imx1_write_bit
imx1_write_bit(ipctl, pin_id, gpio_in_use, MX1_GIUS);
imx1_write_bit(ipctl, pin_id, direction, MX1_DDIR);
imx1_write_bit(ipctl, pin_id, afunction, MX1_GPR);
imx1_write_bit(ipctl, pin_id, configs[i] & 0x01, MX1_PUEN);