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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>
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1 changed files with 4 additions and 0 deletions
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@ -389,6 +389,7 @@ static int davinci_spi_of_setup(struct spi_device *spi)
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{
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struct davinci_spi_config *spicfg = spi->controller_data;
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struct device_node *np = spi->dev.of_node;
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struct davinci_spi *dspi = spi_master_get_devdata(spi->master);
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u32 prop;
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if (spicfg == NULL && np) {
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@ -400,6 +401,9 @@ static int davinci_spi_of_setup(struct spi_device *spi)
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if (!of_property_read_u32(np, "ti,spi-wdelay", &prop))
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spicfg->wdelay = (u8)prop;
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spi->controller_data = spicfg;
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if (dspi->dma_rx && dspi->dma_tx)
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spicfg->io_type = SPI_IO_TYPE_DMA;
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}
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return 0;
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