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Commit b6d1a17f authored by Robert Jarzmik's avatar Robert Jarzmik
Browse files

dmaengine: pxa: document pxad_param 



Add some documentation for the pxad_param structure, and describe the
contract behind the minimal required priority of a DMA channel.

Signed-off-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
Acked-by: default avatarVinod Koul <vkoul@kernel.org>
parent 273340e8

include/linux/dma/pxa-dma.h

+9 −0
Original line number Diff line number Diff line
@@ -9,6 +9,15 @@ enum pxad_chan_prio { 
	PXAD_PRIO_LOWEST,

};



/**

 * struct pxad_param - dma channel request parameters

 * @drcmr: requestor line number

 * @prio: minimal mandatory priority of the channel

 *

 * If a requested channel is granted, its priority will be at least @prio,

 * ie. if PXAD_PRIO_LOW is required, the requested channel will be either

 * PXAD_PRIO_LOW, PXAD_PRIO_NORMAL or PXAD_PRIO_HIGHEST.

 */

struct pxad_param {

	unsigned int drcmr;

	enum pxad_chan_prio prio;