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From: <shun-chih.yu@mediatek.com>
To: Sean Wang <sean.wang@mediatek.com>, Vinod Koul <vkoul@kernel.org>,
	Rob Herring <robh+dt@kernel.org>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Dan Williams <dan.j.williams@intel.com>
Cc: <dmaengine@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<srv_wsdupstream@mediatek.com>,
	Shun-Chih Yu <shun-chih.yu@mediatek.com>
Subject: [PATCH v2 1/1] dt-bindings: dmaengine: Add MediaTek Command-Queue DMA controller bindings
Date: Thu, 14 Feb 2019 15:54:52 +0800	[thread overview]
Message-ID: <1550130892-19488-2-git-send-email-shun-chih.yu@mediatek.com> (raw)
In-Reply-To: <1550130892-19488-1-git-send-email-shun-chih.yu@mediatek.com>

From: Shun-Chih Yu <shun-chih.yu@mediatek.com>

Document the devicetree bindings for MediaTek Command-Queue DMA controller
which could be found on MT6765 SoC or other similar Mediatek SoCs.

Signed-off-by: Shun-Chih Yu <shun-chih.yu@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Sean Wang <sean.wang@kernel.org>
---
 .../devicetree/bindings/dma/mtk-cqdma.txt          |   31 ++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/mtk-cqdma.txt

diff --git a/Documentation/devicetree/bindings/dma/mtk-cqdma.txt b/Documentation/devicetree/bindings/dma/mtk-cqdma.txt
new file mode 100644
index 0000000..fb12927
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/mtk-cqdma.txt
@@ -0,0 +1,31 @@
+MediaTek Command-Queue DMA Controller
+==================================
+
+Required properties:
+
+- compatible:	Must be "mediatek,mt6765-cqdma" for MT6765.
+- reg:		Should contain the base address and length for each channel.
+- interrupts:	Should contain references to the interrupts for each channel.
+- clocks:	Should be the clock specifiers corresponding to the entry in
+		clock-names property.
+- clock-names:	Should contain "cqdma" entries.
+- dma-channels: The number of DMA channels supported by the controller.
+- dma-requests: The number of DMA request supported by the controller.
+- #dma-cells: 	The length of the DMA specifier, must be <1>. This one cell
+		in dmas property of a client device represents the channel
+		number.
+Example:
+
+        cqdma: dma-controller@10212000 {
+		compatible = "mediatek,mt6765-cqdma";
+		reg = <0 0x10212000 0 0x1000>;
+		interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_LOW>,
+			<GIC_SPI 114 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infracfg CLK_IFR_CQ_DMA>;
+		clock-names = "cqdma";
+		dma-channels = <2>;
+		dma-requests = <32>;
+		#dma-cells = <1>;
+	};
+
+DMA clients must use the format described in dma/dma.txt file.
-- 
1.7.9.5


  reply	other threads:[~2019-02-14  7:55 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-14  7:54 [PATCH v2] dt-bindings: dmaengine: Add MediaTek Command-Queue DMA controller bindings shun-chih.yu
2019-02-14  7:54 ` shun-chih.yu [this message]
2019-02-14  9:04   ` [PATCH v2 1/1] " Matthias Brugger
2019-02-14  9:18   ` Matthias Brugger
2019-02-14  9:19   ` Matthias Brugger

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