ZYNQ_PINCONF_TRISTATE
if (!(reg & ZYNQ_PINCONF_TRISTATE))
if (reg & ZYNQ_PINCONF_PULLUP || reg & ZYNQ_PINCONF_TRISTATE)
tristate = ZYNQ_PINCONF_TRISTATE;
reg &= ~(ZYNQ_PINCONF_PULLUP | ZYNQ_PINCONF_TRISTATE);
reg &= ~(ZYNQ_PINCONF_PULLUP | ZYNQ_PINCONF_TRISTATE);