diff options
| author |   Tomasz Figa <tomasz.figa@gmail.com> | 2013-08-11 02:33:30 +0200 |
|---|---|---|
| committer |   Mark Brown <broonie@linaro.org> | 2013-08-11 14:06:30 +0100 |
| commit | 90438c4bf987a653ad8679a4fa25a909f0c642b5 (patch) | |
| tree | 952bebf17e27d9a05b113f509c82cc372669b762 /drivers/spi/spi-s3c64xx.c | |
| parent | spi: s3c64xx: Do not request CS GPIO on subsequent calls to .setup() (diff) | |
| download | linux-dev-90438c4bf987a653ad8679a4fa25a909f0c642b5.tar.xz linux-dev-90438c4bf987a653ad8679a4fa25a909f0c642b5.zip | |
spi: s3c64xx: Use dmaengine_prep_slave_single() to prepare DMA transfers
Since the driver supports only contiguous buffers, there is no need to
manually construct a scatterlist with just a single entry, when there is
a dedicated helper for this purpose.
This patch modifies prepare_dma() function to use available helper instead
of manually creating a scatterlist.
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Diffstat (limited to 'drivers/spi/spi-s3c64xx.c')
| -rw-r--r-- | drivers/spi/spi-s3c64xx.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index 2330dceb27cc..a7a739c89488 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -389,7 +389,6 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma, { struct s3c64xx_spi_driver_data *sdd; struct dma_slave_config config; - struct scatterlist sg; struct dma_async_tx_descriptor *desc; memset(&config, 0, sizeof(config)); @@ -412,14 +411,8 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma, dmaengine_slave_config(dma->ch, &config); } - sg_init_table(&sg, 1); - sg_dma_len(&sg) = len; - sg_set_page(&sg, pfn_to_page(PFN_DOWN(buf)), - len, offset_in_page(buf)); - sg_dma_address(&sg) = buf; - - desc = dmaengine_prep_slave_sg(dma->ch, - &sg, 1, dma->direction, DMA_PREP_INTERRUPT); + desc = dmaengine_prep_slave_single(dma->ch, buf, len, + dma->direction, DMA_PREP_INTERRUPT); desc->callback = s3c64xx_spi_dmacb; desc->callback_param = dma; |