dmaengine: at_hdmac: improve power management routines

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Save/restore dma controller state across a suspend-resume sequence.
The prepare() function will wait for the non-cyclic channels to become idle.
It also deals with cyclic operations with the start at next period while
resuming.

Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

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Nicolas Ferre 2011-07-27 12:21:29 +00:00 • committed by Vinod Koul

parent d8cb04b070

commit c0ba594737

2 changed files with 94 additions and 1 deletions

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88

drivers/dma/at_hdmac.c

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7

drivers/dma/at_hdmac_regs.h

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