i2c_port_discover_step
while ((iret = i2c_port_discover_step(iter, &disc)) == I2C_ITER_VALID) {
extern i2c_iter_t i2c_port_discover_step(i2c_port_iter_t *,
i2c_iter_t iret = i2c_port_discover_step(iter->di_iter,
while ((ret = i2c_port_discover_step(iter, &disc)) == I2C_ITER_VALID) {