mxs_reg_to_offset
void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);
void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);
void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);
void __iomem *addr = uap->port.membase + mxs_reg_to_offset(uap, reg);