root@beaglebone:~# cat /sys/devices/platform/ocp/48304000.epwmss/48304180.eqep/position 

[  615.400669] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa304180
[  615.408497] pgd = dc470000
[  615.411260] [fa304180] *pgd=48211452(bad)
[  615.415402] Internal error: : 1028 [#1] PREEMPT SMP ARM
[  615.420707] Modules linked in: spidev uio_pruss c_can_platform c_can can_dev spi_omap2_mcspi pwm_tiecap tieqep pwm_tiehrpwm omap_aes_driver crypto_engine omap_sham 8021q garp mrp stp llc usb_f_acm u_serial usb_f_rndis u_ether libcomposite cpufreq_powersave cpufreq_userspace omap_rng cpufreq_conservative rng_core cpufreq_ondemand evdev tps65217_charger uio_pdrv_genirq uio
[  615.454633] CPU: 0 PID: 734 Comm: cat Not tainted 4.9.6-ti-r17 #1
[  615.460813] Hardware name: Generic AM33XX (Flattened Device Tree)
[  615.466995] task: dc17a700 task.stack: dc192000
[  615.471643] PC is at eqep_get_position+0x68/0x90 [tieqep]
[  615.477147] LR is at dev_attr_show+0x2c/0x58
[  615.481493] pc : [<bf0e3310>]    lr : [<c0893f1c>]    psr: 600f0013
sp : dc193e30  ip : 00000000  fp : dc193e44
[  615.493113] r10: 00000001  r9 : dc776f80  r8 : da8d5c18
[  615.498470] r7 : dc77f000  r6 : c0d855b4  r5 : dc77f000  r4 : dc430900
[  615.505122] r3 : fa304180  r2 : dc77f000  r1 : bf0e452c  r0 : da8d5c10
[  615.511777] Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM  Segment none
[  615.519045] Control: 10c5387d  Table: 9c470019  DAC: 00000051
[  615.524907] Process cat (pid: 734, stack limit = 0xdc192218)
[  615.530682] Stack: (0xdc193e30 to 0xdc194000)
[  615.535151] 3e20:                                     dc430900 bf0e452c dc193e5c dc193e48
[  615.543520] 3e40: c0893f1c bf0e32b4 dc430900 00001000 dc193e84 dc193e60 c035ffa4 c0893efc
[  615.551886] 3e60: dc430900 00000000 da814540 c130414c dc193f70 00000001 dc193e94 dc193e88
[  615.560252] 3e80: c035e954 c035ff18 dc193ef4 dc193e98 c03013dc c035e92c da6f22e0 dc193f70
[  615.568618] 3ea0: dc430930 b6ea1000 dc193eb0 00020000 00000000 00000000 00020000 da814548
[  615.576984] 3ec0: 00000004 00040906 00000000 00020000 da814540 b6ea1000 dc193f70 b6ea1000
[  615.585350] 3ee0: dc776f80 00000000 dc193f2c dc193ef8 c035f724 c0301200 dc193f3c dc193f08
[  615.593715] 3f00: c02d8fac 00020000 da814540 b6ea1000 dc193f70 b6ea1000 dc192000 00000000
[  615.602081] 3f20: dc193f3c dc193f30 c02d8290 c035f5fc dc193f6c dc193f40 c02d90ec c02d8274
[  615.610448] 3f40: 000b6ea0 c02fae4c dc193f6c da814540 c130414c da814540 00020000 b6ea1000
[  615.618815] 3f60: dc193fa4 dc193f70 c02da388 c02d905c 00000000 00000000 00000022 00040906
[  615.627180] 3f80: 00000000 00020000 00020000 b6ea1000 00000003 c01092c4 00000000 dc193fa8
[  615.635546] 3fa0: c0109100 c02da330 00020000 00020000 00000003 b6ea1000 00020000 000271c4
[  615.643912] 3fc0: 00020000 00020000 b6ea1000 00000003 7fffe000 00000000 00000000 00020000
[  615.652279] 3fe0: 00000000 bea5caa4 00013835 b6f4ac76 400f0030 00000003 7b7b33da 9e96bd2f
[  615.660717] [<bf0e3310>] (eqep_get_position [tieqep]) from [<c0893f1c>] (dev_attr_show+0x2c/0x58)
[  615.669821] [<c0893f1c>] (dev_attr_show) from [<c035ffa4>] (sysfs_kf_seq_show+0x98/0x108)
[  615.678205] [<c035ffa4>] (sysfs_kf_seq_show) from [<c035e954>] (kernfs_seq_show+0x34/0x38)
[  615.686666] [<c035e954>] (kernfs_seq_show) from [<c03013dc>] (seq_read+0x1e8/0x538)
[  615.694512] [<c03013dc>] (seq_read) from [<c035f724>] (kernfs_fop_read+0x134/0x1c0)
[  615.702358] [<c035f724>] (kernfs_fop_read) from [<c02d8290>] (__vfs_read+0x28/0x48)
[  615.710202] [<c02d8290>] (__vfs_read) from [<c02d90ec>] (vfs_read+0x9c/0x168)
[  615.717483] [<c02d90ec>] (vfs_read) from [<c02da388>] (SyS_read+0x64/0xcc)
[  615.724516] [<c02da388>] (SyS_read) from [<c0109100>] (ret_fast_syscall+0x0/0x3c)
[  615.732188] Code: e1a04003 e320f000 eafffff3 e5933004 (e5934000) 
[  615.738437] ---[ end trace 7936ced3381948b2 ]---