This series begins the conversion of the DaVinci private EDMA API implementation to a DMA engine driver and converts two of the three in-kernel users of the private EDMA API to DMA engine. The approach taken is similar to the recent OMAP DMA Engine conversion. The EDMA DMA Engine driver is a wrapper around the existing private EDMA implementation and registers the platform device within the driver. This allows the conversion series to stand alone with just the drivers and no changes to platform code. It also allows peripheral drivers to continue to use the private EDMA implementation until they are converted. The EDMA DMA Engine driver supports slave transfers only at this time. It is planned to add cyclic transfers in support of audio peripherals. There are three users of the private EDMA API in the kernel now: davinci_mmc, spi-davinci, and davinci-mcasp. This series provides DMA Engine conversions for the davinci_mmc and spi-davinci drivers which use the supported slave transfers. This series has been tested on an AM18x EVM and performance is comparable with the private EDMA API implementations. I do not have a Wifi module for the AM18x EVM to test the MMC1 instance which has DMA channels on the second EDMA channel controller instance. Testing is needed on all DaVinci platforms including DM355/365, DM644x/6x, DA830/OMAP-L137/AM17x, and DA850/OMAP-L138/AM18x. After this series, the current plan is to complete the mcasp driver conversion which includes adding cyclic dma support. This will then enable the removal and refactoring of the private EDMA API functionality into the EDMA DMA Engine driver. Since EDMA is also used on the AM33xx family of parts in mach-omap2/, the plan is to enable this driver on that platform as well. Matt Porter (3): dmaengine: add TI EDMA DMA engine driver mmc: davinci_mmc: convert to DMA engine API spi: spi-davinci: convert to DMA engine API drivers/dma/Kconfig | 9 + drivers/dma/Makefile | 1 + drivers/dma/edma.c | 729 ++++++++++++++++++++++++++++++++++++++++ drivers/mmc/host/davinci_mmc.c | 271 +++++---------- drivers/spi/spi-davinci.c | 292 +++++++--------- include/linux/edma.h | 29 ++ 6 files changed, 980 insertions(+), 351 deletions(-) create mode 100644 drivers/dma/edma.c create mode 100644 include/linux/edma.h -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
