Increase frequency of HPSGPIO

Hi snehal_p,

I try to check further regarding the gpio limitation on arm cortex a9 for the HPS.

It shows that:

"The PL061 PrimeCell General Purpose Input/Output (GPIO) is an AMBA compliant SoC peripheral that is developed, tested, and licensed by ARM Limited. Use the GPIO to generate or detect low frequency signals (less than 1MHz)."

https://developer.arm.com/documentation/dui0440/b/programmer-s-reference/general-purpose-input-output--gpio

It seems that the frequency you are capable of generating also meet around that range due to the limitation of the GPIO regardless of the instruction cycles which involves in the gpio toggling operation.

Thanks.

Regards,

Aik Eu