Commit bf9af08c authored Dec 08, 2015 by Anton Bondarenko Committed by Mark Brown Dec 15, 2015

spi: imx: defer spi initialization, if DMA engine is



If SPI device supports DMA mode, but DMA controller is not yet
available due to e.g. a delay in the corresponding kernel module
initialization, retry to initialize SPI driver later on instead of
falling back into PIO only mode.

Signed-off-by: Anton Bondarenko <anton.bondarenko.sama@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

parent 3760047a

drivers/spi/spi-imx.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1222,6 +1222,9 @@ static int spi_imx_probe(struct platform_device *pdev)
		*/
		if (is_imx51_ecspi(spi_imx)) {
		ret = spi_imx_sdma_init(&pdev->dev, spi_imx, master, res);
		if (ret == -EPROBE_DEFER)
		goto out_clk_put;

		if (ret < 0)
		dev_err(&pdev->dev, "dma setup error %d, use pio\n",
		ret);