via_read_reg
#define viafb_read_reg(p, i) via_read_reg(p, i)
reg = via_read_reg(VIASR, gpio->vg_port_index);
reg = via_read_reg(VIASR, gpio->vg_port_index);
val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0;
if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x08)
if (via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0x04)
val = via_read_reg(adap_data->io_port, adap_data->ioport_index) & 0xF0;