* [PATCH 1/3] dt-bindings: dmaengine: sf-pdma: add bindins for SiFive PDMA
@ 2019-09-17 6:22 Green Wan
0 siblings, 0 replies; only message in thread
From: Green Wan @ 2019-09-17 6:22 UTC (permalink / raw)
Cc: Mark Rutland, devicetree, Greg Kroah-Hartman, Linus Walleij,
Palmer Dabbelt, Nicolas Ferre, Green Wan, linux-kernel,
dmaengine, Vinod Koul, Rob Herring, Paul Walmsley,
Mauro Carvalho Chehab, linux-hackers, linux-riscv,
Paul E. McKenney, David S. Miller
Add DT bindings document for Platform DMA(PDMA) driver of board,
HiFive Unleashed Rev A00.
Signed-off-by: Green Wan <green.wan@sifive.com>
---
.../bindings/dma/sifive,fu540-c000-pdma.yaml | 63 +++++++++++++++++++
MAINTAINERS | 5 ++
2 files changed, 68 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..b5423f1cfcaf
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
@@ -0,0 +1,63 @@
+# 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@sifive.com>
+ - Palmer Debbelt <palmer@sifive.com>
+ - Paul Walmsley <paul.walmsley@sifive.com>
+
+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: 8
+ maxItems: 8
+
+ interrupt-parent:
+ description:
+ Interrupt parent must correspond to the name PLIC interrupt
+ controller, i.e. "plic0"
+ maxItems: 1
+
+ '#dma-cells':
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - interrupt-parent
+ - interrupts
+ - '#dma-cells'
+
+examples:
+ - |
+ dma@3000000 {
+ compatible = "sifive,fu540-c000-pdma";
+ reg = <0x0 0x3000000 0x0 0x8000>;
+ interrupt-parent = <&plic0>;
+ interrupts = <23 24 25 26 27 28 29 30>;
+ #dma-cells = <1>;
+ };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index 49f75d1b7b51..d0caa09a479e 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14591,6 +14591,11 @@ F: drivers/media/usb/siano/
F: drivers/media/usb/siano/
F: drivers/media/mmc/siano/
+SIFIVE PDMA DRIVER
+M: Green Wan <green.wan@sifive.com>
+S: Maintained
+F: Documentation/devicetree/bindings/dma/sifive,fu540-c000-pdma.yaml
+
SIFIVE DRIVERS
M: Palmer Dabbelt <palmer@sifive.com>
M: Paul Walmsley <paul.walmsley@sifive.com>
--
2.17.1
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