09-05-2012 03:28 PM
I want to test the gpio on ps for zynq702 board. I tried to follow the instructions on http://wiki.xilinx.com/osl-gpio-driver, but nothing toggles.
What's the right way to test the zynq gpio on ps?
09-05-2012 05:48 PM
It might be that the pin you are using is not mux'ed to the GPIO controller. That is setup via the MIO registers. The registers are usually initialized by the FSBL. U-boot can change the registers but I think the code got removed in 14.2. The code was ifdef'ed out. Might be in 14.1. Last time I checked, Linux does not modify the MIO registers.
09-06-2012 12:16 AM