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    Subject[PATCH 3/7] dt-bindings: sdhci-omap: Add example for using external dma
    Date
    From: Chunyan Zhang <zhang.chunyan@linaro.org>

    sdhci-omap can support both external dma controller via dmaengine
    framework as well as ADMA which standard SD host controller
    provides.

    Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>
    Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
    ---
    Documentation/devicetree/bindings/mmc/sdhci-omap.txt | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/Documentation/devicetree/bindings/mmc/sdhci-omap.txt b/Documentation/devicetree/bindings/mmc/sdhci-omap.txt
    index 72c4dec7e1db..f8914a2a2aec 100644
    --- a/Documentation/devicetree/bindings/mmc/sdhci-omap.txt
    +++ b/Documentation/devicetree/bindings/mmc/sdhci-omap.txt
    @@ -14,6 +14,11 @@ Required properties:
    "ddr_1_8v-rev11", "ddr_1_8v" or "ddr_3_3v", "hs200_1_8v-rev11",
    "hs200_1_8v",
    - pinctrl-<n> : Pinctrl states as described in bindings/pinctrl/pinctrl-bindings.txt
    +- dmas: List of DMA specifiers with the controller specific format as described
    + in the generic DMA client binding. A tx and rx specifier is required.
    +- dma-names: List of DMA request names. These strings correspond 1:1 with the
    + DMA specifiers listed in dmas. The string naming is to be "rx"
    + and "tx" for RX and TX DMA requests, respectively.

    Example:
    mmc1: mmc@4809c000 {
    @@ -22,4 +27,6 @@ Example:
    ti,hwmods = "mmc1";
    bus-width = <4>;
    vmmc-supply = <&vmmc>; /* phandle to regulator node */
    + dmas = <&sdma 61 &sdma 62>;
    + dma-names = "tx", "rx";
    };
    --
    2.19.2
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