AXIS GPIO on ZYNQ Ultrascale+ hangs when reading and writing

[niconorena]

I have a linux image, and every time that I tryied to read the direction or the value the system hangs , I am force to power cycle the system.

I am working on the zcu102 developing board from Xilinx.

I followed this wiki https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18841846/AXI+GPIO

I am thinking that the kernel can't access the addresses where the IP was placed.  It is in my device tree as a node.

As an experiment I tried to read any space allocated under the address Editor with "devmem2" , but it behaves the same way , it just stall indefinitely unless I power cycle the board.

any ideas of what the issue can be?

[niconorena]

I tried to add the section of memory like shown in the wiki :

https://xilinx-wiki.atlassian.net/wiki/spaces/A/pages/18842412/Accessing+BRAM+In+Linux

But I was not able to see the section of memory of the axi GPIOs as described on the WIKI

[niconorena · Accepted solution]

solve it , found a post for some thing else but it was the same issue.

https://forums.xilinx.com/t5/Embedded-Linux/AXI-read-hangs/td-p/762508

you have to add "clk_ignore_unused" to the bootargs of the device tree. In the case that you have a uEnv.txt  config file , add bootargs to the  bootargs in the file as well.

This fixed my issue.