spi: imx: add fallback feature

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Add fallback pio feature in case  dma transfer failed before start.
Besides, another whole pio transfer including setup_transfer will be
issued by spi core, no need to restore jobs like commit bcd8e7761e ("spi:
imx: fallback to PIO if dma setup failure").

Signed-off-by: Robin Gong <yibin.gong@nxp.com>
Link: https://lore.kernel.org/r/1592347329-28363-3-git-send-email-yibin.gong@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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Robin Gong 2020-06-17 06:42:09 +08:00 • committed by Mark Brown

parent 809b1b04df

commit 7a908832ac

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1 changed files with 14 additions and 21 deletions

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drivers/spi/spi-imx.c

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