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    dmaengine: add helper function to request a slave DMA channel · 9a6cecc8
    Jon Hunter 提交于
    Currently slave DMA channels are requested by calling dma_request_channel()
    and requires DMA clients to pass various filter parameters to obtain the
    appropriate channel.
    
    With device-tree being used by architectures such as arm and the addition of
    device-tree helper functions to extract the relevant DMA client information
    from device-tree, add a new function to request a slave DMA channel using
    device-tree. This function is currently a simple wrapper that calls the
    device-tree of_dma_request_slave_channel() function.
    
    Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
    Cc: Benoit Cousson <b-cousson@ti.com>
    Cc: Stephen Warren <swarren@nvidia.com>
    Cc: Grant Likely <grant.likely@secretlab.ca>
    Cc: Russell King <linux@arm.linux.org.uk>
    Cc: Rob Herring <rob.herring@calxeda.com>
    Cc: Arnd Bergmann <arnd@arndb.de>
    Cc: Vinod Koul <vinod.koul@intel.com>
    Cc: Dan Williams <djbw@fb.com>
    Acked-by: NArnd Bergmann <arnd@arndb.de>
    Signed-off-by: NJon Hunter <jon-hunter@ti.com>
    Reviewed-by: NStephen Warren <swarren@wwwdotorg.org>
    Acked-by: NRob Herring <rob.herring@calxeda.com>
    Signed-off-by: NVinod Koul <vinod.koul@linux.intel.com>
    9a6cecc8
dmaengine.h 33.4 KB