diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/exynos_spi.c | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/drivers/spi/exynos_spi.c b/drivers/spi/exynos_spi.c index d7fdaac..7407d6c 100644 --- a/drivers/spi/exynos_spi.c +++ b/drivers/spi/exynos_spi.c @@ -247,24 +247,27 @@ static int spi_rx_tx(struct exynos_spi_slave *spi_slave, int todo, /* Keep the fifos full/empty. */ spi_get_fifo_levels(regs, &rx_lvl, &tx_lvl); - if (tx_lvl < spi_slave->fifo_size && out_bytes) { + while (tx_lvl < spi_slave->fifo_size/2 && out_bytes) { temp = txp ? *txp++ : 0xff; writel(temp, ®s->tx_data); out_bytes--; + tx_lvl++; } if (rx_lvl > 0) { - temp = readl(®s->rx_data); - if (spi_slave->skip_preamble) { - if (temp == SPI_PREAMBLE_END_BYTE) { - spi_slave->skip_preamble = 0; - stopping = 0; + while (rx_lvl > 0) { + temp = readl(®s->rx_data); + if (spi_slave->skip_preamble) { + if (temp == SPI_PREAMBLE_END_BYTE) { + spi_slave->skip_preamble = 0; + stopping = 0; + } + } else { + if (rxp || stopping) + *rxp++ = temp; + in_bytes--; } - } else { - if (rxp || stopping) - *rxp++ = temp; - in_bytes--; - } - toread--; + toread--; + rx_lvl--; } else if (!toread) { /* * We have run out of input data, but haven't read |