diff options
| -rw-r--r-- | drivers/spi/spi-dw-dma.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c index 935f073a3523..f333c2e23bf6 100644 --- a/drivers/spi/spi-dw-dma.c +++ b/drivers/spi/spi-dw-dma.c @@ -188,12 +188,12 @@ static enum dma_slave_buswidth dw_spi_dma_convert_width(u8 n_bytes) return DMA_SLAVE_BUSWIDTH_UNDEFINED; } -static int dw_spi_dma_wait(struct dw_spi *dws, struct spi_transfer *xfer) +static int dw_spi_dma_wait(struct dw_spi *dws, unsigned int len, u32 speed) { unsigned long long ms; - ms = xfer->len * MSEC_PER_SEC * BITS_PER_BYTE; - do_div(ms, xfer->effective_speed_hz); + ms = len * MSEC_PER_SEC * BITS_PER_BYTE; + do_div(ms, speed); ms += ms + 200; if (ms > UINT_MAX) @@ -268,17 +268,16 @@ static int dw_spi_dma_config_tx(struct dw_spi *dws) return dmaengine_slave_config(dws->txchan, &txconf); } -static int dw_spi_dma_submit_tx(struct dw_spi *dws, struct spi_transfer *xfer) +static int dw_spi_dma_submit_tx(struct dw_spi *dws, struct scatterlist *sgl, + unsigned int nents) { struct dma_async_tx_descriptor *txdesc; dma_cookie_t cookie; int ret; - txdesc = dmaengine_prep_slave_sg(dws->txchan, - xfer->tx_sg.sgl, - xfer->tx_sg.nents, - DMA_MEM_TO_DEV, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + txdesc = dmaengine_prep_slave_sg(dws->txchan, sgl, nents, + DMA_MEM_TO_DEV, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!txdesc) return -ENOMEM; @@ -370,17 +369,16 @@ static int dw_spi_dma_config_rx(struct dw_spi *dws) return dmaengine_slave_config(dws->rxchan, &rxconf); } -static int dw_spi_dma_submit_rx(struct dw_spi *dws, struct spi_transfer *xfer) +static int dw_spi_dma_submit_rx(struct dw_spi *dws, struct scatterlist *sgl, + unsigned int nents) { struct dma_async_tx_descriptor *rxdesc; dma_cookie_t cookie; int ret; - rxdesc = dmaengine_prep_slave_sg(dws->rxchan, - xfer->rx_sg.sgl, - xfer->rx_sg.nents, - DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT | DMA_CTRL_ACK); + rxdesc = dmaengine_prep_slave_sg(dws->rxchan, sgl, nents, + DMA_DEV_TO_MEM, + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); if (!rxdesc) return -ENOMEM; @@ -443,13 +441,14 @@ static int dw_spi_dma_transfer_all(struct dw_spi *dws, int ret; /* Submit the DMA Tx transfer */ - ret = dw_spi_dma_submit_tx(dws, xfer); + ret = dw_spi_dma_submit_tx(dws, xfer->tx_sg.sgl, xfer->tx_sg.nents); if (ret) goto err_clear_dmac; /* Submit the DMA Rx transfer if required */ if (xfer->rx_buf) { - ret = dw_spi_dma_submit_rx(dws, xfer); + ret = dw_spi_dma_submit_rx(dws, xfer->rx_sg.sgl, + xfer->rx_sg.nents); if (ret) goto err_clear_dmac; @@ -459,7 +458,7 @@ static int dw_spi_dma_transfer_all(struct dw_spi *dws, dma_async_issue_pending(dws->txchan); - ret = dw_spi_dma_wait(dws, xfer); + ret = dw_spi_dma_wait(dws, xfer->len, xfer->effective_speed_hz); err_clear_dmac: dw_writel(dws, DW_SPI_DMACR, 0); |