diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/spi-fsl-dspi.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index bec758e978fb..2c0f211eed87 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -1006,6 +1006,25 @@ static void dspi_init(struct fsl_dspi *dspi) SPI_CTARE_FMSZE(0) | SPI_CTARE_DTCP(1)); } +static int dspi_slave_abort(struct spi_master *master) +{ + struct fsl_dspi *dspi = spi_master_get_devdata(master); + + /* + * Terminate all pending DMA transactions for the SPI working + * in SLAVE mode. + */ + dmaengine_terminate_sync(dspi->dma->chan_rx); + dmaengine_terminate_sync(dspi->dma->chan_tx); + + /* Clear the internal DSPI RX and TX FIFO buffers */ + regmap_update_bits(dspi->regmap, SPI_MCR, + SPI_MCR_CLR_TXF | SPI_MCR_CLR_RXF, + SPI_MCR_CLR_TXF | SPI_MCR_CLR_RXF); + + return 0; +} + static int dspi_probe(struct platform_device *pdev) { struct device_node *np = pdev->dev.of_node; @@ -1030,6 +1049,7 @@ static int dspi_probe(struct platform_device *pdev) ctlr->dev.of_node = pdev->dev.of_node; ctlr->cleanup = dspi_cleanup; + ctlr->slave_abort = dspi_slave_abort; ctlr->mode_bits = SPI_CPOL | SPI_CPHA | SPI_LSB_FIRST; pdata = dev_get_platdata(&pdev->dev); |