Re: Raspberry Pi POE+ hat overlay
Mark Millard <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.arm |
|---|---|
| Message-ID | <[email protected]> |
On May 12, 2023, at 10:11, Mark Millard <[email protected]> wrote: > On May 12, 2023, at 09:38, Doug Rabson <[email protected]> wrote: > >> On Fri, 12 May 2023 at 17:27, Mark Millard <[email protected]> wrote: >> On May 12, 2023, at 08:43, Doug Rabson <[email protected]> wrote: >> >>> I have a pi4 with the official POE+ hat which I want to run FreeBSD on. One thing I noticed is that the fan doesn't run in FreeBSD so I decided to try and write a little driver for it. First step seems to be to load the corresponding devicetree overlay by adding something like this to /boot/msdos/config.txt: >>> >>> dtoverlay=rpi-poe-plus >>> dtparam=poe_fan_temp0=45000,dtparam=poe_fan_temp0_hyst=3000 >>> dtparam=poe_fan_temp1=50000,dtparam=poe_fan_temp1_hyst=3000 >>> dtparam=poe_fan_temp2=62000,dtparam=poe_fan_temp2_hyst=4000 >>> dtparam=poe_fan_temp3=70000,dtparam=poe_fan_temp3_hyst=5000 >>> >>> Unfortunately this is where I'm stuck - the overlay is not present in the final DTB given to the kernel so there isn't anything to hook a driver to. Are dtoverlays supposed to work on FreeBSD? >> >> The RPi* firwmare version that FreeBSD has in ports and uses >> in making snapshots and other images does not have that overlay: >> >> # ls -Tld /usr/local/share/rpi-firmware/overlays/rpi* >> -rw-r--r-- 1 root wheel 489 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-backlight.dtbo >> -rw-r--r-- 1 root wheel 4081 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-cirrus-wm5102.dtbo >> -rw-r--r-- 1 root wheel 643 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-dac.dtbo >> -rw-r--r-- 1 root wheel 2574 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-display.dtbo >> -rw-r--r-- 1 root wheel 842 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-ft5406.dtbo >> -rw-r--r-- 1 root wheel 2937 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-poe.dtbo >> -rw-r--r-- 1 root wheel 771 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-proto.dtbo >> -rw-r--r-- 1 root wheel 893 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-sense.dtbo >> -rw-r--r-- 1 root wheel 567 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpi-tv.dtbo >> -rw-r--r-- 1 root wheel 1226 Mar 3 05:29:57 2021 /usr/local/share/rpi-firmware/overlays/rpivid-v4l2.dtbo >> >> You do not mention establishing a copy of overlays/rpi-poe-plus.dtbo . >> >> I copied the file from a rasbian install I had for another project. Perhaps I should find the corresponding source for it and build it with the device tree source from FreeBSD. >> >> You also do not mention what version of FreeBSD you are using >> on the RPi4B. The output of the command: >> >> I'm running 13.2-RELEASE-p0 > > That limits the range of firmware you can experiment with > but the following tagged vintages should be compatible and > also have an overlays/rpi-poe-plus.dtbo present: > > 1.20210527/boot/overlays/rpi-poe-plus.dtbo > 1.20210727/boot/overlays/rpi-poe-plus.dtbo > 1.20210805/boot/overlays/rpi-poe-plus.dtbo > > So extracting a consistent/full set of firmware and trying > it is a possibility. > > The first 3 tags links on: > > https://github.com/raspberrypi/linux/tags?after=1.20210831 > > are for the above 3 firmware versions. > > Anything newer will lead to a FreeBSD kernel crash for > 13.2-RELEASE-p0 due to mishandling the .dtb file that > would be used. > > As an example of what is in . . ./boot/ from one of those 3: > > # ls -Tld firmware-1.20210805/boot/* > -rw-rw-r-- 1 root wheel 18693 Aug 5 04:11:18 2021 firmware-1.20210805/boot/COPYING.linux > -rw-rw-r-- 1 root wheel 1594 Aug 5 04:11:18 2021 firmware-1.20210805/boot/LICENCE.broadcom > -rw-rw-r-- 1 root wheel 26401 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2708-rpi-b-plus.dtb > -rw-rw-r-- 1 root wheel 25749 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2708-rpi-b-rev1.dtb > -rw-rw-r-- 1 root wheel 26138 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2708-rpi-b.dtb > -rw-rw-r-- 1 root wheel 26060 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2708-rpi-cm.dtb > -rw-rw-r-- 1 root wheel 27076 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2708-rpi-zero-w.dtb > -rw-rw-r-- 1 root wheel 25883 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2708-rpi-zero.dtb > -rw-rw-r-- 1 root wheel 27276 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2709-rpi-2-b.dtb > -rw-rw-r-- 1 root wheel 27425 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2710-rpi-2-b.dtb > -rw-rw-r-- 1 root wheel 29542 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2710-rpi-3-b-plus.dtb > -rw-rw-r-- 1 root wheel 28923 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2710-rpi-3-b.dtb > -rw-rw-r-- 1 root wheel 27421 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2710-rpi-cm3.dtb > -rw-rw-r-- 1 root wheel 49825 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2711-rpi-4-b.dtb > -rw-rw-r-- 1 root wheel 49821 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2711-rpi-400.dtb > -rw-rw-r-- 1 root wheel 50499 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bcm2711-rpi-cm4.dtb > -rw-rw-r-- 1 root wheel 52456 Aug 5 04:11:18 2021 firmware-1.20210805/boot/bootcode.bin > -rw-rw-r-- 1 root wheel 7278 Aug 5 04:11:18 2021 firmware-1.20210805/boot/fixup.dat > -rw-rw-r-- 1 root wheel 5407 Aug 5 04:11:18 2021 firmware-1.20210805/boot/fixup4.dat > -rw-rw-r-- 1 root wheel 3211 Aug 5 04:11:18 2021 firmware-1.20210805/boot/fixup4cd.dat > -rw-rw-r-- 1 root wheel 8416 Aug 5 04:11:18 2021 firmware-1.20210805/boot/fixup4db.dat > -rw-rw-r-- 1 root wheel 8418 Aug 5 04:11:18 2021 firmware-1.20210805/boot/fixup4x.dat > -rw-rw-r-- 1 root wheel 3211 Aug 5 04:11:18 2021 firmware-1.20210805/boot/fixup_cd.dat > -rw-rw-r-- 1 root wheel 10262 Aug 5 04:11:18 2021 firmware-1.20210805/boot/fixup_db.dat > -rw-rw-r-- 1 root wheel 10262 Aug 5 04:11:18 2021 firmware-1.20210805/boot/fixup_x.dat > drwxrwxr-x 2 root wheel 236 Aug 5 04:11:18 2021 firmware-1.20210805/boot/overlays > -rw-rw-r-- 1 root wheel 2959904 Aug 5 04:11:18 2021 firmware-1.20210805/boot/start.elf > -rw-rw-r-- 1 root wheel 2235712 Aug 5 04:11:18 2021 firmware-1.20210805/boot/start4.elf > -rw-rw-r-- 1 root wheel 799964 Aug 5 04:11:18 2021 firmware-1.20210805/boot/start4cd.elf > -rw-rw-r-- 1 root wheel 3731528 Aug 5 04:11:18 2021 firmware-1.20210805/boot/start4db.elf > -rw-rw-r-- 1 root wheel 2987720 Aug 5 04:11:18 2021 firmware-1.20210805/boot/start4x.elf > -rw-rw-r-- 1 root wheel 799964 Aug 5 04:11:18 2021 firmware-1.20210805/boot/start_cd.elf > -rw-rw-r-- 1 root wheel 4803496 Aug 5 04:11:18 2021 firmware-1.20210805/boot/start_db.elf > -rw-rw-r-- 1 root wheel 3711432 Aug 5 04:11:18 2021 firmware-1.20210805/boot/start_x.elf Note the lack of config.txt , armstub8-gic.bin , and armstub8.bin . > (I'll not list the overlays/* .) > > I've no clue to the consequences of mixing and matching > materials from different vintages of the firmware. It > does appear that: > > 1.20210727/boot/overlays/rpi-poe-plus.dtbo > 1.20210805/boot/overlays/rpi-poe-plus.dtbo > > (the newer 2 of th3 3) are the same by content but that: > > 1.20210527/boot/overlays/rpi-poe-plus.dtbo > > is distinct in its older content. Be warned that the sys-utils/rpi-firmware port installs a couple of files that are not based on https://github.com/raspberrypi/ materials: # ls -Tld /boot/efi/armstub8* -rwxr-xr-x 1 root wheel 5888 Apr 20 19:25:22 2022 /boot/efi/armstub8-gic.bin -rwxr-xr-x 1 root wheel 5888 Apr 20 19:25:22 2022 /boot/efi/armstub8.bin Be sure to keep those 2 files in place (for at least armstub8-gic.bin ). A similar point goes for your config.txt . === Mark Millard marklmi at yahoo.com