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spi: davinci: enable DMA when channels are defined in DT 

When booting with DT the SPI driver is always using
the SPI_IO_TYPE_INTR mode to transfer data even if DMA channels are
defined in the DT.

This commit changes the behaviour to select the SPI_IO_TYPE_DMA mode
if DMA channels are defined in the DT and will keep SPI_IO_TYPE_INTR
if the channels are not defined in it.

Signed-off-by: Fabien Parent <fparent@baylibre.com>
Signed-off-by: Frode Isaksen <fisaksen@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Fabien Parent 2017-02-23 19:01:57 +01:00 committed by Mark Brown
parent 8aedbf580d
commit 3e2e125844
1 changed files with 4 additions and 0 deletions
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4
drivers/spi/spi-davinci.c
View File

@ -389,6 +389,7 @@ static int davinci_spi_of_setup(struct spi_device *spi)
{
struct davinci_spi_config *spicfg = spi->controller_data;
struct device_node *np = spi->dev.of_node;
struct davinci_spi *dspi = spi_master_get_devdata(spi->master);
u32 prop;
if (spicfg == NULL && np) {
@ -400,6 +401,9 @@ static int davinci_spi_of_setup(struct spi_device *spi)
if (!of_property_read_u32(np, "ti,spi-wdelay", &prop))
spicfg->wdelay = (u8)prop;
spi->controller_data = spicfg;
if (dspi->dma_rx && dspi->dma_tx)
spicfg->io_type = SPI_IO_TYPE_DMA;
}
return 0;