linux-kernel - [RFC PATCH v2 12/16] mmc: omap_hsmmc: add generic DMA request support to the DT binding

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Message-Id: <1349982281-10785-13-git-send-email-mporter@ti.com>
Date:	Thu, 11 Oct 2012 15:04:37 -0400
From:	Matt Porter <mporter@...com>
To:	Tony Lindgren <tony@...mide.com>, Sekhar Nori <nsekhar@...com>,
	Grant Likely <grant.likely@...retlab.ca>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Benoit Cousson <b-cousson@...com>,
	Russell King <linux@....linux.org.uk>,
	Vinod Koul <vinod.koul@...el.com>,
	Rob Landley <rob@...dley.net>, Chris Ball <cjb@...top.org>
Cc:	Devicetree Discuss <devicetree-discuss@...ts.ozlabs.org>,
	Linux OMAP List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux DaVinci Kernel List 
	<davinci-linux-open-source@...ux.davincidsp.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Documentation List <linux-doc@...r.kernel.org>,
	Linux MMC List <linux-mmc@...r.kernel.org>,
	Linux SPI Devel List 
	<spi-devel-general@...ts.sourceforge.net>,
	Arnd Bergmann <arnd@...db.de>, Dan Williams <djbw@...com>,
	Rob Herring <rob.herring@...xeda.com>
Subject: [RFC PATCH v2 12/16] mmc: omap_hsmmc: add generic DMA request support to the DT binding

The binding definition is based on the generic DMA request binding.

Signed-off-by: Matt Porter <mporter@...com>
---
 .../devicetree/bindings/mmc/ti-omap-hsmmc.txt      |   25 +++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
index be76a23..d1b8932 100644
--- a/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
+++ b/Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
@@ -19,8 +19,28 @@ ti,dual-volt: boolean, supports dual voltage cards
 "supply-name" examples are "vmmc", "vmmc_aux" etc
 ti,non-removable: non-removable slot (like eMMC)
 ti,needs-special-reset: Requires a special softreset sequence
+dmas: DMA controller phandle and DMA request value ordered pair
+One tx and one rx pair is required.
+dma-names: DMA request names. These strings correspond 1:1 with
+the ordered pairs in dmas. The RX request must be "rx" and the
+TX request must be "tx".
+
+Examples:
+
+[hwmod populated DMA resources]
+
+	mmc1: mmc@...809c000 {
+		compatible = "ti,omap4-hsmmc";
+		reg = <0x4809c000 0x400>;
+		ti,hwmods = "mmc1";
+		ti,dual-volt;
+		bus-width = <4>;
+		vmmc-supply = <&vmmc>; /* phandle to regulator node */
+		ti,non-removable;
+	};
+
+[generic DMA request binding]
 
-Example:
 	mmc1: mmc@...809c000 {
 		compatible = "ti,omap4-hsmmc";
 		reg = <0x4809c000 0x400>;
@@ -29,4 +49,7 @@ Example:
 		bus-width = <4>;
 		vmmc-supply = <&vmmc>; /* phandle to regulator node */
 		ti,non-removable;
+		dmas = <&edma 24
+			&edma 25>;
+		dma-names = "tx", "rx";
 	};
-- 
1.7.9.5

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