How to disable JTAG on IMX95 and reuse JTAG as GPIO

[yxjiang]

HelloI would like to use these GPIOs for JTAG to control other devices, but I found that these GPIOs cannot be controlled with JTAG.How can I disable JTAG and repurpose it as GPIO?

[JorgeCas · Accepted solution]

Hello,

To disable JTAG I suggest you take a look in security reference manual, there is a section where describes the fuse to disable this function in the processor.

Once you disabled the JTAG you need to change the IOMUX registers (in device tree for example) to configure JTAG pins as GPIO functions.

Best regards.

[yxjiang]

Hello，
1. I couldn't find the download link for the manual. Could you please send me the download link?
2. Is there any other way to disable this function besides using fuses?
3. I haven't modified the jtag configuration yet. The/sys/class/gpio pins in the system cannot be controlled because they are reused as jtag by default?