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Paul Beam
Jul 27, 2020, 5:56:44 PM7/27/20
to BeagleBoard
Can someone tell me where am335x-pru0-fw and am335x-pru1-fw come from or when they get loaded? I'm trying to load my own firmware into the pru's on boot via systemd, and it's not working. I can do it manually, but on boot it seems to load this default firmware from somewhere. Or, is it better that I rename my pru firmware to these names and put it in some magical place so it is automatically loaded?
Robert Nelson
Jul 27, 2020, 6:06:39 PM7/27/20
to Beagle Board, rpau...@gmail.com
On Mon, Jul 27, 2020 at 4:57 PM Paul Beam <rpau...@gmail.com> wrote:
>
> Can someone tell me where am335x-pru0-fw and am335x-pru1-fw come from or when they get loaded? I'm trying to load my own firmware into the pru's on boot via systemd, and it's not working. I can do it manually, but on boot it seems to load this default firmware from somewhere. Or, is it better that I rename my pru firmware to these names and put it in some magical place so it is automatically loaded?
I assume you have it copied under /lib/firmware/ ?
>
> Can someone tell me where am335x-pru0-fw and am335x-pru1-fw come from or when they get loaded? I'm trying to load my own firmware into the pru's on boot via systemd, and it's not working. I can do it manually, but on boot it seems to load this default firmware from somewhere. Or, is it better that I rename my pru firmware to these names and put it in some magical place so it is automatically loaded?
Also just run:
sudo /opt/scripts/tools/developers/update_initrd.sh
This will update the initramfs so your versions are included..
Regards,
--
Robert Nelson
https://rcn-ee.com/
Paul Beam
Jul 27, 2020, 8:11:50 PM7/27/20
to BeagleBoard
Robert,
My firmware for the PRUs is in /lib/firmware, but it has different names. It is unclear to me whether a mechanism exists in the PocketBeagle for it to automatically load firmware into the PRUs or whether I need to create my own service. I have been, until today, loading them manually. If my systemd service waits until generic-board-setup is complete, then it loads my firmware. I can, of course, rename my firmware files. When I do a search for am335x-pru0-fw I don't find anything. To reduce boot time, I have deleted the initrd.
Robert Nelson
Jul 27, 2020, 10:02:32 PM7/27/20
to Beagle Board
On Mon, Jul 27, 2020 at 7:12 PM Paul Beam <rpau...@gmail.com> wrote:
>
> Robert,
>
> My firmware for the PRUs is in /lib/firmware, but it has different names. It is unclear to me whether a mechanism exists in the PocketBeagle for it to automatically load firmware into the PRUs or whether I need to create my own service. I have been, until today, loading them manually. If my systemd service waits until generic-board-setup is complete, then it loads my firmware. I can, of course, rename my firmware files. When I do a search for am335x-pru0-fw I don't find anything. To reduce boot time, I have deleted the initrd.
There is a default name specified in the device-tree..
>
> Robert,
>
> My firmware for the PRUs is in /lib/firmware, but it has different names. It is unclear to me whether a mechanism exists in the PocketBeagle for it to automatically load firmware into the PRUs or whether I need to create my own service. I have been, until today, loading them manually. If my systemd service waits until generic-board-setup is complete, then it loads my firmware. I can, of course, rename my firmware files. When I do a search for am335x-pru0-fw I don't find anything. To reduce boot time, I have deleted the initrd.
https://github.com/beagleboard/bb.org-overlays/blob/master/src/arm/AM335X-PRU-RPROC-4-19-TI-00A0.dts#L109
am335x-pru0-fw and am335x-pru1-fw
As long as it's called that, a copy saved in teh initramfs, it'll get
auto-loaded on bootup..
We don't ship any default firmware.
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