diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/spi/spi-atmel.c | 38 |
1 files changed, 16 insertions, 22 deletions
diff --git a/drivers/spi/spi-atmel.c b/drivers/spi/spi-atmel.c index f872cf196c2f..9e300a932699 100644 --- a/drivers/spi/spi-atmel.c +++ b/drivers/spi/spi-atmel.c @@ -433,26 +433,25 @@ static bool atmel_spi_can_dma(struct spi_master *master, } -static int atmel_spi_dma_slave_config(struct atmel_spi *as, - struct dma_slave_config *slave_config, - u8 bits_per_word) +static int atmel_spi_dma_slave_config(struct atmel_spi *as, u8 bits_per_word) { struct spi_master *master = platform_get_drvdata(as->pdev); + struct dma_slave_config slave_config; int err = 0; if (bits_per_word > 8) { - slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; - slave_config->src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; + slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; + slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; } else { - slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; - slave_config->src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + slave_config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; + slave_config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; } - slave_config->dst_addr = (dma_addr_t)as->phybase + SPI_TDR; - slave_config->src_addr = (dma_addr_t)as->phybase + SPI_RDR; - slave_config->src_maxburst = 1; - slave_config->dst_maxburst = 1; - slave_config->device_fc = false; + slave_config.dst_addr = (dma_addr_t)as->phybase + SPI_TDR; + slave_config.src_addr = (dma_addr_t)as->phybase + SPI_RDR; + slave_config.src_maxburst = 1; + slave_config.dst_maxburst = 1; + slave_config.device_fc = false; /* * This driver uses fixed peripheral select mode (PS bit set to '0' in @@ -464,12 +463,11 @@ static int atmel_spi_dma_slave_config(struct atmel_spi *as, * However, the first data has to be written into the lowest 16 bits and * the second data into the highest 16 bits of the Transmit * Data Register. For 8bit data (the most frequent case), it would - * require to rework tx_buf so each data would actualy fit 16 bits. + * require to rework tx_buf so each data would actually fit 16 bits. * So we'd rather write only one data at the time. Hence the transmit * path works the same whether FIFOs are available (and enabled) or not. */ - slave_config->direction = DMA_MEM_TO_DEV; - if (dmaengine_slave_config(master->dma_tx, slave_config)) { + if (dmaengine_slave_config(master->dma_tx, &slave_config)) { dev_err(&as->pdev->dev, "failed to configure tx dma channel\n"); err = -EINVAL; @@ -483,8 +481,7 @@ static int atmel_spi_dma_slave_config(struct atmel_spi *as, * So the receive path works the same whether FIFOs are available (and * enabled) or not. */ - slave_config->direction = DMA_DEV_TO_MEM; - if (dmaengine_slave_config(master->dma_rx, slave_config)) { + if (dmaengine_slave_config(master->dma_rx, &slave_config)) { dev_err(&as->pdev->dev, "failed to configure rx dma channel\n"); err = -EINVAL; @@ -496,7 +493,6 @@ static int atmel_spi_dma_slave_config(struct atmel_spi *as, static int atmel_spi_configure_dma(struct spi_master *master, struct atmel_spi *as) { - struct dma_slave_config slave_config; struct device *dev = &as->pdev->dev; int err; @@ -518,7 +514,7 @@ static int atmel_spi_configure_dma(struct spi_master *master, goto error; } - err = atmel_spi_dma_slave_config(as, &slave_config, 8); + err = atmel_spi_dma_slave_config(as, 8); if (err) goto error; @@ -700,7 +696,6 @@ static int atmel_spi_next_xfer_dma_submit(struct spi_master *master, struct dma_chan *txchan = master->dma_tx; struct dma_async_tx_descriptor *rxdesc; struct dma_async_tx_descriptor *txdesc; - struct dma_slave_config slave_config; dma_cookie_t cookie; dev_vdbg(master->dev.parent, "atmel_spi_next_xfer_dma_submit\n"); @@ -712,8 +707,7 @@ static int atmel_spi_next_xfer_dma_submit(struct spi_master *master, *plen = xfer->len; - if (atmel_spi_dma_slave_config(as, &slave_config, - xfer->bits_per_word)) + if (atmel_spi_dma_slave_config(as, xfer->bits_per_word)) goto err_exit; /* Send both scatterlists */ |