diff options
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-geni-qcom.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/spi/spi-geni-qcom.c b/drivers/spi/spi-geni-qcom.c index 512e925d5ea4..096edfbde451 100644 --- a/drivers/spi/spi-geni-qcom.c +++ b/drivers/spi/spi-geni-qcom.c @@ -354,6 +354,12 @@ static bool geni_spi_handle_tx(struct spi_geni_master *mas) unsigned int bytes_per_fifo_word = geni_byte_per_fifo_word(mas); unsigned int i = 0; + /* Stop the watermark IRQ if nothing to send */ + if (!mas->cur_xfer) { + writel(0, se->base + SE_GENI_TX_WATERMARK_REG); + return false; + } + max_bytes = (mas->tx_fifo_depth - mas->tx_wm) * bytes_per_fifo_word; if (mas->tx_rem_bytes < max_bytes) max_bytes = mas->tx_rem_bytes; @@ -396,6 +402,14 @@ static void geni_spi_handle_rx(struct spi_geni_master *mas) if (rx_last_byte_valid && rx_last_byte_valid < 4) rx_bytes -= bytes_per_fifo_word - rx_last_byte_valid; } + + /* Clear out the FIFO and bail if nowhere to put it */ + if (!mas->cur_xfer) { + for (i = 0; i < DIV_ROUND_UP(rx_bytes, bytes_per_fifo_word); i++) + readl(se->base + SE_GENI_RX_FIFOn); + return; + } + if (mas->rx_rem_bytes < rx_bytes) rx_bytes = mas->rx_rem_bytes; |