[PATCH v5 1/2] dt-bindings: dma: Add Loongson-1 DMA

Keguang Zhang
2023-09-28T12:20:20Z

Add devicetree binding document for Loongson-1 DMA.

Signed-off-by: Keguang Zhang <keguang.zhang@gmail.com>
---
V4 -> V5:
A newly added patch

.../bindings/dma/loongson,ls1x-dma.yaml | 64 +++++++++++++++++++
1 file changed, 64 insertions(+)
create mode 100644 Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml

diff --git a/Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml b/Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml
new file mode 100644
index 000000000000..51b45d998a58
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/loongson,ls1x-dma.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/loongson,ls1x-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Loongson-1 DMA Controller
+
+maintainers:
+ - Keguang Zhang <keguang.zhang@gmail.com>
+
+description: |
+ Loongson-1 DMA controller provides 3 independent channels for
+ peripherals such as NAND and AC97.
+
+properties:
+ compatible:
+ enum:
+ - loongson,ls1b-dma
+ - loongson,ls1c-dma
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ description: Each channel has a dedicated interrupt line.
+ minItems: 1
+ maxItems: 3
+
+ interrupt-names:
+ minItems: 1
+ items:
+ - pattern: ch0
+ - pattern: ch1
+ - pattern: ch2
+
+ '#dma-cells':
+ description: The single cell represents the channel index.
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - interrupts
+ - interrupt-names
+ - '#dma-cells'
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ dma: dma-controller@1fd01160 {
+ compatible = "loongson,ls1b-dma";
+ reg = <0x1fd01160 0x18>;
+
+ interrupt-parent = <&intc0>;
+ interrupts = <13 IRQ_TYPE_EDGE_RISING>,
+ <14 IRQ_TYPE_EDGE_RISING>,
+ <15 IRQ_TYPE_EDGE_RISING>;
+ interrupt-names = "ch0", "ch1", "ch2";
+
+ #dma-cells = <1>;
+ };
--
2.39.2