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Message-Id: <20211217170644.3145332-1-robh@kernel.org>
Date: Fri, 17 Dec 2021 11:06:43 -0600
From: Rob Herring <robh@...nel.org>
To: Vinod Koul <vkoul@...nel.org>
Cc: dmaengine@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH] dt-bindings: dma: pl330: Convert to DT schema
Convert the Arm PL330 DMA controller binding to DT schema.
The '#dma-channels' and '#dma-requests' properties are unused as they are
discoverable and are non-standard (the standard props don't have '#'). So
drop them from the binding.
Cc: Vinod Koul <vkoul@...nel.org>
Cc: dmaengine@...r.kernel.org
Signed-off-by: Rob Herring <robh@...nel.org>
---
.../devicetree/bindings/dma/arm,pl330.yaml | 83 +++++++++++++++++++
.../devicetree/bindings/dma/arm-pl330.txt | 49 -----------
2 files changed, 83 insertions(+), 49 deletions(-)
create mode 100644 Documentation/devicetree/bindings/dma/arm,pl330.yaml
delete mode 100644 Documentation/devicetree/bindings/dma/arm-pl330.txt
diff --git a/Documentation/devicetree/bindings/dma/arm,pl330.yaml b/Documentation/devicetree/bindings/dma/arm,pl330.yaml
new file mode 100644
index 000000000000..decab185cf4d
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/arm,pl330.yaml
@@ -0,0 +1,83 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/arm,pl330.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM PrimeCell PL330 DMA Controller
+
+maintainers:
+ - Vinod Koul <vkoul@...nel.org>
+
+description:
+ The ARM PrimeCell PL330 DMA controller can move blocks of memory contents
+ between memory and peripherals or memory to memory.
+
+# We need a select here so we don't match all nodes with 'arm,primecell'
+select:
+ properties:
+ compatible:
+ contains:
+ const: arm,pl330
+ required:
+ - compatible
+
+allOf:
+ - $ref: dma-controller.yaml#
+ - $ref: /schemas/arm/primecell.yaml#
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - arm,pl330
+ - const: arm,primecell
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ minItems: 1
+ maxItems: 32
+ description: A single combined interrupt or an interrupt per event
+
+ '#dma-cells':
+ const: 1
+ description: Contains the DMA request number for the consumer
+
+ arm,pl330-broken-no-flushp:
+ type: boolean
+ description: quirk for avoiding to execute DMAFLUSHP
+
+ arm,pl330-periph-burst:
+ type: boolean
+ description: quirk for performing burst transfer only
+
+ dma-coherent: true
+
+ resets:
+ minItems: 1
+ maxItems: 2
+
+ reset-names:
+ minItems: 1
+ items:
+ - const: dma
+ - const: dma-ocp
+
+required:
+ - compatible
+ - reg
+ - interrupts
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ dma-controller@...80000 {
+ compatible = "arm,pl330", "arm,primecell";
+ reg = <0x12680000 0x1000>;
+ interrupts = <99>;
+ #dma-cells = <1>;
+ };
+...
diff --git a/Documentation/devicetree/bindings/dma/arm-pl330.txt b/Documentation/devicetree/bindings/dma/arm-pl330.txt
deleted file mode 100644
index 315e90122afa..000000000000
--- a/Documentation/devicetree/bindings/dma/arm-pl330.txt
+++ /dev/null
@@ -1,49 +0,0 @@
-* ARM PrimeCell PL330 DMA Controller
-
-The ARM PrimeCell PL330 DMA controller can move blocks of memory contents
-between memory and peripherals or memory to memory.
-
-Required properties:
- - compatible: should include both "arm,pl330" and "arm,primecell".
- - reg: physical base address of the controller and length of memory mapped
- region.
- - interrupts: interrupt number to the cpu.
-
-Optional properties:
- - dma-coherent : Present if dma operations are coherent
- - #dma-cells: must be <1>. used to represent the number of integer
- cells in the dmas property of client device.
- - dma-channels: contains the total number of DMA channels supported by the DMAC
- - dma-requests: contains the total number of DMA requests supported by the DMAC
- - arm,pl330-broken-no-flushp: quirk for avoiding to execute DMAFLUSHP
- - arm,pl330-periph-burst: quirk for performing burst transfer only
- - resets: contains an entry for each entry in reset-names.
- See ../reset/reset.txt for details.
- - reset-names: must contain at least "dma", and optional is "dma-ocp".
-
-Example:
-
- pdma0: pdma@...80000 {
- compatible = "arm,pl330", "arm,primecell";
- reg = <0x12680000 0x1000>;
- interrupts = <99>;
- #dma-cells = <1>;
- #dma-channels = <8>;
- #dma-requests = <32>;
- };
-
-Client drivers (device nodes requiring dma transfers from dev-to-mem or
-mem-to-dev) should specify the DMA channel numbers and dma channel names
-as shown below.
-
- [property name] = <[phandle of the dma controller] [dma request id]>;
- [property name] = <[dma channel name]>
-
- where 'dma request id' is the dma request number which is connected
- to the client controller. The 'property name' 'dmas' and 'dma-names'
- as required by the generic dma device tree binding helpers. The dma
- names correspond 1:1 with the dma request ids in the dmas property.
-
- Example: dmas = <&pdma0 12
- &pdma1 11>;
- dma-names = "tx", "rx";
--
2.32.0
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