We are developing edk2 bios image for our custom board which is based on Ampere SOC.
Custom board has Uart connections as below: Uart0
* DB9 connector (Uefi console) * CTS/RTS signals from SOC
Uart3
* DB9 connector * CTS/RTS signals from GPIO
We have following queries:
1. CTS/RTS signals have usage in edk2 ? or this is useful in OS level only ? 2. Where to enable CTS/RTS control register bits in edk2 source for ampere platform ? 3. Where to configure GPIO's for Uart3 CTS and RTS signals in edk2 source for ampere platform ? 4. Not able to find gpio pad configuration for ampere platform in edk2 source. 5. Could you please help to clarify the above queries ?
