From: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To: vkoul@kernel.org, dan.j.williams@intel.com, afaerber@suse.de,
robh+dt@kernel.org, dmaengine@vger.kernel.org,
liuwei@actions-semi.com, 96boards@ucrobotics.com,
devicetree@vger.kernel.org, daniel.thompson@linaro.org,
amit.kucheria@linaro.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, hzhang@ucrobotics.com,
bdong@ucrobotics.com, manivannanece23@gmail.com,
thomas.liau@actions-semi.com, jeff.chen@actions-semi.com,
pn@denx.de, edgar.righi@lsitec.org.br
Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Subject: [PATCH v3 1/4] dt-bindings: dmaengine: Add binding for Actions Semi Owl SoCs
Date: Thu, 26 Jul 2018 10:36:55 +0530 [thread overview]
Message-ID: <20180726050658.1399-2-manivannan.sadhasivam@linaro.org> (raw)
In-Reply-To: <20180726050658.1399-1-manivannan.sadhasivam@linaro.org>
Add devicetree binding for Actions Semi Owl SoCs DMA controller.
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
.../devicetree/bindings/dma/owl-dma.txt | 47 +++++++++++++++++++
1 file changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/owl-dma.txt
diff --git a/Documentation/devicetree/bindings/dma/owl-dma.txt b/Documentation/devicetree/bindings/dma/owl-dma.txt
new file mode 100644
index 000000000000..03e9bb12b75f
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/owl-dma.txt
@@ -0,0 +1,47 @@
+* Actions Semi Owl SoCs DMA controller
+
+This binding follows the generic DMA bindings defined in dma.txt.
+
+Required properties:
+- compatible: Should be "actions,s900-dma".
+- reg: Should contain DMA registers location and length.
+- interrupts: Should contain 4 interrupts shared by all channel.
+- #dma-cells: Must be <1>. Used to represent the number of integer
+ cells in the dmas property of client device.
+- dma-channels: Physical channels supported.
+- dma-requests: Number of DMA request signals supported by the controller.
+ Refer to Documentation/devicetree/bindings/dma/dma.txt
+- clocks: Phandle and Specifier of the clock feeding the DMA controller.
+
+Example:
+
+Controller:
+ dma: dma-controller@e0260000 {
+ compatible = "actions,s900-dma";
+ reg = <0x0 0xe0260000 0x0 0x1000>;
+ interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 58 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 59 IRQ_TYPE_LEVEL_HIGH>,
+ <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
+ #dma-cells = <1>;
+ dma-channels = <12>;
+ dma-requests = <46>;
+ clocks = <&clock CLK_DMAC>;
+ };
+
+Client:
+
+DMA clients connected to the Actions Semi Owl SoCs DMA controller must
+use the format described in the dma.txt file, using a two-cell specifier
+for each channel.
+
+The two cells in order are:
+1. A phandle pointing to the DMA controller.
+2. The channel id.
+
+uart5: serial@e012a000 {
+ ...
+ dma-names = "tx", "rx";
+ dmas = <&dma 26>, <&dma 27>;
+ ...
+};
--
2.17.1
next prev parent reply other threads:[~2018-07-26 5:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-26 5:06 [PATCH v3 0/4] Add Actions Semi Owl family S900 DMA Controller support Manivannan Sadhasivam
2018-07-26 5:06 ` Manivannan Sadhasivam [this message]
2018-07-30 23:10 ` [PATCH v3 1/4] dt-bindings: dmaengine: Add binding for Actions Semi Owl SoCs Rob Herring
2018-08-09 2:46 ` Vinod
2018-07-26 5:06 ` [PATCH v3 2/4] arm64: dts: actions: Add Actions Semi S900 DMA Controller Manivannan Sadhasivam
2018-07-26 5:06 ` [PATCH v3 3/4] dmaengine: Add Actions Semi Owl family S900 DMA driver Manivannan Sadhasivam
2018-08-09 2:46 ` Vinod
2018-07-26 5:06 ` [PATCH v3 4/4] MAINTAINERS: Add entry for Actions Semi Owl SoCs " Manivannan Sadhasivam
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