Mity CPU Platforms » MitySOM-AM62, MitySOM-AM62A, & MitySOM-AM62P

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09:53 PM Software Development: RE: Can't read state of output GPIO pins

Thank you, that would explain it. We ended up setting the pin regardless of the current state. It was an easier chang... Tim Troester

03/16/2026

06:05 PM Software Development: RE: Can't read state of output GPIO pins

At least for the AM62x, Pins that need to be read, must be pinmuxed as PIN_INPUT*. The only difference between the P... Jonathan Cormier

05:53 PM Software Development: Can't read state of output GPIO pins

Hi,
On an AM62x we have a gpio pin (/dev/gpiochip2, line 10) muxed as an output pin. Our application checks the st... Tim Troester

02/25/2026

05:05 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

Great glad it worked. Hopefully the dtc command examples will be helpful for you and others as well Jonathan Cormier

04:59 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

I md5sum'ed the SD dtb and the emmc dtb, they were in-fact different. I re-copied the files and now it is working. I ... Ben H

04:24 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

It would also be a good idea to md5sum the emmc and sdcard versions of the tfc dtb to make sure they are infact ident... Jonathan Cormier

04:23 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

Thanks Ben, I hadn't realized that.
Lets make sure the tfc device tree file contains what you expect it to.
Do ... Jonathan Cormier

03:35 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

can you also post the dtb file? Michael Williamson

03:21 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

Sorry, I just posted the u-boot log, it does indeed boot. Per the u-boot log it claims to load my dtb but the differe... Ben H

02:43 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

> Some progress made, it now finds the file but still does not load it.
It looks like it did load it from the eMMC s... Jonathan Cormier

02/24/2026

11:06 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

Hi Jonathan,
Some progress made, it now finds the file but still does not load it.
Here are the dtbs (the "-t... Ben H

10:47 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

Yeah please share the console log during the boot attempt.
To get a bit more debug info, enable xtrace in u-boot... Jonathan Cormier

10:38 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

Hi Jonathan,
Thanks for your reply. Unfortunately, that did not solve the problem. The system fails to find the fi... Ben H

09:26 PM Software Development: RE: AM62A eMMC Boot - Kernel Device Tree

Hi Ben,
The device tree file that gets loaded is set in the fdtfile variable. You should be able to update it to ... Jonathan Cormier

08:52 PM Software Development: AM62A eMMC Boot - Kernel Device Tree

I’m working with the AM62A SoM and a Yocto development environment, switching between the CL devkit and custom hardwa... Ben H