diff options
| author | Geert Uytterhoeven <geert+renesas@glider.be> | 2014-06-02 15:38:14 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-06-02 16:49:35 +0200 |
| commit | e4b52dc4625ee739195189d40c6ddc7d55ddf312 (patch) | |
| tree | d7ce366d319b52d089eacc8fc367bb087813d025 /drivers/spi | |
| parent | spi: rspi: Move RSPI-specific setup out of DMA routines (diff) | |
| download | linux-e4b52dc4625ee739195189d40c6ddc7d55ddf312.tar.xz linux-e4b52dc4625ee739195189d40c6ddc7d55ddf312.zip | |
spi: rspi: Pass sg_tables instead of spi_tranfer to rspi_*_dma()
The DMA routines only need access to the scatter-gather tables inside the
spi_transfer structures, hence just pass those.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-rspi.c | 22 |
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c index 3dea8adfdcf3..bfa5e7e5df5a 100644 --- a/drivers/spi/spi-rspi.c +++ b/drivers/spi/spi-rspi.c @@ -463,13 +463,13 @@ static void rspi_dma_complete(void *arg) wake_up_interruptible(&rspi->wait); } -static int rspi_send_dma(struct rspi_data *rspi, struct spi_transfer *t) +static int rspi_send_dma(struct rspi_data *rspi, struct sg_table *tx) { struct dma_async_tx_descriptor *desc; int ret; - desc = dmaengine_prep_slave_sg(rspi->master->dma_tx, t->tx_sg.sgl, - t->tx_sg.nents, DMA_TO_DEVICE, + desc = dmaengine_prep_slave_sg(rspi->master->dma_tx, tx->sgl, + tx->nents, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc) return -EIO; @@ -530,21 +530,22 @@ static void qspi_receive_init(const struct rspi_data *rspi) rspi_write8(rspi, 0, QSPI_SPBFCR); } -static int rspi_send_receive_dma(struct rspi_data *rspi, struct spi_transfer *t) +static int rspi_send_receive_dma(struct rspi_data *rspi, struct sg_table *tx, + struct sg_table *rx) { struct dma_async_tx_descriptor *desc_tx, *desc_rx; int ret; /* prepare transmit transfer */ - desc_tx = dmaengine_prep_slave_sg(rspi->master->dma_tx, t->tx_sg.sgl, - t->tx_sg.nents, DMA_TO_DEVICE, + desc_tx = dmaengine_prep_slave_sg(rspi->master->dma_tx, tx->sgl, + tx->nents, DMA_TO_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc_tx) return -EIO; /* prepare receive transfer */ - desc_rx = dmaengine_prep_slave_sg(rspi->master->dma_rx, t->rx_sg.sgl, - t->rx_sg.nents, DMA_FROM_DEVICE, + desc_rx = dmaengine_prep_slave_sg(rspi->master->dma_rx, rx->sgl, + rx->nents, DMA_FROM_DEVICE, DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!desc_rx) return -EIO; @@ -616,9 +617,10 @@ static int rspi_transfer_one(struct spi_master *master, struct spi_device *spi, if (master->can_dma && __rspi_can_dma(rspi, xfer)) { if (xfer->rx_buf) - return rspi_send_receive_dma(rspi, xfer); + return rspi_send_receive_dma(rspi, &xfer->tx_sg, + &xfer->rx_sg); else - return rspi_send_dma(rspi, xfer); + return rspi_send_dma(rspi, &xfer->tx_sg); } ret = rspi_pio_transfer(rspi, xfer->tx_buf, xfer->rx_buf, xfer->len); |