ZYNQ_PINCONF_DISABLE_RECVR
if (!(reg & ZYNQ_PINCONF_DISABLE_RECVR))
arg = !!(reg & ZYNQ_PINCONF_DISABLE_RECVR);
reg |= ZYNQ_PINCONF_DISABLE_RECVR;
reg &= ~ZYNQ_PINCONF_DISABLE_RECVR;