diff options
Diffstat (limited to 'drivers/spi/spi-fsl-dspi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index b92c2b84a94b..a8077d4903c7 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -245,6 +245,10 @@ struct fsl_dspi { struct fsl_dspi_dma *dma; }; +/* + * Pop one word from the TX buffer for pushing into the + * PUSHR register (TX FIFO) + */ static u32 dspi_pop_tx(struct fsl_dspi *dspi) { u32 txdata = 0; @@ -257,6 +261,7 @@ static u32 dspi_pop_tx(struct fsl_dspi *dspi) return txdata; } +/* Prepare one TX FIFO entry (txdata plus cmd) */ static u32 dspi_pop_tx_pushr(struct fsl_dspi *dspi) { u16 cmd = dspi->tx_cmd, data = dspi_pop_tx(dspi); @@ -269,6 +274,7 @@ static u32 dspi_pop_tx_pushr(struct fsl_dspi *dspi) return cmd << 16 | data; } +/* Push one word to the RX buffer from the POPR register (RX FIFO) */ static void dspi_push_rx(struct fsl_dspi *dspi, u32 rxdata) { if (!dspi->rx) |