From: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
To: Vinod Koul <vkoul@kernel.org>,
Dan Williams <dan.j.williams@intel.com>,
Masahiro Yamada <yamada.masahiro@socionext.com>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>
Cc: dmaengine@vger.kernel.org, devicetree@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org,
Masami Hiramatsu <masami.hiramatsu@linaro.org>,
Jassi Brar <jaswinder.singh@linaro.org>,
Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Subject: [PATCH v2 1/2] dt-bindings: dmaengine: Add UniPhier external DMA controller bindings
Date: Thu, 30 Jan 2020 14:27:27 +0900 [thread overview]
Message-ID: <1580362048-28455-2-git-send-email-hayashi.kunihiko@socionext.com> (raw)
In-Reply-To: <1580362048-28455-1-git-send-email-hayashi.kunihiko@socionext.com>
Add devicetree binding documentation for external DMA controller
implemented on Socionext UniPhier SoCs.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
---
.../bindings/dma/socionext,uniphier-xdmac.yaml | 57 ++++++++++++++++++++++
1 file changed, 57 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/socionext,uniphier-xdmac.yaml
diff --git a/Documentation/devicetree/bindings/dma/socionext,uniphier-xdmac.yaml b/Documentation/devicetree/bindings/dma/socionext,uniphier-xdmac.yaml
new file mode 100644
index 00000000..32abf18
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/socionext,uniphier-xdmac.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/socionext,uniphier-xdmac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Socionext UniPhier external DMA controller
+
+description: |
+ This describes the devicetree bindings for an external DMA engine to perform
+ memory-to-memory or peripheral-to-memory data transfer capable of supporting
+ 16 channels, implemented in Socionext UniPhier SoCs.
+
+maintainers:
+ - Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+
+allOf:
+ - $ref: "dma-controller.yaml#"
+
+properties:
+ compatible:
+ items:
+ - const: socionext,uniphier-xdmac
+
+ reg:
+ minItems: 1
+ maxItems: 2
+
+ interrupts:
+ maxItems: 1
+
+ "#dma-cells":
+ const: 2
+ description: |
+ DMA request from clients consists of 2 cells:
+ 1. Channel index
+ 2. Transfer request factor number, If no transfer factor, use 0.
+ The number is SoC-specific, and this should be specified with
+ relation to the device to use the DMA controller.
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - "#dma-cells"
+
+examples:
+ - |
+ xdmac: dma-controller@5fc10000 {
+ compatible = "socionext,uniphier-xdmac";
+ reg = <0x5fc10000 0x1000>, <0x5fc20000 0x800>;
+ interrupts = <0 188 4>;
+ #dma-cells = <2>;
+ dma-channels = <16>;
+ };
+
+...
--
2.7.4
next prev parent reply other threads:[~2020-01-30 5:27 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-30 5:27 [PATCH v2 0/2] dmaengine: Add UniPhier XDMAC driver Kunihiko Hayashi
2020-01-30 5:27 ` Kunihiko Hayashi [this message]
2020-02-06 17:54 ` [PATCH v2 1/2] dt-bindings: dmaengine: Add UniPhier external DMA controller bindings Rob Herring
2020-02-07 1:15 ` Kunihiko Hayashi
2020-01-30 5:27 ` [PATCH v2 2/2] dmaengine: uniphier-xdmac: Add UniPhier external DMA controller driver Kunihiko Hayashi
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