diff mbox series

[v3,2/5] dt-bindings: dmaengine: Add AST2600 UDMA bindings

Message ID 20230320081133.23655-3-chiawei_wang@aspeedtech.com (mailing list archive)
State Changes Requested
Headers show
Series arm: aspeed: Add UART DMA support | expand

Commit Message

ChiaWei Wang March 20, 2023, 8:11 a.m. UTC 
Add the dmaengine bindings for the UART DMA engine of Aspeed AST2600 SoC.

Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
---
 .../bindings/dma/aspeed,ast2600-udma.yaml     | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/dma/aspeed,ast2600-udma.yaml

Comments

Rob Herring (Arm) March 21, 2023, 9:32 p.m. UTC | #1 
On Mon, 20 Mar 2023 16:11:30 +0800, Chia-Wei Wang wrote:
> Add the dmaengine bindings for the UART DMA engine of Aspeed AST2600 SoC.
> 
> Signed-off-by: Chia-Wei Wang <chiawei_wang@aspeedtech.com>
> ---
>  .../bindings/dma/aspeed,ast2600-udma.yaml     | 56 +++++++++++++++++++
>  1 file changed, 56 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/dma/aspeed,ast2600-udma.yaml
> 

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

Patch

diff --git a/Documentation/devicetree/bindings/dma/aspeed,ast2600-udma.yaml b/Documentation/devicetree/bindings/dma/aspeed,ast2600-udma.yaml
new file mode 100644
index 000000000000..4c0a5edf2168
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/aspeed,ast2600-udma.yaml
@@ -0,0 +1,56 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/aspeed,ast2600-udma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Aspeed AST2600 UART DMA controller
+
+maintainers:
+  - Chia-Wei Wang <chiawei_wang@aspeedtech.com>
+
+description:
+  The Aspeed AST2600 UDMA controller provides direct memory access capabilities
+  for the NS16550A-compatible UART devices inside AST2600 SoCs. UDMA supports 28
+  DMA channels and each UART device has its dedicated pair of TX and RX channels.
+
+allOf:
+  - $ref: dma-controller.yaml#
+
+properties:
+  compatible:
+    const: aspeed,ast2600-udma
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  "#dma-cells":
+    const: 1
+
+  dma-channels:
+    maximum: 28
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#dma-cells"
+  - dma-channels
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    dma-controller@1e79e000 {
+        compatible = "aspeed,ast2600-udma";
+        reg = <0x1e79e000 0x1000>;
+        interrupts = <GIC_SPI 56 IRQ_TYPE_LEVEL_HIGH>;
+        dma-channels = <28>;
+        #dma-cells = <1>;
+    };
+
+...