From bf9af08cd5151f1915119ea4c6a873d5a4880d74 Mon Sep 17 00:00:00 2001 From: Anton Bondarenko Date: Tue, 8 Dec 2015 07:43:46 +0100 Subject: [PATCH] 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 Signed-off-by: Mark Brown --- drivers/spi/spi-imx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spi-imx.c b/drivers/spi/spi-imx.c index c12306099d24..d98c33cb64f9 100644 --- a/drivers/spi/spi-imx.c +++ b/drivers/spi/spi-imx.c @@ -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); -- 2.20.1