Hi Chunyan, On 29/11/18 2:53 PM, Adrian Hunter wrote: > On 29/11/18 8:07 AM, Chunyan Zhang wrote: >> Some standard SD host controllers can support both external dma >> controllers as well as ADMA/SDMA in which the SD host controller >> acts as DMA master. TI's omap controller is the case as an example. >> >> Currently the generic SDHCI code supports ADMA/SDMA integrated in >> the host controller but does not have any support for external DMA >> controllers implemented using dmaengine, meaning that custom code is >> needed for any systems that use an external DMA controller with SDHCI. >> >> Signed-off-by: Chunyan Zhang <zhang.chunyan@xxxxxxxxxx> >> --- >> drivers/mmc/host/Kconfig | 14 ++++ >> drivers/mmc/host/sdhci.c | 185 ++++++++++++++++++++++++++++++++++++++++++++++- >> drivers/mmc/host/sdhci.h | 8 ++ >> 3 files changed, 206 insertions(+), 1 deletion(-) >> >> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig >> index 1b58739..4183f43 100644 >> --- a/drivers/mmc/host/Kconfig >> +++ b/drivers/mmc/host/Kconfig >> @@ -969,6 +969,7 @@ config MMC_SDHCI_XENON >> config MMC_SDHCI_OMAP >> tristate "TI SDHCI Controller Support">> depends on MMC_SDHCI_PLTFM && OF >> + select MMC_SDHCI_EXTERNAL_DMA if DMA_ENGINE This should be in patch 2. Thanks, Faiz
