Commit 3e2e1258 authored Feb 23, 2017 by Fabien Parent Committed by Mark Brown Mar 07, 2017

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>

parent 8aedbf58

drivers/spi/spi-davinci.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;