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SubjectRe: [PATCH V3 1/3] mmc: sdhci: add support for using external DMA devices
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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@linaro.org>
>> ---
>> 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

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