diff mbox series

[v2,1/2] dt-bindings: dmaengine: add DT binding for UniPhier MIO DMAC

Message ID 1535074873-15617-2-git-send-email-yamada.masahiro@socionext.com
State Superseded
Headers show
Series [v2,1/2] dt-bindings: dmaengine: add DT binding for UniPhier MIO DMAC | expand

Commit Message

Masahiro Yamada Aug. 24, 2018, 1:41 a.m. UTC
The MIO DMAC (Media IO DMA Controller) is used in UniPhier LD4,
Pro4, and sLD8 SoCs.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

---

Changes in v2:
 - Rename the node "dmac" to "dma-controller"
 - Remove dma-channels property

 .../devicetree/bindings/dma/uniphier-mio-dmac.txt  | 25 ++++++++++++++++++++++
 1 file changed, 25 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt

-- 
2.7.4

Comments

Rob Herring (Arm) Aug. 29, 2018, 12:36 a.m. UTC | #1
On Fri, 24 Aug 2018 10:41:12 +0900, Masahiro Yamada wrote:
> The MIO DMAC (Media IO DMA Controller) is used in UniPhier LD4,

> Pro4, and sLD8 SoCs.

> 

> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

> ---

> 

> Changes in v2:

>  - Rename the node "dmac" to "dma-controller"

>  - Remove dma-channels property

> 

>  .../devicetree/bindings/dma/uniphier-mio-dmac.txt  | 25 ++++++++++++++++++++++

>  1 file changed, 25 insertions(+)

>  create mode 100644 Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt

> 


Reviewed-by: Rob Herring <robh@kernel.org>
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt b/Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt
new file mode 100644
index 0000000..b12388d
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/uniphier-mio-dmac.txt
@@ -0,0 +1,25 @@ 
+UniPhier Media IO DMA controller
+
+This works as an external DMA engine for SD/eMMC controllers etc.
+found in UniPhier LD4, Pro4, sLD8 SoCs.
+
+Required properties:
+- compatible: should be "socionext,uniphier-mio-dmac".
+- reg: offset and length of the register set for the device.
+- interrupts: a list of interrupt specifiers associated with the DMA channels.
+- clocks: a single clock specifier.
+- #dma-cells: should be <1>. The single cell represents the channel index.
+
+Example:
+	dmac: dma-controller@5a000000 {
+		compatible = "socionext,uniphier-mio-dmac";
+		reg = <0x5a000000 0x1000>;
+		interrupts = <0 68 4>, <0 68 4>, <0 69 4>, <0 70 4>,
+			     <0 71 4>, <0 72 4>, <0 73 4>, <0 74 4>;
+		clocks = <&mio_clk 7>;
+		#dma-cells = <1>;
+	};
+
+Note:
+In the example above, "interrupts = <0 68 4>, <0 68 4>, ..." is not a typo.
+The first two channels share a single interrupt line.