Yes, Linux beaglebone 4.4.68-ti-r110 #1 SMP Wed Jun 21 04:31:35 UTC 2017 armv7l GNU/Linux has some unexpected problems with UART's
We have a bunch of pcb's coming in and all of a sudden TTYO4 (hardwired) doesn't work. Cannot receive characters. Terminals were checked as active. Program worked fine on 3.8 kernels. lrwxrwxrwx 1 root root 5 Dec 24 12:29 /dev/ttyO0 -> ttyS0 lrwxrwxrwx 1 root root 5 Dec 24 12:29 /dev/ttyO1 -> ttyS1 lrwxrwxrwx 1 root root 5 Dec 24 12:29 /dev/ttyO2 -> ttyS2 lrwxrwxrwx 1 root root 5 Dec 24 12:29 /dev/ttyO4 -> ttyS4 I think capes load OK: root@beaglebone:~# dmesg | grep bone [ 0.000000] Kernel command line: console=ttyO0,115200n8 bone_capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN bone_capemgr.enable_partno=cape-universal root=/dev/mmcblk1p1 ro rootfstype=ext4 rootwait coherent_pool=1M net.ifnames=0 quiet cape_universal=enable [ 2.346745] bone_capemgr bone_capemgr: Baseboard: 'A335BNLT,AIA0,5016BBBI3094' [ 2.346780] bone_capemgr bone_capemgr: compatible-baseboard=ti,beaglebone-black - #slots=4 [ 2.385761] bone_capemgr bone_capemgr: slot #0: No cape found [ 2.425756] bone_capemgr bone_capemgr: slot #1: No cape found [ 2.465750] bone_capemgr bone_capemgr: slot #2: No cape found [ 2.505751] bone_capemgr bone_capemgr: slot #3: No cape found [ 2.505785] bone_capemgr bone_capemgr: enabled_partno PARTNO 'cape-universal' VER 'N/A' PR '0' [ 2.505798] bone_capemgr bone_capemgr: slot #4: override [ 2.505812] bone_capemgr bone_capemgr: Using override eeprom data at slot 4 [ 2.505827] bone_capemgr bone_capemgr: slot #4: 'Override Board Name,00A0,Override Manuf,cape-universal' [ 2.506195] bone_capemgr bone_capemgr: initialized OK. [ 2.746273] bone_capemgr bone_capemgr: slot #4: dtbo 'cape-universal-00A0.dtbo' loaded; overlay id #0 What can be done? -- 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]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/5b14e6f1-d19e-4073-8d3f-f643efb48bab%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
