Comments (24)
makermelissa
commented on September 25, 2024
1
I'm spinning up a BBB at the moment. Maybe we could do something like I did for Beaglebone AI: https://github.com/adafruit/Adafruit_Python_PlatformDetect/blob/main/adafruit_platformdetect/board.py#L257-L262
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RobertCNelson
commented on September 25, 2024
1
Give me 20 minutes, i'll have a kernel version vs location off eeprom database setup.. ;)
Just need to push an update and see what we have..
http://gfnd.rcn-ee.org:81/farm/uptime/
Regards,
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RobertCNelson
commented on September 25, 2024
1
i agree, that should be the safest for now.. i was little worried some where even more off..
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makermelissa
commented on September 25, 2024
Looks like the chip is right, but the board isn't.
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RobertCNelson
commented on September 25, 2024
Hi @makermelissa , i was also talking with @pdp7 about this... Maybe with the BeagleBone family we are trying to do too much... We try to support v3.8.x -> v5.17.x... @Dario503 found another interesting mainline change, as our eeprom location changed on mainline. ;)
sys/bus/nvmem/devices/0-00500/nvmem -> sys/bus/nvmem/devices/0-00501/nvmem
Any thoughts to allow our users to just hardcode it's a BeagleBone, and then define which interfaces, spi/i2c/etc, they want to use?
root@BeagleBone:~# uname -r
5.15.23-bone20
root@BeagleBone:~# tree /sys/bus/nvmem/devices/
/sys/bus/nvmem/devices/
├── 0-00501 -> ../../../devices/platform/ocp/44c00000.interconnect/44c00000.interconnect:segment@200000/44e0b000.target-module/44e0b000.i2c/i2c-0/0-0050/0-00501
└── omap_rtc_scratch0 -> ../../../devices/platform/ocp/44c00000.interconnect/44c00000.interconnect:segment@200000/44e3e074.target-module/44e3e000.rtc/omap_rtc_scratch0
2 directories, 0 files
root@BeagleBone:~# xxd /sys/bus/nvmem/devices/0-00501/nvmem
00000000: aa55 33ee 4133 3335 424e 4c54 4747 3141 .U3.A335BNLTGG1A
00000010: 3230 3230 3036 3030 3033 3537 ffff ffff 202006000357....
00000020: ffff ffff ffff ffff ffff ffff ffff ffff ................
00000030: ffff ffff ffff ffff ffff ffff 3243 4637 ............2CF7
00000040: 4631 3036 3030 3031 0000 0000 0000 ffff F1060001........
"0-00500"... is also not stable!!
The one solution, i don't want to do... I say only "v5.10.x" is supported, and then once a year we bump things..
The other crazy idea is epcohs, 3.8.x/bbb -> x, 4.14.x/bbb -> y, 5.4.x/bbb ->z ... but would be a mess...
Regards,
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ladyada
commented on September 25, 2024
hi there is no way to determine when code is running on a beaglebone?
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makermelissa
commented on September 25, 2024
Ok, looks like running detect.py works fine:
debian@beaglebone:~/Adafruit_Python_PlatformDetect/bin$ python3 detect.py
Chip id: AM33XX
Board id: BEAGLEBONE_BLACK
Is this a DragonBoard 410c? False
Is this a Pi 3B+? False
Is this a Pi 4B? False
Is this a 40-pin Raspberry Pi? False
Is this a Raspberry Pi Compute Module? False
Is this a BeagleBone Board? True
Is this a Giant Board? False
Is this a Coral Dev Board? False
Is this a Coral Dev Board Mini? False
Is this a MaaXBoard? False
Is this a MaaXBoard Mini? False
Is this a SiFive Unleashed? False
Is this a PYNQ Board? False
Is this a Rock Pi board? False
Is this a NanoPi board? False
Is this a Clockwork Pi board? False
Is this an embedded Linux system? True
Is this a generic Linux PC? False
Is this a UDOO Bolt? False
Is this an ASUS Tinker Board? False
Is this an STM32MP1 Board? False
Is this an OS environment variable special case? False
I'm, using the latest. Perhaps you're right about trying to support too wide of a range.
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makermelissa
commented on September 25, 2024
Oh, I guess it's not the latest. Just the latest recommended image with 4.19.94 kernel.
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makermelissa
commented on September 25, 2024
So yeah, looks like peeking at /proc/device-tree-model may be a workable alternative:
debian@beaglebone:~/Adafruit_Python_PlatformDetect/bin$ cat /proc/device-tree/model
TI AM335x BeagleBone Black
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RobertCNelson
commented on September 25, 2024
Personally... i've started moving away from that... too many clones...
https://github.com/RobertCNelson/boot-scripts/blob/master/boot/am335x_evm.sh#L136-L232
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makermelissa
commented on September 25, 2024
Ok, if you'd like to modify https://github.com/adafruit/Adafruit_Python_PlatformDetect/blob/main/adafruit_platformdetect/board.py#L219 to also check at the new location (probably right after checking the first location) and submit a PR, we'd be happy to take a look.
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RobertCNelson
commented on September 25, 2024
Okay, @makermelissa this is what i'm seeing:
tree /sys/bus/nvmem/devices/
4.19.94-ti-r71
4.19.94-ti-rt-r71
5.4.106-ti-r38
5.4.106-ti-rt-r38
5.4.161-bone63
5.4.161-bone-rt-r63
0-00500
tree /sys/bus/nvmem/devices/
5.10.90-ti-r36
5.10.90-ti-rt-r36
5.10.90-bone60
5.10.90-bone-rt-r60
5.15.23-bone20
5.15.23-bone20
0-00501
So something in the kernel ABI change... 0-00500 -> 0-00501 !!!
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makermelissa
commented on September 25, 2024
Good to know. We should have it just try the location it does now. If that fails, it should just try the second location. That way it just works for the different kernels.
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makermelissa
commented on September 25, 2024
It looks like you need elevated permissions to read the new location:
debian@beaglebone:~$ cat /sys/bus/nvmem/devices/0-00501/nvmem
cat: /sys/bus/nvmem/devices/0-00501/nvmem: Permission denied
Python isn't wanting to read it either without prepending a sudo.
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RobertCNelson
commented on September 25, 2024
Hi @makermelissa , I wonder if just fixed this, what is the permission of the directory..
ls -lh of that dir....
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makermelissa
commented on September 25, 2024
debian@beaglebone:~$ ls -lh /sys/bus/nvmem/devices/0-00501
lrwxrwxrwx 1 root root 0 Jan 1 2000 /sys/bus/nvmem/devices/0-00501 -> ../../../devices/platform/ocp/44c00000.interconnect/44c00000.interconnect:segment@200000/44e0b000.target-module/44e0b000.i2c/i2c-0/0-0050/0-00501
debian@beaglebone:~$ ls -lh /sys/bus/nvmem/devices/0-00501/nvmem
-rw------- 1 root root 0 Mar 1 19:22 /sys/bus/nvmem/devices/0-00501/nvmem
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makermelissa
commented on September 25, 2024
Or maybe you meant this:
debian@beaglebone:/sys/bus/nvmem/devices/0-00501$ ls -lh
total 0
-rw------- 1 root root 0 Mar 1 19:22 nvmem
lrwxrwxrwx 1 root root 0 Mar 1 19:24 of_node -> ../../../../../../../../../../firmware/devicetree/base/ocp/interconnect@44c00000/segment@200000/target-module@b000/i2c@0/baseboard_eeprom@50
drwxr-xr-x 2 root root 0 Mar 1 19:24 power
lrwxrwxrwx 1 root root 0 Jan 1 2000 subsystem -> ../../../../../../../../../../bus/nvmem
-r--r--r-- 1 root root 4.0K Mar 1 19:24 type
-rw-r--r-- 1 root root 4.0K Jan 1 2000 uevent
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RobertCNelson
commented on September 25, 2024
@makermelissa what version of bb-customizations does that image have?
root@BeagleBone:~# dpkg --list | grep bb-customizations
ii bb-customizations 1.20220119.0-0~bullseye+20220125 armhf beagleboard.org customizations
root@BeagleBone:~# ls -lah /sys/bus/nvmem/devices/0-00501/
total 0
drwxrwxr-x 3 root gpio 0 Jan 1 2000 .
drwxrwxr-x 4 root gpio 0 Jan 1 2000 ..
-rw-rw---- 1 root gpio 32K Jan 1 2000 nvmem
lrwxrwxrwx 1 root gpio 0 Mar 1 03:08 of_node -> ../../../../../../../../../../firmware/devicetree/base/ocp/interconnect@44c00000/segment@200000/target-module@b000/i2c@0/baseboard_eeprom@50
drwxrwxr-x 2 root gpio 0 Jan 1 2000 power
lrwxrwxrwx 1 root gpio 0 Mar 1 03:08 subsystem -> ../../../../../../../../../../bus/nvmem
-r--r--r-- 1 root gpio 4.0K Jan 1 2000 type
-rw-rw-r-- 1 root gpio 4.0K Jan 1 2000 uevent
okay.... i'm not sure now where the udev rule is triggered..
root@BeagleBone:~# cat /etc/udev/rules.d/* | grep eeprom
REgards,
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RobertCNelson
commented on September 25, 2024
debian@BeagleBone:~$ ls -lah /sys/bus/nvmem/devices/0-00501/
total 0
drwxrwxr-x 3 root gpio 0 Jan 1 2000 .
drwxrwxr-x 4 root gpio 0 Jan 1 2000 ..
-rw-rw---- 1 root gpio 32K Jan 1 2000 nvmem
lrwxrwxrwx 1 root gpio 0 Mar 1 03:08 of_node -> ../../../../../../../../../../firmware/devicetree/base/ocp/interconnect@44c00000/segment@200000/target-module@b000/i2c@0/baseboard_eeprom@50
drwxrwxr-x 2 root gpio 0 Jan 1 2000 power
lrwxrwxrwx 1 root gpio 0 Mar 1 03:08 subsystem -> ../../../../../../../../../../bus/nvmem
-r--r--r-- 1 root gpio 4.0K Jan 1 2000 type
-rw-rw-r-- 1 root gpio 4.0K Jan 1 2000 uevent
debian@BeagleBone:~$ cat /sys/bus/nvmem/devices/0-00501/nvmem | xxd
00000000: aa55 33ee 4133 3335 424e 4c54 3030 4330 .U3.A335BNLT00C0
00000010: 3235 3136 4242 424b 3236 3236 ffff ffff 2516BBBK2626....
00000020: ffff ffff ffff ffff ffff ffff ffff ffff ................
00000030: ffff ffff ffff ffff ffff ffff ffff ffff ................
00000040: ffff ffff ffff ffff ffff ffff ffff ffff ................
00000050: 3430 3035 3234 2b31 3330 312b 3030 3937 400524+1301+0097
00000060: 3636 2b31 3632 3558 5858 5858 5858 5858 66+1625XXXXXXXXX
debian@BeagleBone:~$ cat /etc/dogtag
BeagleBoard.org Debian Bullseye IoT Image 2022-02-28
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makermelissa
commented on September 25, 2024
Ok, that looks promising.
debian@beaglebone:/sys/bus/nvmem/devices/0-00501$ cat /etc/udev/rules.d/* | grep eeprom
# From: https://github.com/s-light/pocketbeagle_python_tests/blob/master/80-eeprom-noroot.rules
# /etc/udev/rules.d/80-eeprom-noroot.rules
# allow i2c group to read of eeprom
# /sys/bus/i2c/devices/0-0050/eeprom
# ls -l /sys/bus/i2c/devices/0-0050/eeprom /sys/bus/nvmem/devices/0-00500/nvmem
SUBSYSTEM=="i2c", DEVPATH=="*0-0050", RUN+="/bin/chown root:gpio /sys$env{DEVPATH}/eeprom", RUN+="/bin/chmod 0640 /sys$env{DEVPATH}/eeprom"
After a quick edit to the udev rules and a reboot it works.
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RobertCNelson
commented on September 25, 2024
building right now... rcn-ee/repos@f78bcd1
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makermelissa
commented on September 25, 2024
I'll submit a PR. Looks like it working great now. Users who upgrade will need to edit udev ruls though. File is /etc/udev/rules.d/80-eeprom-noroot.rules and just needs to be changed from 0-00500 to 0-00501
debian@beaglebone:~/Adafruit_Python_PlatformDetect/bin$ python3 detect.py
Chip id: AM33XX
Board id: BEAGLEBONE_BLACK
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makermelissa
commented on September 25, 2024
building right now... rcn-ee/repos@f78bcd1
even better
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RobertCNelson
commented on September 25, 2024
apt repo is now updated...
Should be fixed with:
sudo apt update
sudo apt upgrade
i was going to tag and update:
https://forum.beagleboard.org/t/debian-10-x-buster-monthly-snapshots/31203
today, but i'll delay it so this fix will be in our buster image.. (aka tomorrow's rebuild..)
Regards,
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