topic GPIO changes at flashing time in i.MX Processors

GPIO changes at flashing time

Tanushree — Mon, 08 Jul 2024 04:48:38 GMT

Hello,

We are using imx8dxl processor in our custom board.
We are facing an issue while flashing. The issue one celular module is connected to the processor GPIO. i.e power to the cellular module. if we isolate the GPIO and disconnect the USB from the cellular module then its flashing correctly. How to disable the GPIO in flashing time. During flashing time its starts from initramfs, can we disable in initramfs and how to do that?

Re: GPIO changes at flashing time

jimmychan — Tue, 09 Jul 2024 02:48:57 GMT

Are you using UUU to program your target board?

Re: GPIO changes at flashing time

Tanushree — Tue, 09 Jul 2024 04:03:54 GMT

Hello @jimmychan

Yes we are using UUU tool for flashing

Re: GPIO changes at flashing time

jimmychan — Tue, 09 Jul 2024 07:18:32 GMT

Do you have the debug console? when UUU is running, you could see the u-boot will up at the console. Then you could stop the u-boot and load another dtb file which is disable the gpio.