gpio_read
ret = st->ops->gpio_read(st, &val);
int (*gpio_read)(struct ad5592r_state *st, u8 *value);
.gpio_read = ad5592r_gpio_read,
.gpio_read = ad5593r_gpio_read,
if (gpio_read() & 0x4000) {
data = gpio_read();
val = gpio_read();
gpio = gpio_read();
gpio = gpio_read();
val = gpio_read();
bttv_tda9880_setnorm(btv, gpio_read());
btv->state.gpio_data = gpio_read();
*data = gpio_read();
gpio_read(dev, HPI_ADDR_INTR_STATUS, &status_reg);
gpio_read(dev, HPI_ADDR_INTR_RET_VALUE, &go->interrupt_value);
gpio_read(dev, HPI_ADDR_INTR_RET_DATA, &go->interrupt_data);
gpio_read(dev, HPI_ADDR_INTR_STATUS, &status_reg);