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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2014-10-02 16:31:09 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2014-10-02 17:06:26 +0100 |
| commit | f7477c2be8689ee8355db345f107744c9bd7f112 (patch) | |
| tree | de5e0e2142413e2b399159134aea7f4a06eb52f1 /drivers/spi | |
| parent | 2a285299446cccbaf9ba47403e8f2ce578cd1ad1 (diff) | |
| download | op-kernel-dev-f7477c2be8689ee8355db345f107744c9bd7f112.zip op-kernel-dev-f7477c2be8689ee8355db345f107744c9bd7f112.tar.gz | |
spi: dw-mid: follow new DMAengine workflow
Though intel-mid-dma does not follow a new DMA workflow (*) let's prepare SPI
DW driver for that.
(*) The client is obliged to call dma_async_issue_pending() which starts the
actual transfers. Old DMA drivers do not follow this, since requirement was
introduced in the discussion of [1].
[1] http://www.spinics.net/lists/arm-kernel/msg125987.html
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-dw-mid.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index a507add..46c6d58 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -150,7 +150,7 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change) &dws->tx_sgl, 1, DMA_MEM_TO_DEV, - DMA_PREP_INTERRUPT); + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); txdesc->callback = dw_spi_dma_done; txdesc->callback_param = dws; @@ -172,13 +172,17 @@ static int mid_spi_dma_transfer(struct dw_spi *dws, int cs_change) &dws->rx_sgl, 1, DMA_DEV_TO_MEM, - DMA_PREP_INTERRUPT); + DMA_PREP_INTERRUPT | DMA_CTRL_ACK); rxdesc->callback = dw_spi_dma_done; rxdesc->callback_param = dws; /* rx must be started before tx due to spi instinct */ dmaengine_submit(rxdesc); + dma_async_issue_pending(dws->rxchan); + dmaengine_submit(txdesc); + dma_async_issue_pending(dws->txchan); + return 0; } |
