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authorAndy Shevchenko <andriy.shevchenko@linux.intel.com>2015-03-09 15:48:45 +0100
committerMark Brown <broonie@kernel.org>2015-03-09 19:11:13 +0100
commite31abce778bc05b94d406e8cbebd9953d12e84b8 (patch)
treea91c08786ebba08a6f443a2e731f09311a8aa8c1 /drivers/spi/spi-dw-mid.c
parentMerge branch 'fix/dw' of git://git.kernel.org/pub/scm/linux/kernel/git/brooni... (diff)
downloadlinux-e31abce778bc05b94d406e8cbebd9953d12e84b8.tar.xz
linux-e31abce778bc05b94d406e8cbebd9953d12e84b8.zip
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.c13
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);