cs84xx_read_gpio
static uint8 cs84xx_read_gpio(ice1712 *ice, uint8 reg_addr,
val = cs84xx_read_gpio(ice, reg_addr, AP2496_SPDIF_CS, 0);
val = cs84xx_read_gpio(ice, reg_addr, DELTA1010LT_SPDIF_CS,
val = cs84xx_read_gpio(ice, reg_addr, VX442_SPDIF_CS, 0);