dmaengine: at_xdmac: restore the content of grws register

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In case the system suspends to a deep sleep state where power to DMA
controller is cut-off we need to restore the content of GRWS register.
This is a write only register and writing bit X tells the controller
to suspend read and write requests for channel X. Thus set GRWS before
restoring the content of GE (Global Enable) regiter.

Fixes: e1f7c9eee7 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver")
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Link: https://lore.kernel.org/r/20230214151827.1050280-5-claudiu.beznea@microchip.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Claudiu Beznea 2023-02-14 17:18:24 +02:00 • committed by Vinod Koul

parent 44fe8440bd

commit 7c5eb63d16

1 changed files with 9 additions and 0 deletions

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drivers/dma/at_xdmac.c

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