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