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    SubjectRe: [PATCH v3 2/2] DMAEngine: Add DMAEngine driver based on old MSM DMA APIs
    On Wed, Mar 14, 2012 at 4:05 PM, Daniel Walker <> wrote:
    > On Tue, Mar 13, 2012 at 06:16:39PM +0530, Ravi Kumar V wrote:
    >> There is a MSM DMA driver in arch/arm/mach-msm/ which is not in
    >> dmaengine framework standards, but that driver is been used by
    >> client drivers nand, eMMC and serial drivers. Now if we implement
    >> the whole dma driver using dmaengine framework then nand, eMMC like
    >> drivers will be failed as they are using old dma driver API's, so
    >> instead of implementing new driver from scratch we are keeping the
    >> old dma API's as it is and using those API's in new dmaengine
    >> framework.So that we can convert clients drivers to use dma engine
    >> framework.
    > Did you investigate converting the drivers (nand, eMMC, serial) ? It
    > seems like there would be a 1:1 mapping between the API's , so it might
    > only be a find->replace operation.

    The eMMC i.e. drivers/mmc/host/msm_sdcc.c should preferably
    not be converted, instead switch the platforms over to using
    drivers/mmc/host/mmci.c which is already very well enabled for
    DMA engine.

    Augment it with Qualcomm silicon differences as needed, I do
    not think they will be major.

    Linus Walleij

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      Last update: 2012-08-14 13:42    [W:0.023 / U:19.692 seconds]
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