[PATCH v4 1/4] dt-bindings: dmaengine: sf-pdma: add bindins for SiFive PDMA

From: Green Wan
Date: Thu Oct 03 2019 - 05:10:58 EST


Add DT bindings document for Platform DMA(PDMA) driver of board,
HiFive Unleashed Rev A00.

Signed-off-by: Green Wan <green.wan@xxxxxxxxxx>
---
.../bindings/dma/sifive,fu540-c000-pdma.yaml | 55 +++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml

diff --git a/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
new file mode 100644
index 000000000000..2ca3ddbe1ff4
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/sifive,fu540-c000-pdma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: SiFive Unleashed Rev C000 Platform DMA
+
+maintainers:
+ - Green Wan <green.wan@xxxxxxxxxx>
+ - Palmer Debbelt <palmer@xxxxxxxxxx>
+ - Paul Walmsley <paul.walmsley@xxxxxxxxxx>
+
+description: |
+ Platform DMA is a DMA engine of SiFive Unleashed. It supports 4
+ channels. Each channel has 2 interrupts. One is for DMA done and
+ the other is for DME error.
+
+ In different SoC, DMA could be attached to different IRQ line.
+ DT file need to be changed to meet the difference. For technical
+ doc,
+
+ https://static.dev.sifive.com/FU540-C000-v1.0.pdf
+
+properties:
+ compatible:
+ items:
+ - const: sifive,fu540-c000-pdma
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 1
+ maxItems: 8
+
+ '#dma-cells':
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - '#dma-cells'
+
+examples:
+ - |
+ dma@3000000 {
+ compatible = "sifive,fu540-c000-pdma";
+ reg = <0x0 0x3000000 0x0 0x8000>;
+ interrupts = <23 24 25 26 27 28 29 30>;
+ #dma-cells = <1>;
+ };
+
+...
--
2.17.1