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authorGeert Uytterhoeven <geert+renesas@glider.be>2014-06-02 15:38:14 +0200
committerMark Brown <broonie@linaro.org>2014-06-02 15:49:35 +0100
commite4b52dc4625ee739195189d40c6ddc7d55ddf312 (patch)
treed7ce366d319b52d089eacc8fc367bb087813d025 /drivers/spi/spi-rspi.c
parent8393fa787bf63c05cb6f9cf0a58ba1ea213c3f01 (diff)
downloadop-kernel-dev-e4b52dc4625ee739195189d40c6ddc7d55ddf312.zip
op-kernel-dev-e4b52dc4625ee739195189d40c6ddc7d55ddf312.tar.gz
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/spi-rspi.c')
-rw-r--r--drivers/spi/spi-rspi.c22
1 files changed, 12 insertions, 10 deletions
diff --git a/drivers/spi/spi-rspi.c b/drivers/spi/spi-rspi.c
index 3dea8ad..bfa5e7e 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);
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