On Wed, Mar 17, 2021 at 12:40 PM John Allwine <j...@pocketnc.com> wrote:
>
> The kernel doesn't seem to be the problem. Even when I change to that version 
> my /dev/uio* devices aren't showing up. Am I missing a simple step somewhere?
>
> $ sudo /opt/scripts/tools/version.sh

> bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot SPL 
> 2019.04-00002-gc9b3922522 (Aug 24 2020 - 16:42:18 -0500)]:[location: dd MBR]
> bootloader:[microSD-(push-button)]:[/dev/mmcblk0]:[U-Boot 
> 2019.04-00002-gc9b3922522]:[location: dd MBR]
> bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot SPL 
> 2019.04-00002-gbb4af0f50f (Jul 08 2019 - 11:44:39 -0500)]:[location: dd MBR]
> bootloader:[eMMC-(default)]:[/dev/mmcblk1]:[U-Boot 
> 2019.04-00002-gbb4af0f50f]:[location: dd MBR]
> UBOOT: Booted Device-Tree:[am335x-boneblack-uboot-univ.dts]
> UBOOT: Loaded Overlay:[BB-ADC-00A0]
> UBOOT: Loaded Overlay:[BB-BONE-eMMC1-01-00A0]
> UBOOT: Loaded Overlay:[BB-HDMI-TDA998x-00A0]
> uboot_overlay_options:[uboot_overlay_pru=AM335X-PRU-UIO-00A0.dtbo]

Eh, I see the problem..

"uboot_overlay_pru=AM335X-PRU-UIO-00A0.dtbo" was a recent change..
While you have U-boot: 2019.04, it's either: Jul 08 2019 or Aug 24
2020, so let's fix that..

sudo apt update
sudo apt install bb-u-boot-am335x-evm

Then:

cd /opt/u-boot/bb-u-boot-am335x-evm/
sudo ./install.sh

sudo reboot

Then you should see the uio node here:

UBOOT: Booted Device-Tree:[am335x-boneblack-uboot-univ.dts]
UBOOT: Loaded Overlay:[AM335X-PRU-UIO-00A0]
UBOOT: Loaded Overlay:[BB-ADC-00A0]
UBOOT: Loaded Overlay:[BB-BONE-eMMC1-01-00A0]

Regards,

-- 
Robert Nelson
https://rcn-ee.com/

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