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| author | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2015-03-09 17:48:45 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-03-09 21:11:13 +0300 |
| commit | e31abce778bc05b94d406e8cbebd9953d12e84b8 (patch) | |
| tree | a91c08786ebba08a6f443a2e731f09311a8aa8c1 /drivers/spi/spi-dw-mid.c | |
| parent | 0365fbd4bbc0b8f3fd3c78c16a8020ea83b3afcf (diff) | |
| download | linux-e31abce778bc05b94d406e8cbebd9953d12e84b8.tar.xz | |
spi: dw-mid: convert value of dma_width to enum dma_slave_buswidth
DMAEngine has a specific type to be used for bus width. This patch converts the
code to use the values of the specific type when configure DMA transfer.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-dw-mid.c')
| -rw-r--r-- | drivers/spi/spi-dw-mid.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/spi/spi-dw-mid.c b/drivers/spi/spi-dw-mid.c index c8416ef01f9a..25c8fa7d073f 100644 --- a/drivers/spi/spi-dw-mid.c +++ b/drivers/spi/spi-dw-mid.c @@ -100,6 +100,15 @@ static void mid_spi_dma_exit(struct dw_spi *dws) dma_release_channel(dws->rxchan); } +static enum dma_slave_buswidth convert_dma_width(u32 dma_width) { + if (dma_width == 1) + return DMA_SLAVE_BUSWIDTH_1_BYTE; + else if (dma_width == 2) + return DMA_SLAVE_BUSWIDTH_2_BYTES; + + return DMA_SLAVE_BUSWIDTH_UNDEFINED; +} + /* * dws->dma_chan_busy is set before the dma transfer starts, callback for tx * channel will clear a corresponding bit. @@ -126,7 +135,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_tx(struct dw_spi *dws) txconf.dst_addr = dws->dma_addr; txconf.dst_maxburst = LNW_DMA_MSIZE_16; txconf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - txconf.dst_addr_width = dws->dma_width; + txconf.dst_addr_width = convert_dma_width(dws->dma_width); txconf.device_fc = false; dmaengine_slave_config(dws->txchan, &txconf); @@ -175,7 +184,7 @@ static struct dma_async_tx_descriptor *dw_spi_dma_prepare_rx(struct dw_spi *dws) rxconf.src_addr = dws->dma_addr; rxconf.src_maxburst = LNW_DMA_MSIZE_16; rxconf.dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; - rxconf.src_addr_width = dws->dma_width; + rxconf.src_addr_width = convert_dma_width(dws->dma_width); rxconf.device_fc = false; dmaengine_slave_config(dws->rxchan, &rxconf); |