sc16is7xx_port_read
val = sc16is7xx_port_read(port, SC16IS7XX_IOSTATE_REG);
val = sc16is7xx_port_read(port, SC16IS7XX_IODIR_REG);
u8 state = sc16is7xx_port_read(port, SC16IS7XX_IOSTATE_REG);
one->old_lcr = sc16is7xx_port_read(port, SC16IS7XX_LCR_REG);
lsr = sc16is7xx_port_read(port, SC16IS7XX_LSR_REG);
one->buf[0] = sc16is7xx_port_read(port, SC16IS7XX_RHR_REG);
txlen = sc16is7xx_port_read(port, SC16IS7XX_TXLVL_REG);
u8 msr = sc16is7xx_port_read(port, SC16IS7XX_MSR_REG);
iir = sc16is7xx_port_read(port, SC16IS7XX_IIR_REG);
rxlen = sc16is7xx_port_read(port, SC16IS7XX_RXLVL_REG);
lsr = sc16is7xx_port_read(port, SC16IS7XX_LSR_REG);