• Franklin S Cooper Jr's avatar
    spi: omap2-mcspi: Use the SPI framework to handle DMA mapping · 0ba1870f
    Franklin S Cooper Jr authored
    Currently, the driver handles mapping buffers to be used by the DMA.
    However, there are times that the current mapping implementation will
    fail for certain buffers. Fortunately, the SPI framework can detect
    and map buffers so its usable by the DMA.
    Update the driver to utilize the SPI framework for buffer
    mapping instead. Also incorporate hooks that the framework uses to
    determine if the DMA can or can not be used.
    This will result in the original omap2_mcspi_transfer_one function being
    deleted and omap2_mcspi_work_one being renamed to
    omap2_mcspi_transfer_one. Previously transfer_one was only responsible
    for mapping and work_one handled the transfer. But now only transferring
    needs to be handled by the driver.
    Signed-off-by: default avatarFranklin S Cooper Jr <fcooper@ti.com>
    Signed-off-by: default avatarMark Brown <broonie@kernel.org>
spi-omap2-mcspi.c 38.3 KB