[3/7] dt-bindings: sdhci-omap: Add example for using external dma

Message ID 20190111110851.6805-4-faiz_abbas@ti.com
State New
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Series
  • [1/7] mmc: sdhci: add support for using external DMA devices
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Commit Message

Faiz Abbas Jan. 11, 2019, 11:08 a.m.
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(+)

-- 
2.19.2

Patch

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";
 	};