Enhancements: SX1509 GPIO driver returns 0 when reading an output pin

[vthakur7f]

Product: (OC-SDR, OC-LTE, OC-LTE, OC-Power, others)

OC-SDR

Component: (PSU, GBC, BBU, FEM, LED, ME)

GBC/FE/SDR

Category: (Hardware, Software/stack, Firmware/bootloader, Documentation)

Firmware/OCWare
Describe the solution you'd like
it should be straightforward enough to implement this functionality though since we cache all the register values on Tiva.

Is your feature request related to a problem? Please describe.
It seems that it's desirable to amend the OC-GPIO spec to allow OcGpio_read to return the state of output pins. The SX driver will currently return 0 for any reads performed on output pin.