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(parent: c48b178) | patch
spi: spi-omap2-mcspi: Support probe deferral for DMA channels
authorVignesh Raghavendra <vigneshr@ti.com>
Tue, 4 Feb 2020 12:48:16 +0000 (18:18 +0530)
committerMark Brown <broonie@kernel.org>
Thu, 6 Feb 2020 15:53:57 +0000 (15:53 +0000)
commit673330fd3ee6fe1ef0d2e9cbcb7d5154d354c9c8
tree3c2661a2487ca02142a7de0ed8abc9a73b58638dtree | snapshot
parentc48b178ba317104ce220e5884401019a1fb37a7fcommit | diff
spi: spi-omap2-mcspi: Support probe deferral for DMA channels

dma_request_channel() can return -EPROBE_DEFER, if DMA driver is not
ready. Currently driver just falls back to PIO mode on probe deferral.
Fix this by requesting all required channels during probe and
propagating EPROBE_DEFER error code.

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20200204124816.16735-3-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
drivers/spi/spi-omap2-mcspi.c diff | blob | history
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