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| author | Serge Semin <Sergey.Semin@baikalelectronics.ru> | 2020-09-20 14:23:19 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-09-29 16:37:12 +0100 |
| commit | b86fed121fe6bf5bcac1c258472791ca352f47cf (patch) | |
| tree | 61002c6db9b1951e1e25ced6e23a1bcf97f23c08 /drivers | |
| parent | 7a4d61f1dc94871154b2d06d671a5c20aea16ff2 (diff) | |
| download | linux-stable-b86fed121fe6bf5bcac1c258472791ca352f47cf.tar.gz linux-stable-b86fed121fe6bf5bcac1c258472791ca352f47cf.tar.bz2 linux-stable-b86fed121fe6bf5bcac1c258472791ca352f47cf.zip | |
spi: dw-dma: Detach DMA transfer into a dedicated method
In order to add an alternative method of DMA-based SPI transfer first we
need to detach the currently available one from the common code. Here we
move the normal DMA-based SPI transfer execution functionality into a
dedicated method. It will be utilized if either the DMA engine supports
an unlimited number SG entries or Tx-only SPI transfer is requested. But
currently just use it for any SPI transfer.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Link: https://lore.kernel.org/r/20200920112322.24585-9-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/spi/spi-dw-dma.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/spi/spi-dw-dma.c b/drivers/spi/spi-dw-dma.c index 9f70818acce6..f2baefcae9ae 100644 --- a/drivers/spi/spi-dw-dma.c +++ b/drivers/spi/spi-dw-dma.c @@ -441,7 +441,8 @@ static int dw_spi_dma_setup(struct dw_spi *dws, struct spi_transfer *xfer) return 0; } -static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer) +static int dw_spi_dma_transfer_all(struct dw_spi *dws, + struct spi_transfer *xfer) { int ret; @@ -462,7 +463,14 @@ static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer) dma_async_issue_pending(dws->txchan); - ret = dw_spi_dma_wait(dws, xfer); + return dw_spi_dma_wait(dws, xfer); +} + +static int dw_spi_dma_transfer(struct dw_spi *dws, struct spi_transfer *xfer) +{ + int ret; + + ret = dw_spi_dma_transfer_all(dws, xfer); if (ret) return ret; |