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From: Chunyan Zhang <zhang.chunyan@linaro.org>
To: Ulf Hansson <ulf.hansson@linaro.org>,
	Adrian Hunter <adrian.hunter@intel.com>
Cc: linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org,
	Arnd Bergmann <arnd@arndb.de>, Mark Brown <broonie@kernel.org>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Sekhar Nori <nsekhar@ti.com>,
	Chunyan Zhang <zhang.lyra@gmail.com>
Subject: [PATCH RFC 3/3] dt-bindings: sdhci-omap: Add example for using dmaengine
Date: Mon,  5 Nov 2018 11:16:50 +0800	[thread overview]
Message-ID: <1541387810-24867-4-git-send-email-zhang.chunyan@linaro.org> (raw)
In-Reply-To: <1541387810-24867-1-git-send-email-zhang.chunyan@linaro.org>

sdhci-omap can support both external dma controllers via dmaengine
framework as well as ADMA in which the controller acts as DMA master.

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


      parent reply	other threads:[~2018-11-05  3:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-05  3:16 [PATCH RFC 0/3] Add support for using external dma in SDHCI Chunyan Zhang
2018-11-05  3:16 ` [PATCH RFC 1/3] mmc: sdhci: add support for using external DMA devices Chunyan Zhang
2018-11-06 11:16   ` Arnd Bergmann
2018-11-07  2:56     ` Chunyan Zhang
2018-11-07 14:13   ` Adrian Hunter
2018-11-05  3:16 ` [PATCH RFC 2/3] mmc: sdhci-omap: Add using external dma Chunyan Zhang
2018-11-05  4:25   ` Kishon Vijay Abraham I
2018-11-06 12:51     ` Arnd Bergmann
2018-11-07  3:00       ` Chunyan Zhang
2018-11-09  5:27       ` Kishon Vijay Abraham I
2018-11-19 16:32         ` Ulf Hansson
2018-11-05  3:16 ` Chunyan Zhang [this message]

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