xiic_rx_space
__func__, bytes_in_fifo, xiic_rx_space(i2c),
if (bytes_in_fifo > xiic_rx_space(i2c))
bytes_in_fifo = xiic_rx_space(i2c);
bytes_rem = xiic_rx_space(i2c) - bytes_in_fifo;
bytes = min_t(u8, xiic_rx_space(i2c), IIC_RX_FIFO_DEPTH);
if (xiic_rx_space(i2c) == 0) {
while (xiic_rx_space(i2c)) {