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Subject[PATCH V4 3/3] dt-bindings: sdhci-omap: Add example for using external dma
Date
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>
---
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 393848c..c73fd47 100644
--- a/Documentation/devicetree/bindings/mmc/sdhci-omap.txt
+++ b/Documentation/devicetree/bindings/mmc/sdhci-omap.txt
@@ -12,6 +12,11 @@ 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 {
@@ -20,4 +25,6 @@ Example:
ti,hwmods = "mmc1";
bus-width = <4>;
vmmc-supply = <&vmmc>; /* phandle to regulator node */
+ dmas = <&sdma 61 &sdma 62>;
+ dma-names = "tx", "rx";
};
--
2.7.4
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