb9c900 d78aa000 00000000 d78abfa4 d78abf80 c02217ec c0220e68 [ 176.694813] bf80: ffffffff 00000000 ffffffe3 00000036 c0107dc4 d78aa000 00000000 d78abfa8 [ 176.694820] bfa0: c0107c00 c02217bc ffffffff 00000000 00000003 40103d02 beb9c900 00000000 [ 176.694828] bfc0: ffffffff 00000000 ffffffe3 00000036 00022320 beb9cd95 000118ec 00000003 [ 176.694836] bfe0: b6e76111 beb9c89c 000114f4 b6e76116 000e0030 00000003 00000000 00000000 [ 176.694839] Backtrace: [ 176.694851] [<c03e082c>] (pinctrl_select_state) from [<c057e6f8>] (cpts_ptp_enable+0x110/0x278) [ 176.694859] r9:dc263074 r8:00000001 r7:00000008 r6:00000001 r5:00000801 r4:dc263020 [ 176.694869] [<c057e5e8>] (cpts_ptp_enable) from [<c05d11f0>] (ptp_ioctl+0x250/0x760) [ 176.694876] r9:d78aa000 r8:beb9c900 r7:00000051 r6:beb9c900 r5:00000000 r4:dc263020 [ 176.694888] [<c05d0fa0>] (ptp_ioctl) from [<c01862ac>] (posix_clock_ioctl+0x3c/0x58) [ 176.694896] r10:00000000 r9:d78aa000 r8:beb9c900 r7:00000003 r6:beb9c900 r5:dc69e000 [ 176.694899] r4:40103d02 [ 176.694911] [<c0186270>] (posix_clock_ioctl) from [<c0220f04>] (do_vfs_ioctl+0xa8/0x954) [ 176.694916] r7:00000003 r6:db085900 r5:db21b410 r4:beb9c900 [ 176.694923] [<c0220e5c>] (do_vfs_ioctl) from [<c02217ec>] (SyS_ioctl+0x3c/0x64) [ 176.694930] r10:00000000 r9:d78aa000 r8:beb9c900 r7:40103d02 r6:db085900 r5:00000003 [ 176.694933] r4:db085900 [ 176.694948] [<c02217b0>] (SyS_ioctl) from [<c0107c00>] (ret_fast_syscall+0x0/0x44) [ 176.694955] r9:d78aa000 r8:c0107dc4 r7:00000036 r6:ffffffe3 r5:00000000 r4:ffffffff [ 176.694964] Code: e89da800 e1a0c00d e92ddbf0 e24cb004 (e5902014) [ 177.166363] ---[ end trace 0000000000000002 ]--- Segmentation fault Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694461] Internal error: Oops: 17 [#1] PREEMPT ARM Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694636] Process testptp (pid: 995, stack limit = 0xd78aa208) Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694640] Stack: (0xd78abcf0 to 0xd78ac000) Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694647] bce0: dc263020 00000801 00000001 0000008 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694655] bd00: 00000001 dc263074 d78abd3c d78abd18 c057e6f8 c03e0838 dc263020 0000000 root@am335x-evm:/usr/bin/kselftests/ptp# Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694663] bd20: beb9c900 00000051 beb9c900 d78aa000 d78abedc d78abd40 c05d11f0 c057e54 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694671] bd40: dc69e040 00000000 0fa00000 d78abdac dc69e040 dc69e080 db085900 db08590 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694679] bd60: d78abd7c d78abd70 c015ea8c c01605bc d78abda4 d78abd80 c0186450 c015ea8 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694687] bd80: 00000000 db21b410 00000003 00000001 00000000 00000000 c03ba90c c079378 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694695] bda0: dbd108c0 c0997c18 dc613000 ffffffff d78abddc d78abdc0 c022f8ec c016f70 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694703] bdc0: 00000000 ffffffff 00000000 00000000 d78abdec d78abde0 c022fabc c022f8c Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694711] bde0: d78abe14 d78abdf0 c0218c28 c022fa9c 00000000 00000002 db802460 0000000 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694719] be00: 00000000 d78abea8 d78abea4 d78abe18 c021cf78 c0218ba0 d78db688 0000000 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694727] be20: d78abe5c d78db688 00000040 8fd3518f c0997b84 d78aa000 c01e5fa4 c0116a0 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694735] be40: 00000000 d78abeb0 00000041 db085900 00000000 00000006 dce43f54 0000002 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694742] be60: 00000002 db21b410 dc613010 dbd108c0 d798a234 00000000 d78abea4 0000003 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694750] be80: d78abea8 d78abf5c 00000001 c0107dc4 d78aa000 00000000 dc69e000 dc69e00 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694758] bea0: beb9c900 00000003 d78abec4 d78abeb8 c07915b0 40103d02 dc69e000 beb9c90 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694766] bec0: 00000003 beb9c900 d78aa000 00000000 d78abefc d78abee0 c01862ac c05d0fc Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694774] bee0: beb9c900 db21b410 db085900 00000003 d78abf7c d78abf00 c0220f04 c01862c Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694782] bf00: db085908 c07937b8 c021db80 00000002 00000002 db77c000 db085900 db77c00 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694789] bf20: 00000020 db085908 d78abf4c d78abf38 c021db30 c01fdd28 00000003 db08590 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694797] bf40: d78abf94 d78abf50 c020d8e8 c021dad0 00000000 db085900 00000003 db08590 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694805] bf60: 40103d02 beb9c900 d78aa000 00000000 d78abfa4 d78abf80 c02217ec c0220e8 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694813] bf80: ffffffff 00000000 ffffffe3 00000036 c0107dc4 d78aa000 00000000 d78abf8 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694820] bfa0: c0107c00 c02217bc ffffffff 00000000 00000003 40103d02 beb9c900 0000000 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694828] bfc0: ffffffff 00000000 ffffffe3 00000036 00022320 beb9cd95 000118ec 0000003 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694836] bfe0: b6e76111 beb9c89c 000114f4 b6e76116 000e0030 00000003 00000000 0000000 Broadcast message from systemd-journald@am335x-evm (Tue 2018-09-25 07:48:41 UTC): kernel[333]: [ 176.694964] Code: e89da800 e1a0c00d e92ddbf0 e24cb004 (e5902014)
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